|  | @@ -0,0 +1,711 @@
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				|  |  | +/*
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				|  |  | + *
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				|  |  | + * Copyright 2016, Google Inc.
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				|  |  | + * All rights reserved.
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				|  |  | + *
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				|  |  | + * Redistribution and use in source and binary forms, with or without
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				|  |  | + * modification, are permitted provided that the following conditions are
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				|  |  | + * met:
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				|  |  | + *
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				|  |  | + *     * Redistributions of source code must retain the above copyright
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				|  |  | + * notice, this list of conditions and the following disclaimer.
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				|  |  | + *     * Redistributions in binary form must reproduce the above
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				|  |  | + * copyright notice, this list of conditions and the following disclaimer
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				|  |  | + * in the documentation and/or other materials provided with the
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				|  |  | + * distribution.
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				|  |  | + *     * Neither the name of Google Inc. nor the names of its
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				|  |  | + * contributors may be used to endorse or promote products derived from
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				|  |  | + * this software without specific prior written permission.
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				|  |  | + *
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				|  |  | + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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				|  |  | + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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				|  |  | + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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				|  |  | + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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				|  |  | + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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				|  |  | + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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				|  |  | + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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				|  |  | + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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				|  |  | + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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				|  |  | + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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				|  |  | + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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				|  |  | + *
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				|  |  | + */
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				|  |  | +
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				|  |  | +#include "src/core/lib/iomgr/resource_quota.h"
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				|  |  | +
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				|  |  | +#include <string.h>
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				|  |  | +
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				|  |  | +#include <grpc/support/alloc.h>
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				|  |  | +#include <grpc/support/log.h>
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				|  |  | +#include <grpc/support/string_util.h>
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				|  |  | +#include <grpc/support/useful.h>
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				|  |  | +
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				|  |  | +#include "src/core/lib/iomgr/combiner.h"
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				|  |  | +
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				|  |  | +int grpc_resource_quota_trace = 0;
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				|  |  | +
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				|  |  | +typedef bool (*bpstate_func)(grpc_exec_ctx *exec_ctx,
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				|  |  | +                             grpc_resource_quota *resource_quota);
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				|  |  | +
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				|  |  | +typedef struct {
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				|  |  | +  grpc_resource_user *head;
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				|  |  | +  grpc_resource_user *tail;
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				|  |  | +} grpc_resource_user_list;
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				|  |  | +
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				|  |  | +struct grpc_resource_quota {
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				|  |  | +  gpr_refcount refs;
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				|  |  | +
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				|  |  | +  grpc_combiner *combiner;
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				|  |  | +  int64_t size;
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				|  |  | +  int64_t free_pool;
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				|  |  | +
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				|  |  | +  bool step_scheduled;
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				|  |  | +  bool reclaiming;
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				|  |  | +  grpc_closure bpstep_closure;
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				|  |  | +  grpc_closure bpreclaimation_done_closure;
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				|  |  | +
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				|  |  | +  grpc_resource_user *roots[GRPC_BULIST_COUNT];
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				|  |  | +
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				|  |  | +  char *name;
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				|  |  | +};
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				|  |  | +
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				|  |  | +/*******************************************************************************
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				|  |  | + * list management
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				|  |  | + */
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				|  |  | +
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				|  |  | +static void bulist_add_tail(grpc_resource_user *resource_user,
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				|  |  | +                            grpc_bulist list) {
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				|  |  | +  grpc_resource_quota *resource_quota = resource_user->resource_quota;
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				|  |  | +  grpc_resource_user **root = &resource_quota->roots[list];
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				|  |  | +  if (*root == NULL) {
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				|  |  | +    *root = resource_user;
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				|  |  | +    resource_user->links[list].next = resource_user->links[list].prev =
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				|  |  | +        resource_user;
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				|  |  | +  } else {
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				|  |  | +    resource_user->links[list].next = *root;
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				|  |  | +    resource_user->links[list].prev = (*root)->links[list].prev;
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				|  |  | +    resource_user->links[list].next->links[list].prev =
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				|  |  | +        resource_user->links[list].prev->links[list].next = resource_user;
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				|  |  | +  }
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				|  |  | +}
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				|  |  | +
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				|  |  | +static void bulist_add_head(grpc_resource_user *resource_user,
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				|  |  | +                            grpc_bulist list) {
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				|  |  | +  grpc_resource_quota *resource_quota = resource_user->resource_quota;
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				|  |  | +  grpc_resource_user **root = &resource_quota->roots[list];
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				|  |  | +  if (*root == NULL) {
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				|  |  | +    *root = resource_user;
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				|  |  | +    resource_user->links[list].next = resource_user->links[list].prev =
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				|  |  | +        resource_user;
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				|  |  | +  } else {
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				|  |  | +    resource_user->links[list].next = (*root)->links[list].next;
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				|  |  | +    resource_user->links[list].prev = *root;
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				|  |  | +    resource_user->links[list].next->links[list].prev =
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				|  |  | +        resource_user->links[list].prev->links[list].next = resource_user;
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				|  |  | +    *root = resource_user;
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				|  |  | +  }
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				|  |  | +}
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				|  |  | +
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				|  |  | +static bool bulist_empty(grpc_resource_quota *resource_quota,
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				|  |  | +                         grpc_bulist list) {
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				|  |  | +  return resource_quota->roots[list] == NULL;
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				|  |  | +}
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				|  |  | +
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				|  |  | +static grpc_resource_user *bulist_pop(grpc_resource_quota *resource_quota,
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				|  |  | +                                      grpc_bulist list) {
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				|  |  | +  grpc_resource_user **root = &resource_quota->roots[list];
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				|  |  | +  grpc_resource_user *resource_user = *root;
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				|  |  | +  if (resource_user == NULL) {
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				|  |  | +    return NULL;
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				|  |  | +  }
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				|  |  | +  if (resource_user->links[list].next == resource_user) {
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				|  |  | +    *root = NULL;
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				|  |  | +  } else {
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				|  |  | +    resource_user->links[list].next->links[list].prev =
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				|  |  | +        resource_user->links[list].prev;
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				|  |  | +    resource_user->links[list].prev->links[list].next =
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				|  |  | +        resource_user->links[list].next;
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				|  |  | +    *root = resource_user->links[list].next;
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				|  |  | +  }
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				|  |  | +  resource_user->links[list].next = resource_user->links[list].prev = NULL;
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				|  |  | +  return resource_user;
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				|  |  | +}
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				|  |  | +
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				|  |  | +static void bulist_remove(grpc_resource_user *resource_user, grpc_bulist list) {
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				|  |  | +  if (resource_user->links[list].next == NULL) return;
