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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <grpc/grpc.h>
#include <grpc/support/alloc.h>
#include "src/core/lib/iomgr/timer.h"
#include "src/core/lib/surface/completion_queue.h"
struct grpc_alarm {
grpc_timer alarm;
grpc_closure on_alarm;
grpc_cq_completion completion;
/** completion queue where events about this alarm will be posted */
grpc_completion_queue *cq;
/** user supplied tag */
void *tag;
};
static void do_nothing_end_completion(grpc_exec_ctx *exec_ctx, void *arg,
grpc_cq_completion *c) {}
static void alarm_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
grpc_alarm *alarm = arg;
grpc_cq_end_op(exec_ctx, alarm->cq, alarm->tag, error,
do_nothing_end_completion, NULL, &alarm->completion);
}
grpc_alarm *grpc_alarm_create(grpc_completion_queue *cq, gpr_timespec deadline,
void *tag) {
grpc_alarm *alarm = gpr_malloc(sizeof(grpc_alarm));
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
GRPC_CQ_INTERNAL_REF(cq, "alarm");
alarm->cq = cq;
alarm->tag = tag;
grpc_cq_begin_op(cq, tag);
grpc_closure_init(&alarm->on_alarm, alarm_cb, alarm,
grpc_schedule_on_exec_ctx);
grpc_timer_init(&exec_ctx, &alarm->alarm,
gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC),
&alarm->on_alarm, gpr_now(GPR_CLOCK_MONOTONIC));
grpc_exec_ctx_finish(&exec_ctx);
return alarm;
}
void grpc_alarm_cancel(grpc_alarm *alarm) {
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
grpc_timer_cancel(&exec_ctx, &alarm->alarm);
grpc_exec_ctx_finish(&exec_ctx);
}
void grpc_alarm_destroy(grpc_alarm *alarm) {
grpc_alarm_cancel(alarm);
GRPC_CQ_INTERNAL_UNREF(alarm->cq, "alarm");
gpr_free(alarm);
}
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