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				|  |  | +/*
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				|  |  | + *
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				|  |  | + * Copyright 2015 gRPC authors.
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				|  |  | + *
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				|  |  | + * Licensed under the Apache License, Version 2.0 (the "License");
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				|  |  | + * you may not use this file except in compliance with the License.
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				|  |  | + * You may obtain a copy of the License at
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				|  |  | + *
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				|  |  | + *     http://www.apache.org/licenses/LICENSE-2.0
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				|  |  | + *
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				|  |  | + * Unless required by applicable law or agreed to in writing, software
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				|  |  | + * distributed under the License is distributed on an "AS IS" BASIS,
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				|  |  | + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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				|  |  | + * See the License for the specific language governing permissions and
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				|  |  | + * limitations under the License.
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				|  |  | + *
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				|  |  | + */
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				|  |  | +
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				|  |  | +#include <grpc/support/port_platform.h>
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				|  |  | +
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				|  |  | +#include "src/core/lib/iomgr/port.h"
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				|  |  | +
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				|  |  | +#ifdef GRPC_CFSTREAM_IOMGR
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				|  |  | +
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				|  |  | +
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				|  |  | +#include "src/core/lib/debug/trace.h"
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				|  |  | +#include "src/core/lib/iomgr/ev_posix.h"
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				|  |  | +#include "src/core/lib/iomgr/iomgr_internal.h"
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				|  |  | +#include "src/core/lib/iomgr/iomgr_posix.h"
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				|  |  | +#include "src/core/lib/iomgr/resolve_address.h"
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				|  |  | +#include "src/core/lib/iomgr/tcp_client.h"
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				|  |  | +#include "src/core/lib/iomgr/tcp_posix.h"
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				|  |  | +#include "src/core/lib/iomgr/tcp_server.h"
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				|  |  | +#include "src/core/lib/iomgr/timer.h"
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				|  |  | +
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				|  |  | +static const char *grpc_cfstream_env_var = "grpc_cfstream";
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				|  |  | +
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				|  |  | +extern grpc_tcp_server_vtable grpc_posix_tcp_server_vtable;
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				|  |  | +extern grpc_tcp_client_vtable grpc_posix_tcp_client_vtable;
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				|  |  | +extern grpc_tcp_client_vtable grpc_cfstream_client_vtable;
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				|  |  | +extern grpc_timer_vtable grpc_generic_timer_vtable;
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				|  |  | +extern grpc_pollset_vtable grpc_posix_pollset_vtable;
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				|  |  | +extern grpc_pollset_set_vtable grpc_posix_pollset_set_vtable;
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				|  |  | +extern grpc_address_resolver_vtable grpc_posix_resolver_vtable;
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				|  |  | +
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				|  |  | +static void iomgr_platform_init(void) {
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				|  |  | +  grpc_wakeup_fd_global_init();
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				|  |  | +  grpc_event_engine_init();
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				|  |  | +}
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				|  |  | +
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				|  |  | +static void iomgr_platform_flush(void) {}
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				|  |  | +
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				|  |  | +static void iomgr_platform_shutdown(void) {
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				|  |  | +  grpc_event_engine_shutdown();
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				|  |  | +  grpc_wakeup_fd_global_destroy();
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				|  |  | +}
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				|  |  | +
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				|  |  | +static grpc_iomgr_platform_vtable vtable = {
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				|  |  | +    iomgr_platform_init, iomgr_platform_flush, iomgr_platform_shutdown};
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				|  |  | +
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				|  |  | +void grpc_set_default_iomgr_platform() {
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				|  |  | +  char *enable_cfstream = getenv(grpc_cfstream_env_var);
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				|  |  | +  grpc_tcp_client_vtable *client_vtable = &grpc_posix_tcp_client_vtable;
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				|  |  | +  if (enable_cfstream != nullptr && enable_cfstream[0] == '1') {
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				|  |  | +    client_vtable = &grpc_cfstream_client_vtable;
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				|  |  | +  }
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				|  |  | +  grpc_set_tcp_client_impl(client_vtable);
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				|  |  | +  grpc_set_tcp_server_impl(&grpc_posix_tcp_server_vtable);
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				|  |  | +  grpc_set_timer_impl(&grpc_generic_timer_vtable);
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				|  |  | +  grpc_set_pollset_vtable(&grpc_posix_pollset_vtable);
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				|  |  | +  grpc_set_pollset_set_vtable(&grpc_posix_pollset_set_vtable);
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				|  |  | +  grpc_set_resolver_impl(&grpc_posix_resolver_vtable);
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				|  |  | +  grpc_set_iomgr_platform_vtable(&vtable);
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				|  |  | +}
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				|  |  | +
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				|  |  | +#endif /* GRPC_CFSTREAM_IOMGR */
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