jevent.cpp
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/***************************************************************************
* Copyright (C) 2005 by Jeff Ferr *
* root@sat *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* 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 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "Stdafx.h"
#include "jevent.h"
#include "jsemaphoreexception.h"
#include "jsemaphoretimeoutexception.h"
namespace jthread {
Event::Event()
{
#ifdef _WIN32
// single event
// event = CreateEvent(NULL, FALSE, FALSE, NULL);
// broadcast event
_event = CreateEvent(NULL, TRUE, FALSE, NULL);
if (_event == INVALID_HANDLE_VALUE) {
throw SemaphoreException("Init semaphore error !");
}
#else
_signaled = false;
_count = 0;
if (pthread_cond_init(&_condition, NULL) != 0) {
throw SemaphoreException("Init semaphore error !");
}
#endif
}
Event::~Event()
{
Release();
}
void Event::Reset()
{
#ifdef _WIN32
if (!ResetEvent(_event)) {
// throw ?
}
#else
_mutex.Lock();
_signaled = false;
_mutex.Unlock();
#endif
}
void Event::Wait()
{
#ifdef _WIN32
if (WaitForSingleObject(_event, INFINITE) == WAIT_FAILED) {
throw SemaphoreException("Condition wait error !");
}
#else
int rc = 0;
_mutex.Lock();
if (_signaled) {
_signaled = false;
} else {
_count++;
rc = pthread_cond_wait(&_condition, &_mutex._mutex);
_count--;
}
_mutex.Unlock();
if (rc != 0) {
throw SemaphoreException("Condition wait error !");
}
#endif
}
void Event::Wait(uint64_t time_)
{
#ifdef _WIN32
DWORD millisecs,
status;
millisecs = (DWORD)(time_*1000LL);
status = WaitForSingleObject(_event, millisecs);
if (status == WAIT_TIMEOUT) {
throw SemaphoreTimeoutException("Semaphore wait timeout");
} else if (status == WAIT_FAILED) {
throw SemaphoreTimeoutException("Semaphore wait failed");
}
#else
struct timespec t;
int rc = 0;
_mutex.Lock();
if (_signaled) {
_signaled = false;
} else {
clock_gettime(CLOCK_REALTIME, &t);
t.tv_sec += (int64_t)(time_/1000000LL);
t.tv_nsec += (int64_t)((time_%1000000LL)*1000LL);
_count++;
rc = pthread_cond_timedwait(&_condition, &_mutex._mutex, &t);
_count--;
}
_mutex.Unlock();
if (rc != 0) {
if (rc == ETIMEDOUT) {
throw SemaphoreTimeoutException("Semaphore wait timeout");
} else {
throw SemaphoreTimeoutException("Semaphore wait failed");
}
}
#endif
}
void Event::Notify()
{
#ifdef _WIN32
BOOL success = FALSE;
// single event
success = SetEvent(_event);
if (!success) {
throw SemaphoreException("Semaphore notify error !");
}
#else
int rc = 0;
_mutex.Lock();
if (_count == 0) {
_signaled = true;
} else {
rc = pthread_cond_signal(&_condition);
}
_mutex.Unlock();
if (rc != 0) {
throw SemaphoreException("Semaphore notify error !");
}
#endif
}
void Event::NotifyAll()
{
#ifdef _WIN32
BOOL success = FALSE;
// broadcast event
success = PulseEvent(_event);
if (!success) {
throw SemaphoreException("Semaphore notify error !");
}
#else
int rc = 0;
_mutex.Lock();
rc = pthread_cond_broadcast(&_condition);
_signaled = false;
_count = 0;
_mutex.Unlock();
if (rc != 0) {
throw SemaphoreException("Semaphore notify all error !");
}
#endif
}
void Event::Release()
{
#ifdef _WIN32
if (!CloseHandle(_event)) {
// throw ?
}
_event = INVALID_HANDLE_VALUE;
#else
while (pthread_cond_destroy(&_condition) == EBUSY) {
Notify();
}
#endif
}
}