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				|  |  | +  grpc_resource_quota *resource_quota = resource_user->resource_quota;
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				|  |  | +  if (resource_quota->roots[list] == resource_user) {
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				|  |  | +    resource_quota->roots[list] = resource_user->links[list].next;
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				|  |  | +    if (resource_quota->roots[list] == resource_user) {
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				|  |  | +      resource_quota->roots[list] = NULL;
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				|  |  | +    }
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				|  |  | +  }
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				|  |  | +  resource_user->links[list].next->links[list].prev =
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				|  |  | +      resource_user->links[list].prev;
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				|  |  | +  resource_user->links[list].prev->links[list].next =
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				|  |  | +      resource_user->links[list].next;
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				|  |  | +}
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				|  |  | +
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				|  |  | +/*******************************************************************************
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				|  |  | + * buffer pool state machine
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				|  |  | + */
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				|  |  | +
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				|  |  | +static bool bpalloc(grpc_exec_ctx *exec_ctx,
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				|  |  | +                    grpc_resource_quota *resource_quota);
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				|  |  | +static bool bpscavenge(grpc_exec_ctx *exec_ctx,
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				|  |  | +                       grpc_resource_quota *resource_quota);
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				|  |  | +static bool bpreclaim(grpc_exec_ctx *exec_ctx,
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				|  |  | +                      grpc_resource_quota *resource_quota, bool destructive);
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				|  |  | +
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				|  |  | +static void bpstep(grpc_exec_ctx *exec_ctx, void *bp, grpc_error *error) {
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				|  |  | +  grpc_resource_quota *resource_quota = bp;
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				|  |  | +  resource_quota->step_scheduled = false;
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				|  |  | +  do {
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				|  |  | +    if (bpalloc(exec_ctx, resource_quota)) goto done;
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				|  |  | +  } while (bpscavenge(exec_ctx, resource_quota));
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				|  |  | +  bpreclaim(exec_ctx, resource_quota, false) ||
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				|  |  | +      bpreclaim(exec_ctx, resource_quota, true);
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				|  |  | +done:
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				|  |  | +  grpc_resource_quota_internal_unref(exec_ctx, resource_quota);
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				|  |  | +}
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				|  |  | +
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				|  |  | +static void bpstep_sched(grpc_exec_ctx *exec_ctx,
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				|  |  | +                         grpc_resource_quota *resource_quota) {
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				|  |  | +  if (resource_quota->step_scheduled) return;
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				|  |  | +  resource_quota->step_scheduled = true;
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				|  |  | +  grpc_resource_quota_internal_ref(resource_quota);
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				|  |  | +  grpc_combiner_execute_finally(exec_ctx, resource_quota->combiner,
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				|  |  | +                                &resource_quota->bpstep_closure,
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				|  |  | +                                GRPC_ERROR_NONE, false);
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				|  |  | +}
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				|  |  | +
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				|  |  | +/* returns true if all allocations are completed */
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				|  |  | +static bool bpalloc(grpc_exec_ctx *exec_ctx,
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				|  |  | +                    grpc_resource_quota *resource_quota) {
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				|  |  | +  grpc_resource_user *resource_user;
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				|  |  | +  while ((resource_user =
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				|  |  | +              bulist_pop(resource_quota, GRPC_BULIST_AWAITING_ALLOCATION))) {
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				|  |  | +    gpr_mu_lock(&resource_user->mu);
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				|  |  | +    if (resource_user->free_pool < 0 &&
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				|  |  | +        -resource_user->free_pool <= resource_quota->free_pool) {
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				|  |  | +      int64_t amt = -resource_user->free_pool;
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				|  |  | +      resource_user->free_pool = 0;
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				|  |  | +      resource_quota->free_pool -= amt;
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				|  |  | +      if (grpc_resource_quota_trace) {
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				|  |  | +        gpr_log(GPR_DEBUG, "BP %s %s: grant alloc %" PRId64
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				|  |  | +                           " bytes; bp_free_pool -> %" PRId64,
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				|  |  | +                resource_quota->name, resource_user->name, amt,
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				|  |  | +                resource_quota->free_pool);
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				|  |  | +      }
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				|  |  | +    } else if (grpc_resource_quota_trace && resource_user->free_pool >= 0) {
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				|  |  | +      gpr_log(GPR_DEBUG, "BP %s %s: discard already satisfied alloc request",
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				|  |  | +              resource_quota->name, resource_user->name);
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				|  |  | +    }
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				|  |  | +    if (resource_user->free_pool >= 0) {
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				|  |  | +      resource_user->allocating = false;
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				|  |  | +      grpc_exec_ctx_enqueue_list(exec_ctx, &resource_user->on_allocated, NULL);
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				|  |  | +      gpr_mu_unlock(&resource_user->mu);
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				|  |  | +    } else {
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				|  |  | +      bulist_add_head(resource_user, GRPC_BULIST_AWAITING_ALLOCATION);
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				|  |  | +      gpr_mu_unlock(&resource_user->mu);
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				|  |  | +      return false;
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				|  |  | +    }
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				|  |  | +  }
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				|  |  | +  return true;
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				|  |  | +}
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				|  |  | +
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				|  |  | +/* returns true if any memory could be reclaimed from buffers */
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				|  |  | +static bool bpscavenge(grpc_exec_ctx *exec_ctx,
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				|  |  | +                       grpc_resource_quota *resource_quota) {
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				|  |  | +  grpc_resource_user *resource_user;
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				|  |  | +  while ((resource_user =
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				|  |  | +              bulist_pop(resource_quota, GRPC_BULIST_NON_EMPTY_FREE_POOL))) {
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				|  |  | +    gpr_mu_lock(&resource_user->mu);
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				|  |  | +    if (resource_user->free_pool > 0) {
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				|  |  | +      int64_t amt = resource_user->free_pool;
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				|  |  | +      resource_user->free_pool = 0;
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				|  |  | +      resource_quota->free_pool += amt;
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				|  |  | +      if (grpc_resource_quota_trace) {
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				|  |  | +        gpr_log(GPR_DEBUG, "BP %s %s: scavenge %" PRId64
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				|  |  | +                           " bytes; bp_free_pool -> %" PRId64,
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				|  |  | +                resource_quota->name, resource_user->name, amt,
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				|  |  | +                resource_quota->free_pool);
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				|  |  | +      }
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				|  |  | +      gpr_mu_unlock(&resource_user->mu);
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				|  |  | +      return true;
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				|  |  | +    } else {
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				|  |  | +      gpr_mu_unlock(&resource_user->mu);
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				|  |  | +    }
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				|  |  | +  }
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				|  |  | +  return false;
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				|  |  | +}
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				|  |  | +
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				|  |  | +/* returns true if reclaimation is proceeding */
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				|  |  | +static bool bpreclaim(grpc_exec_ctx *exec_ctx,
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				|  |  | +                      grpc_resource_quota *resource_quota, bool destructive) {
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				|  |  | +  if (resource_quota->reclaiming) return true;
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				|  |  | +  grpc_bulist list = destructive ? GRPC_BULIST_RECLAIMER_DESTRUCTIVE
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				|  |  | +                                 : GRPC_BULIST_RECLAIMER_BENIGN;
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				|  |  | +  grpc_resource_user *resource_user = bulist_pop(resource_quota, list);
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				|  |  | +  if (resource_user == NULL) return false;
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				|  |  | +  if (grpc_resource_quota_trace) {
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				|  |  | +    gpr_log(GPR_DEBUG, "BP %s %s: initiate %s reclaimation",
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				|  |  | +            resource_quota->name, resource_user->name,
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				|  |  | +            destructive ? "destructive" : "benign");
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				|  |  | +  }
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				|  |  | +  resource_quota->reclaiming = true;
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				|  |  | +  grpc_resource_quota_internal_ref(resource_quota);
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				|  |  | +  grpc_closure *c = resource_user->reclaimers[destructive];
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				|  |  | +  resource_user->reclaimers[destructive] = NULL;
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				|  |  | +  grpc_closure_run(exec_ctx, c, GRPC_ERROR_NONE);
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				|  |  | +  return true;
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				|  |  | +}
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				|  |  | +
 | 
	
