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/*
*
* Copyright 2015 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#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,
grpc_timespec_to_millis(&exec_ctx, deadline),
&alarm->on_alarm);
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_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
grpc_alarm_cancel(alarm);
GRPC_CQ_INTERNAL_UNREF(&exec_ctx, alarm->cq, "alarm");
gpr_free(alarm);
grpc_exec_ctx_finish(&exec_ctx);
}
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