137 lines
4.1 KiB
C++
137 lines
4.1 KiB
C++
/* Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License, version 2.0,
|
|
as published by the Free Software Foundation.
|
|
|
|
This program is also distributed with certain software (including
|
|
but not limited to OpenSSL) that is licensed under separate terms,
|
|
as designated in a particular file or component or in included license
|
|
documentation. The authors of MySQL hereby grant you an additional
|
|
permission to link the program and your derivative works with the
|
|
separately licensed software that they have included with MySQL.
|
|
|
|
Without limiting anything contained in the foregoing, this file,
|
|
which is part of C Driver for MySQL (Connector/C), is also subject to the
|
|
Universal FOSS Exception, version 1.0, a copy of which can be found at
|
|
http://oss.oracle.com/licenses/universal-foss-exception.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License, version 2.0, for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
|
|
|
|
/**
|
|
@file mysys/posix_timers.cc
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include <string.h> /* memset */
|
|
#include <sys/time.h>
|
|
|
|
#include "my_timer.h" /* my_timer_t */
|
|
|
|
/**
|
|
Timer expiration notification thread.
|
|
|
|
@param arg Event info.
|
|
*/
|
|
|
|
static void timer_notify_thread_func(sigval arg) {
|
|
my_timer_t *timer = static_cast<my_timer_t *>(arg.sival_ptr);
|
|
timer->notify_function(timer);
|
|
}
|
|
|
|
int my_timer_initialize() { return 0; }
|
|
|
|
void my_timer_deinitialize() {}
|
|
|
|
/**
|
|
Create a timer object.
|
|
|
|
@param timer Location where the timer ID is returned.
|
|
|
|
@return On success, 0.
|
|
On error, -1 is returned, and errno is set to indicate the error.
|
|
*/
|
|
|
|
int my_timer_create(my_timer_t *timer) {
|
|
struct sigevent sigev;
|
|
|
|
memset(&sigev, 0, sizeof(sigev));
|
|
|
|
sigev.sigev_notify = SIGEV_THREAD;
|
|
sigev.sigev_value.sival_ptr = timer;
|
|
sigev.sigev_notify_function = &timer_notify_thread_func;
|
|
|
|
#ifdef __sun // CLOCK_MONOTONIC not supported on Solaris even if it compiles.
|
|
return timer_create(CLOCK_REALTIME, &sigev, &timer->id);
|
|
#else
|
|
return timer_create(CLOCK_MONOTONIC, &sigev, &timer->id);
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
Set the time until the next expiration of the timer.
|
|
|
|
@param timer Timer object.
|
|
@param time Amount of time (in milliseconds) before the timer expires.
|
|
|
|
@return On success, 0.
|
|
On error, -1 is returned, and errno is set to indicate the error.
|
|
*/
|
|
|
|
int my_timer_set(my_timer_t *timer, unsigned long time) {
|
|
struct itimerspec spec;
|
|
spec.it_interval.tv_sec = 0;
|
|
spec.it_interval.tv_nsec = 0;
|
|
spec.it_value.tv_sec = static_cast<time_t>(time / 1000);
|
|
spec.it_value.tv_nsec = static_cast<long>((time % 1000) * 1000000);
|
|
return timer_settime(timer->id, 0, &spec, NULL);
|
|
}
|
|
|
|
/**
|
|
Cancel the timer.
|
|
|
|
@param timer Timer object.
|
|
@param state The state of the timer at the time of cancellation, either
|
|
signaled (false) or nonsignaled (true).
|
|
|
|
@return On success, 0.
|
|
On error, -1 is returned, and errno is set to indicate the error.
|
|
*/
|
|
|
|
int my_timer_cancel(my_timer_t *timer, int *state) {
|
|
int status;
|
|
struct itimerspec old_spec;
|
|
|
|
/* A zeroed initial expiration value disarms the timer. */
|
|
struct itimerspec zero_spec;
|
|
zero_spec.it_interval.tv_sec = 0;
|
|
zero_spec.it_interval.tv_nsec = 0;
|
|
zero_spec.it_value.tv_sec = 0;
|
|
zero_spec.it_value.tv_nsec = 0;
|
|
|
|
/*
|
|
timer_settime returns the amount of time before the timer
|
|
would have expired or zero if the timer was disarmed.
|
|
*/
|
|
if (!(status = timer_settime(timer->id, 0, &zero_spec, &old_spec)))
|
|
*state = (old_spec.it_value.tv_sec || old_spec.it_value.tv_nsec);
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
Delete a timer object.
|
|
|
|
@param timer Timer object.
|
|
*/
|
|
|
|
void my_timer_delete(my_timer_t *timer) { timer_delete(timer->id); }
|