		
			
				|  |  | +/*******************************************************************************
 | 
	
		
			
				|  |  | + * bu_slice: a slice implementation that is backed by a grpc_resource_user
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				|  |  | + */
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				|  |  | +
 | 
	
		
			
				|  |  | +typedef struct {
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				|  |  | +  gpr_slice_refcount base;
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				|  |  | +  gpr_refcount refs;
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				|  |  | +  grpc_resource_user *resource_user;
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				|  |  | +  size_t size;
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				|  |  | +} bu_slice_refcount;
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				|  |  | +
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				|  |  | +static void bu_slice_ref(void *p) {
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				|  |  | +  bu_slice_refcount *rc = p;
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				|  |  | +  gpr_ref(&rc->refs);
 | 
	
		
			
				|  |  | +}
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				|  |  | +
 | 
	
		
			
				|  |  | +static void bu_slice_unref(void *p) {
 | 
	
		
			
				|  |  | +  bu_slice_refcount *rc = p;
 | 
	
		
			
				|  |  | +  if (gpr_unref(&rc->refs)) {
 | 
	
		
			
				|  |  | +    /* TODO(ctiller): this is dangerous, but I think safe for now:
 | 
	
		
			
				|  |  | +       we have no guarantee here that we're at a safe point for creating an
 | 
	
		
			
				|  |  | +       execution context, but we have no way of writing this code otherwise.
 | 
	
		
			
				|  |  | +       In the future: consider lifting gpr_slice to grpc, and offering an
 | 
	
		
			
				|  |  | +       internal_{ref,unref} pair that is execution context aware. Alternatively,
 | 
	
		
			
				|  |  | +       make exec_ctx be thread local and 'do the right thing' (whatever that is)
 | 
	
		
			
				|  |  | +       if NULL */
 | 
	
		
			
				|  |  | +    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 | 
	
		
			
				|  |  | +    grpc_resource_user_free(&exec_ctx, rc->resource_user, rc->size);
 | 
	
		
			
				|  |  | +    grpc_exec_ctx_finish(&exec_ctx);
 | 
	
		
			
				|  |  | +    gpr_free(rc);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static gpr_slice bu_slice_create(grpc_resource_user *resource_user,
 | 
	
		
			
				|  |  | +                                 size_t size) {
 | 
	
		
			
				|  |  | +  bu_slice_refcount *rc = gpr_malloc(sizeof(bu_slice_refcount) + size);
 | 
	
		
			
				|  |  | +  rc->base.ref = bu_slice_ref;
 | 
	
		
			
				|  |  | +  rc->base.unref = bu_slice_unref;
 | 
	
		
			
				|  |  | +  gpr_ref_init(&rc->refs, 1);
 | 
	
		
			
				|  |  | +  rc->resource_user = resource_user;
 | 
	
		
			
				|  |  | +  rc->size = size;
 | 
	
		
			
				|  |  | +  gpr_slice slice;
 | 
	
		
			
				|  |  | +  slice.refcount = &rc->base;
 | 
	
		
			
				|  |  | +  slice.data.refcounted.bytes = (uint8_t *)(rc + 1);
 | 
	
		
			
				|  |  | +  slice.data.refcounted.length = size;
 | 
	
		
			
				|  |  | +  return slice;
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +/*******************************************************************************
 | 
	
