Remove argument to grpc_em_alarm_cancel as it isn't used.

	Change on 2014/12/01 by vpai <vpai@google.com>
-------------
Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=81088661

src/core/channel/client_setup.c

@@ -108,7 +108,6 @@ static void setup_initiate(grpc_transport_setup *sp) {
    not to initiate again) */
 static void setup_cancel(grpc_transport_setup *sp) {
   grpc_client_setup *s = (grpc_client_setup *)sp;
-  void *ignored;
 
   gpr_mu_lock(&s->mu);
 
@@ -116,7 +115,7 @@ static void setup_cancel(grpc_transport_setup *sp) {
   /* effectively cancels the current request (if any) */
   s->active_request = NULL;
   if (s->in_alarm) {
-    grpc_em_alarm_cancel(&s->backoff_alarm, &ignored);
+    grpc_em_alarm_cancel(&s->backoff_alarm);
   }
   if (--s->refs == 0) {
     gpr_mu_unlock(&s->mu);

src/core/eventmanager/em.c

@@ -340,12 +340,10 @@ grpc_em_error grpc_em_alarm_add(grpc_em_alarm *alarm, gpr_timespec deadline) {
   }
 }
 
-grpc_em_error grpc_em_alarm_cancel(grpc_em_alarm *alarm, void **arg) {
+grpc_em_error grpc_em_alarm_cancel(grpc_em_alarm *alarm) {
   grpc_em_activation_data *adata = &alarm->task.activation[GRPC_EM_TA_ONLY];
   int trigger_old;
 
-  *arg = adata->arg;
-
   /* First check if this alarm has been triggered, atomically */
   trigger_old =
       gpr_atm_full_fetch_add(&alarm->triggered, ALARM_TRIGGER_INCREMENT);

src/core/eventmanager/em.h

@@ -136,7 +136,7 @@ grpc_em_error grpc_em_alarm_add(grpc_em_alarm *alarm, gpr_timespec deadline);
    or from the activation (with status SUCCESS)
 
    Requires:  cancel() must happen after add() on a given alarm */
-grpc_em_error grpc_em_alarm_cancel(grpc_em_alarm *alarm, void **arg);
+grpc_em_error grpc_em_alarm_cancel(grpc_em_alarm *alarm);
 
 /* ========================== grpc_em_fd ============================= */
 

src/core/surface/call.c

@@ -253,8 +253,7 @@ void grpc_call_internal_unref(grpc_call *c) {
 void grpc_call_destroy(grpc_call *c) {
   gpr_mu_lock(&c->read_mu);
   if (c->have_alarm) {
-    void *arg_was;
-    grpc_em_alarm_cancel(&c->alarm, &arg_was);
+    grpc_em_alarm_cancel(&c->alarm);
     c->have_alarm = 0;
   }
   gpr_mu_unlock(&c->read_mu);
@@ -774,8 +773,7 @@ void grpc_call_recv_finish(grpc_call_element *elem, int is_full_close) {
   }
   if (is_full_close) {
     if (call->have_alarm) {
-      void *arg_was;
-      grpc_em_alarm_cancel(&call->alarm, &arg_was);
+      grpc_em_alarm_cancel(&call->alarm);
       call->have_alarm = 0;
     }
     call->received_finish = 1;

test/core/eventmanager/em_test.c

@@ -580,7 +580,6 @@ static void test_grpc_em_alarm() {
   gpr_timespec alarm_deadline;
   gpr_timespec followup_deadline;
 
-  alarm_arg *cancel_arg = NULL;
   alarm_arg arg;
   alarm_arg arg2;
   void *fdone;
@@ -649,7 +648,7 @@ static void test_grpc_em_alarm() {
              GRPC_EM_OK);
   GPR_ASSERT(grpc_em_alarm_add(&alarm_to_cancel,
                                gpr_time_add(tv2, gpr_now())) == GRPC_EM_OK);
-  switch (grpc_em_alarm_cancel(&alarm_to_cancel, (void **)&cancel_arg)) {
+  switch (grpc_em_alarm_cancel(&alarm_to_cancel)) {
     case GRPC_EM_OK:
       gpr_log(GPR_INFO, "Alarm cancel succeeded");
       break;
@@ -700,10 +699,6 @@ static void test_grpc_em_alarm() {
     GPR_ASSERT(0);
   }
 
-  if (cancel_arg != &arg2) {
-    gpr_log(GPR_ERROR, "Alarm cancel arg address wrong");
-    GPR_ASSERT(0);
-  }
   if (fdone != (void *)&arg2.fcb_arg) {
     gpr_log(GPR_ERROR, "Followup callback #2 not invoked properly %p %p", fdone,
             &arg2.fcb_arg);