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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file */
#include <stdbool.h>
#include <isc/async.h>
#include <isc/atomic.h>
#include <isc/condition.h>
#include <isc/heap.h>
#include <isc/job.h>
#include <isc/log.h>
#include <isc/magic.h>
#include <isc/mem.h>
#include <isc/once.h>
#include <isc/refcount.h>
#include <isc/thread.h>
#include <isc/time.h>
#include <isc/timer.h>
#include <isc/util.h>
#include <isc/uv.h>
#include "loop_p.h"
#define TIMER_MAGIC ISC_MAGIC('T', 'I', 'M', 'R')
#define VALID_TIMER(t) ISC_MAGIC_VALID(t, TIMER_MAGIC)
struct isc_timer {
unsigned int magic;
isc_loop_t *loop;
uv_timer_t timer;
isc_job_cb cb;
void *cbarg;
uint64_t timeout;
uint64_t repeat;
atomic_bool running;
};
void
isc_timer_create(isc_loop_t *loop, isc_job_cb cb, void *cbarg,
isc_timer_t **timerp) {
int r;
isc_timer_t *timer;
isc_loopmgr_t *loopmgr = NULL;
REQUIRE(cb != NULL);
REQUIRE(timerp != NULL && *timerp == NULL);
REQUIRE(VALID_LOOP(loop));
loopmgr = loop->loopmgr;
REQUIRE(VALID_LOOPMGR(loopmgr));
REQUIRE(loop == isc_loop());
timer = isc_mem_get(loop->mctx, sizeof(*timer));
*timer = (isc_timer_t){
.cb = cb,
.cbarg = cbarg,
.magic = TIMER_MAGIC,
};
isc_loop_attach(loop, &timer->loop);
r = uv_timer_init(&loop->loop, &timer->timer);
UV_RUNTIME_CHECK(uv_timer_init, r);
uv_handle_set_data(&timer->timer, timer);
*timerp = timer;
}
void
isc_timer_stop(isc_timer_t *timer) {
REQUIRE(VALID_TIMER(timer));
if (!atomic_compare_exchange_strong_acq_rel(&timer->running,
&(bool){ true }, false))
{
/* Timer was already stopped */
return;
}
/* Stop the timer, if the loops are matching */
if (timer->loop == isc_loop()) {
uv_timer_stop(&timer->timer);
}
}
static void
timer_cb(uv_timer_t *handle) {
isc_timer_t *timer = uv_handle_get_data(handle);
REQUIRE(VALID_TIMER(timer));
if (!atomic_load_acquire(&timer->running)) {
uv_timer_stop(&timer->timer);
return;
}
timer->cb(timer->cbarg);
}
void
isc_timer_start(isc_timer_t *timer, isc_timertype_t type,
const isc_interval_t *interval) {
isc_loopmgr_t *loopmgr = NULL;
isc_loop_t *loop = NULL;
int r;
REQUIRE(VALID_TIMER(timer));
REQUIRE(type == isc_timertype_ticker || type == isc_timertype_once);
REQUIRE(timer->loop == isc_loop());
loop = timer->loop;
REQUIRE(VALID_LOOP(loop));
loopmgr = loop->loopmgr;
REQUIRE(VALID_LOOPMGR(loopmgr));
switch (type) {
case isc_timertype_once:
timer->timeout = isc_interval_ms(interval);
timer->repeat = 0;
break;
case isc_timertype_ticker:
timer->timeout = timer->repeat = isc_interval_ms(interval);
break;
default:
UNREACHABLE();
}
atomic_store_release(&timer->running, true);
r = uv_timer_start(&timer->timer, timer_cb, timer->timeout,
timer->repeat);
UV_RUNTIME_CHECK(uv_timer_start, r);
}
static void
timer_close(uv_handle_t *handle) {
isc_timer_t *timer = uv_handle_get_data(handle);
isc_loop_t *loop;
REQUIRE(VALID_TIMER(timer));
loop = timer->loop;
isc_mem_put(loop->mctx, timer, sizeof(*timer));
isc_loop_detach(&loop);
}
static void
timer_destroy(void *arg) {
isc_timer_t *timer = arg;
atomic_store_release(&timer->running, false);
uv_timer_stop(&timer->timer);
uv_close(&timer->timer, timer_close);
}
void
isc_timer_destroy(isc_timer_t **timerp) {
isc_timer_t *timer = NULL;
REQUIRE(timerp != NULL && VALID_TIMER(*timerp));
timer = *timerp;
*timerp = NULL;
REQUIRE(timer->loop == isc_loop());
timer_destroy(timer);
}
void
isc_timer_async_destroy(isc_timer_t **timerp) {
isc_timer_t *timer = NULL;
REQUIRE(timerp != NULL && VALID_TIMER(*timerp));
timer = *timerp;
*timerp = NULL;
isc_timer_stop(timer);
isc_async_run(timer->loop, timer_destroy, timer);
}
bool
isc_timer_running(isc_timer_t *timer) {
REQUIRE(VALID_TIMER(timer));
return atomic_load_acquire(&timer->running);
}
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