		
			
				|  |  | + * grpc_resource_quota internal implementation
 | 
	
		
			
				|  |  | + */
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static void bu_allocate(grpc_exec_ctx *exec_ctx, void *bu, grpc_error *error) {
 | 
	
		
			
				|  |  | +  grpc_resource_user *resource_user = bu;
 | 
	
		
			
				|  |  | +  if (bulist_empty(resource_user->resource_quota,
 | 
	
		
			
				|  |  | +                   GRPC_BULIST_AWAITING_ALLOCATION)) {
 | 
	
		
			
				|  |  | +    bpstep_sched(exec_ctx, resource_user->resource_quota);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  bulist_add_tail(resource_user, GRPC_BULIST_AWAITING_ALLOCATION);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static void bu_add_to_free_pool(grpc_exec_ctx *exec_ctx, void *bu,
 | 
	
		
			
				|  |  | +                                grpc_error *error) {
 | 
	
		
			
				|  |  | +  grpc_resource_user *resource_user = bu;
 | 
	
		
			
				|  |  | +  if (!bulist_empty(resource_user->resource_quota,
 | 
	
		
			
				|  |  | +                    GRPC_BULIST_AWAITING_ALLOCATION) &&
 | 
	
		
			
				|  |  | +      bulist_empty(resource_user->resource_quota,
 | 
	
		
			
				|  |  | +                   GRPC_BULIST_NON_EMPTY_FREE_POOL)) {
 | 
	
		
			
				|  |  | +    bpstep_sched(exec_ctx, resource_user->resource_quota);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  bulist_add_tail(resource_user, GRPC_BULIST_NON_EMPTY_FREE_POOL);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static void bu_post_benign_reclaimer(grpc_exec_ctx *exec_ctx, void *bu,
 | 
	
		
			
				|  |  | +                                     grpc_error *error) {
 | 
	
		
			
				|  |  | +  grpc_resource_user *resource_user = bu;
 | 
	
		
			
				|  |  | +  if (!bulist_empty(resource_user->resource_quota,
 | 
	
		
			
				|  |  | +                    GRPC_BULIST_AWAITING_ALLOCATION) &&
 | 
	
		
			
				|  |  | +      bulist_empty(resource_user->resource_quota,
 | 
	
		
			
				|  |  | +                   GRPC_BULIST_NON_EMPTY_FREE_POOL) &&
 | 
	
		
			
				|  |  | +      bulist_empty(resource_user->resource_quota,
 | 
	
		
			
				|  |  | +                   GRPC_BULIST_RECLAIMER_BENIGN)) {
 | 
	
		
			
				|  |  | +    bpstep_sched(exec_ctx, resource_user->resource_quota);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  bulist_add_tail(resource_user, GRPC_BULIST_RECLAIMER_BENIGN);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static void bu_post_destructive_reclaimer(grpc_exec_ctx *exec_ctx, void *bu,
 | 
	
		
			
				|  |  | +                                          grpc_error *error) {
 | 
	
		
			
				|  |  | +  grpc_resource_user *resource_user = bu;
 | 
	
		
			
				|  |  | +  if (!bulist_empty(resource_user->resource_quota,
 | 
	
		
			
				|  |  | +                    GRPC_BULIST_AWAITING_ALLOCATION) &&
 | 
	
		
			
				|  |  | +      bulist_empty(resource_user->resource_quota,
 | 
	
		
			
				|  |  | +                   GRPC_BULIST_NON_EMPTY_FREE_POOL) &&
 | 
	
		
			
				|  |  | +      bulist_empty(resource_user->resource_quota,
 | 
	
		
			
				|  |  | +                   GRPC_BULIST_RECLAIMER_BENIGN) &&
 | 
	
		
			
				|  |  | +      bulist_empty(resource_user->resource_quota,
 | 
	
		
			
				|  |  | +                   GRPC_BULIST_RECLAIMER_DESTRUCTIVE)) {
 | 
	
		
			
				|  |  | +    bpstep_sched(exec_ctx, resource_user->resource_quota);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  bulist_add_tail(resource_user, GRPC_BULIST_RECLAIMER_DESTRUCTIVE);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static void bu_destroy(grpc_exec_ctx *exec_ctx, void *bu, grpc_error *error) {
 | 
	
		
			
				|  |  | +  grpc_resource_user *resource_user = bu;
 | 
	
		
			
				|  |  | +  GPR_ASSERT(resource_user->allocated == 0);
 | 
	
		
			
				|  |  | +  for (int i = 0; i < GRPC_BULIST_COUNT; i++) {
 | 
	
		
			
				|  |  | +    bulist_remove(resource_user, (grpc_bulist)i);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  grpc_exec_ctx_sched(exec_ctx, resource_user->reclaimers[0],
 | 
	
		
			
				|  |  | +                      GRPC_ERROR_CANCELLED, NULL);
 | 
	
		
			
				|  |  | +  grpc_exec_ctx_sched(exec_ctx, resource_user->reclaimers[1],
 | 
	
		
			
				|  |  | +                      GRPC_ERROR_CANCELLED, NULL);
 | 
	
		
			
				|  |  | +  grpc_exec_ctx_sched(exec_ctx, (grpc_closure *)gpr_atm_no_barrier_load(
 | 
	
		
			
				|  |  | +                                    &resource_user->on_done_destroy_closure),
 | 
	
		
			
				|  |  | +                      GRPC_ERROR_NONE, NULL);
 | 
	
		
			
				|  |  | +  if (resource_user->free_pool != 0) {
 | 
	
		
			
				|  |  | +    resource_user->resource_quota->free_pool += resource_user->free_pool;
 | 
	
		
			
				|  |  | +    bpstep_sched(exec_ctx, resource_user->resource_quota);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static void bu_allocated_slices(grpc_exec_ctx *exec_ctx, void *ts,
 | 
	
		
			
				|  |  | +                                grpc_error *error) {
 | 
	
		
			
				|  |  | +  grpc_resource_user_slice_allocator *slice_allocator = ts;
 | 
	
		
			
				|  |  | +  if (error == GRPC_ERROR_NONE) {
 | 
	
		
			
				|  |  | +    for (size_t i = 0; i < slice_allocator->count; i++) {
 | 
	
		
			
				|  |  | +      gpr_slice_buffer_add_indexed(
 | 
	
		
			
				|  |  | +          slice_allocator->dest, bu_slice_create(slice_allocator->resource_user,
 | 
	
		
			
				|  |  | +                                                 slice_allocator->length));
 | 
	
		
			
				|  |  | +    }
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  grpc_closure_run(exec_ctx, &slice_allocator->on_done, GRPC_ERROR_REF(error));
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +typedef struct {
 | 
	
		
			
				|  |  | +  int64_t size;
 | 
	
		
			
				|  |  | +  grpc_resource_quota *resource_quota;
 | 
	
		
			
				|  |  | +  grpc_closure closure;
 | 
	
		
			
				|  |  | +} bp_resize_args;
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static void bp_resize(grpc_exec_ctx *exec_ctx, void *args, grpc_error *error) {
 | 
	
		
			
				|  |  | +  bp_resize_args *a = args;
 | 
	
		
			
				|  |  | +  int64_t delta = a->size - a->resource_quota->size;
 | 
	
		
			
				|  |  | +  a->resource_quota->size += delta;
 | 
	
		
			
				|  |  | +  a->resource_quota->free_pool += delta;
 | 
	
		
			
				|  |  | +  if (delta < 0 && a->resource_quota->free_pool < 0) {
 | 
	
		
			
				|  |  | +    bpstep_sched(exec_ctx, a->resource_quota);
 | 
	
		
			
				|  |  | +  } else if (delta > 0 &&
 | 
	
		
			
				|  |  | +             !bulist_empty(a->resource_quota,
 | 
	
		
			
				|  |  | +                           GRPC_BULIST_AWAITING_ALLOCATION)) {
 | 
	
		
			
				|  |  | +    bpstep_sched(exec_ctx, a->resource_quota);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  grpc_resource_quota_internal_unref(exec_ctx, a->resource_quota);
 | 
	
		
			
				|  |  | +  gpr_free(a);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static void bp_reclaimation_done(grpc_exec_ctx *exec_ctx, void *bp,
 | 
	
		
			
				|  |  | +                                 grpc_error *error) {
 | 
	
		
			
				|  |  | +  grpc_resource_quota *resource_quota = bp;
 | 
	
		
			
				|  |  | +  resource_quota->reclaiming = false;
 | 
	
		
			
				|  |  | +  bpstep_sched(exec_ctx, resource_quota);
 | 
	
		
			
				|  |  | +  grpc_resource_quota_internal_unref(exec_ctx, resource_quota);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +/*******************************************************************************
 | 
	
		
			
				|  |  | + * grpc_resource_quota api
 | 
	
		
			
				|  |  | + */
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +grpc_resource_quota *grpc_resource_quota_create(const char *name) {
 | 
	
		
			
				|  |  | +  grpc_resource_quota *resource_quota = gpr_malloc(sizeof(*resource_quota));
 | 
	
		
			
				|  |  | +  gpr_ref_init(&resource_quota->refs, 1);
 | 
	
		
			
				|  |  | +  resource_quota->combiner = grpc_combiner_create(NULL);
 | 
	
		
			
				|  |  | +  resource_quota->free_pool = INT64_MAX;
 | 
	
		
			
				|  |  | +  resource_quota->size = INT64_MAX;
 | 
	
		
			
				|  |  | +  resource_quota->step_scheduled = false;
 | 
	
		
			
				|  |  | +  resource_quota->reclaiming = false;
 | 
	
		
			
				|  |  | +  if (name != NULL) {
 | 
	
		
			
				|  |  | +    resource_quota->name = gpr_strdup(name);
 | 
	
		
			
				|  |  | +  } else {
 | 
	
		
			
				|  |  | +    gpr_asprintf(&resource_quota->name, "anonymous_pool_%" PRIxPTR,
 | 
	
		
			
				|  |  | +                 (intptr_t)resource_quota);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  grpc_closure_init(&resource_quota->bpstep_closure, bpstep, resource_quota);
 | 
	
		
			
				|  |  | +  grpc_closure_init(&resource_quota->bpreclaimation_done_closure,
 | 
	
		
			
				|  |  | +                    bp_reclaimation_done, resource_quota);
 | 
	
		
			
				|  |  | +  for (int i = 0; i < GRPC_BULIST_COUNT; i++) {
 | 
	
		
			
				|  |  | +    resource_quota->roots[i] = NULL;
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  return resource_quota;
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +void grpc_resource_quota_internal_unref(grpc_exec_ctx *exec_ctx,
 | 
	
		
			
				|  |  | +                                        grpc_resource_quota *resource_quota) {
 | 
	
		
			
				|  |  | +  if (gpr_unref(&resource_quota->refs)) {
 | 
	
		
			
				|  |  | +    grpc_combiner_destroy(exec_ctx, resource_quota->combiner);
 | 
	
		
			
				|  |  | +    gpr_free(resource_quota->name);
 | 
	
		
			
				|  |  | +    gpr_free(resource_quota);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +void grpc_resource_quota_unref(grpc_resource_quota *resource_quota) {
 | 
	
		
			
				|  |  | +  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 | 
	
		
			
				|  |  | +  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
 | 
	
		
			
				|  |  | +  grpc_exec_ctx_finish(&exec_ctx);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +grpc_resource_quota *grpc_resource_quota_internal_ref(
 | 
	
		
			
				|  |  | +    grpc_resource_quota *resource_quota) {
 | 
	
		
			
				|  |  | +  gpr_ref(&resource_quota->refs);
 | 
	
		
			
				|  |  | +  return resource_quota;
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +void grpc_resource_quota_ref(grpc_resource_quota *resource_quota) {
 | 
	
		
			
				|  |  | +  grpc_resource_quota_internal_ref(resource_quota);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +void grpc_resource_quota_resize(grpc_resource_quota *resource_quota,
 | 
	
		
			
				|  |  | +                                size_t size) {
 | 
	
		
			
				|  |  | +  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 | 
	
		
			
				|  |  | +  bp_resize_args *a = gpr_malloc(sizeof(*a));
 | 
	
		
			
				|  |  | +  a->resource_quota = grpc_resource_quota_internal_ref(resource_quota);
 | 
	
		
			
				|  |  | +  a->size = (int64_t)size;
 | 
	
		
			
				|  |  | +  grpc_closure_init(&a->closure, bp_resize, a);
 | 
	
		
			
				|  |  | +  grpc_combiner_execute(&exec_ctx, resource_quota->combiner, &a->closure,
 | 
	
		
			
				|  |  | +                        GRPC_ERROR_NONE, false);
 | 
	
		
			
				|  |  | +  grpc_exec_ctx_finish(&exec_ctx);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +/*******************************************************************************
 | 
	
		
			
				|  |  | + * grpc_resource_user channel args api
 | 
	
		
			
				|  |  | + */
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +grpc_resource_quota *grpc_resource_quota_from_channel_args(
 | 
	
		
			
				|  |  | +    const grpc_channel_args *channel_args) {
 | 
	
		
			
				|  |  | +  for (size_t i = 0; i < channel_args->num_args; i++) {
 | 
	
		
			
				|  |  | +    if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_BUFFER_POOL)) {
 | 
	
		
			
				|  |  | +      if (channel_args->args[i].type == GRPC_ARG_POINTER) {
 | 
	
		
			
				|  |  | +        return grpc_resource_quota_internal_ref(
 | 
	
		
			
				|  |  | +            channel_args->args[i].value.pointer.p);
 | 
	
		
			
				|  |  | +      } else {
 | 
	
		
			
				|  |  | +        gpr_log(GPR_DEBUG, GRPC_ARG_BUFFER_POOL " should be a pointer");
 | 
	
		
			
				|  |  | +      }
 | 
	
		
			
				|  |  | +    }
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  return grpc_resource_quota_create(NULL);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static void *bp_copy(void *bp) {
 | 
	
		
			
				|  |  | +  grpc_resource_quota_ref(bp);
 | 
	
		
			
				|  |  | +  return bp;
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static void bp_destroy(void *bp) { grpc_resource_quota_unref(bp); }
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static int bp_cmp(void *a, void *b) { return GPR_ICMP(a, b); }
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +const grpc_arg_pointer_vtable *grpc_resource_quota_arg_vtable(void) {
 | 
	
		
			
				|  |  | +  static const grpc_arg_pointer_vtable vtable = {bp_copy, bp_destroy, bp_cmp};
 | 
	
		
			
				|  |  | +  return &vtable;
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +/*******************************************************************************
 | 
	
		
			
				|  |  | + * grpc_resource_user api
 | 
	
		
			
				|  |  | + */
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +void grpc_resource_user_init(grpc_resource_user *resource_user,
 | 
	
		
			
				|  |  | +                             grpc_resource_quota *resource_quota,
 | 
	
		
			
				|  |  | +                             const char *name) {
 | 
	
		
			
				|  |  | +  resource_user->resource_quota =
 | 
	
		
			
				|  |  | +      grpc_resource_quota_internal_ref(resource_quota);
 | 
	
		
			
				|  |  | +  grpc_closure_init(&resource_user->allocate_closure, &bu_allocate,
 | 
	
		
			
				|  |  | +                    resource_user);
 | 
	
		
			
				|  |  | +  grpc_closure_init(&resource_user->add_to_free_pool_closure,
 | 
	
		
			
				|  |  | +                    &bu_add_to_free_pool, resource_user);
 | 
	
		
			
				|  |  | +  grpc_closure_init(&resource_user->post_reclaimer_closure[0],
 | 
	
		
			
				|  |  | +                    &bu_post_benign_reclaimer, resource_user);
 | 
	
		
			
				|  |  | +  grpc_closure_init(&resource_user->post_reclaimer_closure[1],
 | 
	
		
			
				|  |  | +                    &bu_post_destructive_reclaimer, resource_user);
 | 
	
		
			
				|  |  | +  grpc_closure_init(&resource_user->destroy_closure, &bu_destroy,
 | 
	
		
			
				|  |  | +                    resource_user);
 | 
	
		
			
				|  |  | +  gpr_mu_init(&resource_user->mu);
 | 
	
		
			
				|  |  | +  resource_user->allocated = 0;
 | 
	
		
			
				|  |  | +  resource_user->free_pool = 0;
 | 
	
		
			
				|  |  | +  grpc_closure_list_init(&resource_user->on_allocated);
 | 
	
		
			
				|  |  | +  resource_user->allocating = false;
 | 
	
		
			
				|  |  | +  resource_user->added_to_free_pool = false;
 | 
	
		
			
				|  |  | +  gpr_atm_no_barrier_store(&resource_user->on_done_destroy_closure, 0);
 | 
	
		
			
				|  |  | +  resource_user->reclaimers[0] = NULL;
 | 
	
		
			
				|  |  | +  resource_user->reclaimers[1] = NULL;
 | 
	
		
			
				|  |  | +  for (int i = 0; i < GRPC_BULIST_COUNT; i++) {
 | 
	
		
			
				|  |  | +    resource_user->links[i].next = resource_user->links[i].prev = NULL;
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +#ifndef NDEBUG
 | 
	
		
			
				|  |  | +  resource_user->asan_canary = gpr_malloc(1);
 | 
	
		
			
				|  |  | +#endif
 | 
	
		
			
				|  |  | +  if (name != NULL) {
 | 
	
		
			
				|  |  | +    resource_user->name = gpr_strdup(name);
 | 
	
		
			
				|  |  | +  } else {
 | 
	
		
			
				|  |  | +    gpr_asprintf(&resource_user->name, "anonymous_resource_user_%" PRIxPTR,
 | 
	
		
			
				|  |  | +                 (intptr_t)resource_user);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +void grpc_resource_user_shutdown(grpc_exec_ctx *exec_ctx,
 | 
	
		
			
				|  |  | +                                 grpc_resource_user *resource_user,
 | 
	
		
			
				|  |  | +                                 grpc_closure *on_done) {
 | 
	
		
			
				|  |  | +  gpr_mu_lock(&resource_user->mu);
 | 
	
		
			
				|  |  | +  GPR_ASSERT(gpr_atm_no_barrier_load(&resource_user->on_done_destroy_closure) ==
 | 
	
		
			
				|  |  | +             0);
 | 
	
		
			
				|  |  | +  gpr_atm_no_barrier_store(&resource_user->on_done_destroy_closure,
 | 
	
		
			
				|  |  | +                           (gpr_atm)on_done);
 | 
	
		
			
				|  |  | +  if (resource_user->allocated == 0) {
 | 
	
		
			
				|  |  | +    grpc_combiner_execute(exec_ctx, resource_user->resource_quota->combiner,
 | 
	
		
			
				|  |  | +                          &resource_user->destroy_closure, GRPC_ERROR_NONE,
 | 
	
		
			
				|  |  | +                          false);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  gpr_mu_unlock(&resource_user->mu);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +void grpc_resource_user_destroy(grpc_exec_ctx *exec_ctx,
 | 
	
		
			
				|  |  | +                                grpc_resource_user *resource_user) {
 | 
	
		
			
				|  |  | +#ifndef NDEBUG
 | 
	
		
			
				|  |  | +  gpr_free(resource_user->asan_canary);
 | 
	
		
			
				|  |  | +#endif
 | 
	
		
			
				|  |  | +  grpc_resource_quota_internal_unref(exec_ctx, resource_user->resource_quota);
 | 
	
		
			
				|  |  | +  gpr_mu_destroy(&resource_user->mu);
 | 
	
		
			
				|  |  | +  gpr_free(resource_user->name);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +void grpc_resource_user_alloc(grpc_exec_ctx *exec_ctx,
 | 
	
		
			
				|  |  | +                              grpc_resource_user *resource_user, size_t size,
 | 
	
		
			
				|  |  | +                              grpc_closure *optional_on_done) {
 | 
	
		
			
				|  |  | +  gpr_mu_lock(&resource_user->mu);
 | 
	
		
			
				|  |  | +  grpc_closure *on_done_destroy = (grpc_closure *)gpr_atm_no_barrier_load(
 | 
	
		
			
				|  |  | +      &resource_user->on_done_destroy_closure);
 | 
	
		
			
				|  |  | +  if (on_done_destroy != NULL) {
 | 
	
		
			
				|  |  | +    /* already shutdown */
 | 
	
		
			
				|  |  | +    if (grpc_resource_quota_trace) {
 | 
	
		
			
				|  |  | +      gpr_log(GPR_DEBUG, "BP %s %s: alloc %" PRIdPTR " after shutdown",
 | 
	
		
			
				|  |  | +              resource_user->resource_quota->name, resource_user->name, size);
 | 
	
		
			
				|  |  | +    }
 | 
	
		
			
				|  |  | +    grpc_exec_ctx_sched(
 | 
	
		
			
				|  |  | +        exec_ctx, optional_on_done,
 | 
	
		
			
				|  |  | +        GRPC_ERROR_CREATE("Buffer pool user is already shutdown"), NULL);
 | 
	
		
			
				|  |  | +    gpr_mu_unlock(&resource_user->mu);
 | 
	
		
			
				|  |  | +    return;
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  resource_user->allocated += (int64_t)size;
 | 
	
		
			
				|  |  | +  resource_user->free_pool -= (int64_t)size;
 | 
	
		
			
				|  |  | +  if (grpc_resource_quota_trace) {
 | 
	
		
			
				|  |  | +    gpr_log(GPR_DEBUG, "BP %s %s: alloc %" PRIdPTR "; allocated -> %" PRId64
 | 
	
		
			
				|  |  | +                       ", free_pool -> %" PRId64,
 | 
	
		
			
				|  |  | +            resource_user->resource_quota->name, resource_user->name, size,
 | 
	
		
			
				|  |  | +            resource_user->allocated, resource_user->free_pool);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  if (resource_user->free_pool < 0) {
 | 
	
		
			
				|  |  | +    grpc_closure_list_append(&resource_user->on_allocated, optional_on_done,
 | 
	
		
			
				|  |  | +                             GRPC_ERROR_NONE);
 | 
	
		
			
				|  |  | +    if (!resource_user->allocating) {
 | 
	
		
			
				|  |  | +      resource_user->allocating = true;
 | 
	
		
			
				|  |  | +      grpc_combiner_execute(exec_ctx, resource_user->resource_quota->combiner,
 | 
	
		
			
				|  |  | +                            &resource_user->allocate_closure, GRPC_ERROR_NONE,
 | 
	
		
			
				|  |  | +                            false);
 | 
	
		
			
				|  |  | +    }
 | 
	
		
			
				|  |  | +  } else {
 | 
	
		
			
				|  |  | +    grpc_exec_ctx_sched(exec_ctx, optional_on_done, GRPC_ERROR_NONE, NULL);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  gpr_mu_unlock(&resource_user->mu);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +void grpc_resource_user_free(grpc_exec_ctx *exec_ctx,
 | 
	
		
			
				|  |  | +                             grpc_resource_user *resource_user, size_t size) {
 | 
	
		
			
				|  |  | +  gpr_mu_lock(&resource_user->mu);
 | 
	
		
			
				|  |  | +  GPR_ASSERT(resource_user->allocated >= (int64_t)size);
 | 
	
		
			
				|  |  | +  bool was_zero_or_negative = resource_user->free_pool <= 0;
 | 
	
		
			
				|  |  | +  resource_user->free_pool += (int64_t)size;
 | 
	
		
			
				|  |  | +  resource_user->allocated -= (int64_t)size;
 | 
	
		
			
				|  |  | +  if (grpc_resource_quota_trace) {
 | 
	
		
			
				|  |  | +    gpr_log(GPR_DEBUG, "BP %s %s: free %" PRIdPTR "; allocated -> %" PRId64
 | 
	
		
			
				|  |  | +                       ", free_pool -> %" PRId64,
 | 
	
		
			
				|  |  | +            resource_user->resource_quota->name, resource_user->name, size,
 | 
	
		
			
				|  |  | +            resource_user->allocated, resource_user->free_pool);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  bool is_bigger_than_zero = resource_user->free_pool > 0;
 | 
	
		
			
				|  |  | +  if (is_bigger_than_zero && was_zero_or_negative &&
 | 
	
		
			
				|  |  | +      !resource_user->added_to_free_pool) {
 | 
	
		
			
				|  |  | +    resource_user->added_to_free_pool = true;
 | 
	
		
			
				|  |  | +    grpc_combiner_execute(exec_ctx, resource_user->resource_quota->combiner,
 | 
	
		
			
				|  |  | +                          &resource_user->add_to_free_pool_closure,
 | 
	
		
			
				|  |  | +                          GRPC_ERROR_NONE, false);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  grpc_closure *on_done_destroy = (grpc_closure *)gpr_atm_no_barrier_load(
 | 
	
		
			
				|  |  | +      &resource_user->on_done_destroy_closure);
 | 
	
		
			
				|  |  | +  if (on_done_destroy != NULL && resource_user->allocated == 0) {
 | 
	
		
			
				|  |  | +    grpc_combiner_execute(exec_ctx, resource_user->resource_quota->combiner,
 | 
	
		
			
				|  |  | +                          &resource_user->destroy_closure, GRPC_ERROR_NONE,
 | 
	
		
			
				|  |  | +                          false);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  gpr_mu_unlock(&resource_user->mu);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +void grpc_resource_user_post_reclaimer(grpc_exec_ctx *exec_ctx,
 | 
	
		
			
				|  |  | +                                       grpc_resource_user *resource_user,
 | 
	
		
			
				|  |  | +                                       bool destructive,
 | 
	
		
			
				|  |  | +                                       grpc_closure *closure) {
 | 
	
		
			
				|  |  | +  if (gpr_atm_acq_load(&resource_user->on_done_destroy_closure) == 0) {
 | 
	
		
			
				|  |  | +    GPR_ASSERT(resource_user->reclaimers[destructive] == NULL);
 | 
	
		
			
				|  |  | +    resource_user->reclaimers[destructive] = closure;
 | 
	
		
			
				|  |  | +    grpc_combiner_execute(exec_ctx, resource_user->resource_quota->combiner,
 | 
	
		
			
				|  |  | +                          &resource_user->post_reclaimer_closure[destructive],
 | 
	
		
			
				|  |  | +                          GRPC_ERROR_NONE, false);
 | 
	
		
			
				|  |  | +  } else {
 | 
	
		
			
				|  |  | +    grpc_exec_ctx_sched(exec_ctx, closure, GRPC_ERROR_CANCELLED, NULL);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +void grpc_resource_user_finish_reclaimation(grpc_exec_ctx *exec_ctx,
 | 
	
		
			
				|  |  | +                                            grpc_resource_user *resource_user) {
 | 
	
		
			
				|  |  | +  if (grpc_resource_quota_trace) {
 | 
	
		
			
				|  |  | +    gpr_log(GPR_DEBUG, "BP %s %s: reclaimation complete",
 | 
	
		
			
				|  |  | +            resource_user->resource_quota->name, resource_user->name);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  grpc_combiner_execute(
 | 
	
		
			
				|  |  | +      exec_ctx, resource_user->resource_quota->combiner,
 | 
	
		
			
				|  |  | +      &resource_user->resource_quota->bpreclaimation_done_closure,
 | 
	
		
			
				|  |  | +      GRPC_ERROR_NONE, false);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +void grpc_resource_user_slice_allocator_init(
 | 
	
		
			
				|  |  | +    grpc_resource_user_slice_allocator *slice_allocator,
 | 
	
		
			
				|  |  | +    grpc_resource_user *resource_user, grpc_iomgr_cb_func cb, void *p) {
 | 
	
		
			
				|  |  | +  grpc_closure_init(&slice_allocator->on_allocated, bu_allocated_slices,
 | 
	
		
			
				|  |  | +                    slice_allocator);
 | 
	
		
			
				|  |  | +  grpc_closure_init(&slice_allocator->on_done, cb, p);
 | 
	
		
			
				|  |  | +  slice_allocator->resource_user = resource_user;
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +void grpc_resource_user_alloc_slices(
 | 
	
		
			
				|  |  | +    grpc_exec_ctx *exec_ctx,
 | 
	
		
			
				|  |  | +    grpc_resource_user_slice_allocator *slice_allocator, size_t length,
 | 
	
		
			
				|  |  | +    size_t count, gpr_slice_buffer *dest) {
 | 
	
		
			
				|  |  | +  slice_allocator->length = length;
 | 
	
		
			
				|  |  | +  slice_allocator->count = count;
 | 
	
		
			
				|  |  | +  slice_allocator->dest = dest;
 | 
	
		
			
				|  |  | +  grpc_resource_user_alloc(exec_ctx, slice_allocator->resource_user,
 | 
	
		
			
				|  |  | +                           count * length, &slice_allocator->on_allocated);
 | 
	
		
			
				|  |  | +}
 |