142 lines
3.8 KiB
C++
142 lines
3.8 KiB
C++
/*
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PIP - Platform Independent Primitives
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Stephan Fomenko
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "piconditionvar.h"
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#include "pithread.h"
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#include "pitime.h"
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#ifdef WINDOWS
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# undef _WIN32_WINNT
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# define _WIN32_WINNT 0x0600
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# include <synchapi.h>
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# include <windef.h>
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# include <winbase.h>
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#endif
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PRIVATE_DEFINITION_START(PIConditionVariable)
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#ifdef WINDOWS
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CONDITION_VARIABLE nativeHandle;
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#else
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pthread_cond_t nativeHandle;
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PIMutex * currentLock;
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#endif
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bool isDestroying;
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PRIVATE_DEFINITION_END(PIConditionVariable)
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PIConditionVariable::PIConditionVariable() {
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#ifdef WINDOWS
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InitializeConditionVariable(&PRIVATE->nativeHandle);
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#else
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PRIVATE->isDestroying = false;
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PRIVATE->currentLock = nullptr;
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memset(&(PRIVATE->nativeHandle), 0, sizeof(PRIVATE->nativeHandle));
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pthread_cond_init(&PRIVATE->nativeHandle, NULL);
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#endif
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}
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PIConditionVariable::~PIConditionVariable() {
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#ifdef WINDOWS
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#else
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pthread_cond_destroy(&PRIVATE->nativeHandle);
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#endif
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}
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void PIConditionVariable::wait(PIMutex& lk) {
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#ifdef WINDOWS
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SleepConditionVariableCS(&PRIVATE->nativeHandle, (PCRITICAL_SECTION)lk.handle(), INFINITE);
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#else
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pthread_cond_wait(&PRIVATE->nativeHandle, (pthread_mutex_t*)lk.handle());
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#endif
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}
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void PIConditionVariable::wait(PIMutex& lk, const std::function<bool()>& condition) {
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bool isCondition;
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while (true) {
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isCondition = condition();
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if (isCondition) break;
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#ifdef WINDOWS
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SleepConditionVariableCS(&PRIVATE->nativeHandle, (PCRITICAL_SECTION)lk.handle(), INFINITE);
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#else
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pthread_cond_wait(&PRIVATE->nativeHandle, (pthread_mutex_t*)lk.handle());
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#endif
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if (PRIVATE->isDestroying) return;
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}
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}
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bool PIConditionVariable::waitFor(PIMutex &lk, int timeoutMs) {
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bool isNotTimeout;
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#ifdef WINDOWS
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isNotTimeout = SleepConditionVariableCS(&PRIVATE->nativeHandle, (PCRITICAL_SECTION)lk.handle(), timeoutMs) != 0;
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#else
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timespec abstime = {.tv_sec = timeoutMs / 1000, .tv_nsec = timeoutMs * 1000 * 1000};
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isNotTimeout = pthread_cond_timedwait(&PRIVATE->nativeHandle, (pthread_mutex_t*)lk.handle(), &abstime) == 0;
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#endif
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if (PRIVATE->isDestroying) return false;
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return isNotTimeout;
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}
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bool PIConditionVariable::waitFor(PIMutex& lk, int timeoutMs, const std::function<bool()> &condition) {
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bool isCondition;
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PITimeMeasurer measurer;
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while (true) {
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isCondition = condition();
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if (isCondition) break;
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#ifdef WINDOWS
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WINBOOL isTimeout = SleepConditionVariableCS(
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&PRIVATE->nativeHandle,
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(PCRITICAL_SECTION)lk.handle(),
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timeoutMs - (int)measurer.elapsed_m());
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if (isTimeout == 0) return false;
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#else
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int timeoutCurr = timeoutMs - (int)measurer.elapsed_m();
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timespec abstime = {.tv_sec = timeoutCurr / 1000, .tv_nsec = timeoutCurr * 1000 * 1000};
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bool isTimeout = pthread_cond_timedwait(&PRIVATE->nativeHandle, (pthread_mutex_t*)lk.handle(), &abstime) == 0;
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if (isTimeout) return false;
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#endif
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if (PRIVATE->isDestroying) return false;
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}
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return true;
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}
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void PIConditionVariable::notifyOne() {
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#ifdef WINDOWS
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WakeConditionVariable(&PRIVATE->nativeHandle);
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#else
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pthread_cond_signal(&PRIVATE->nativeHandle);
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#endif
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}
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void PIConditionVariable::notifyAll() {
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#ifdef WINDOWS
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WakeAllConditionVariable(&PRIVATE->nativeHandle);
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#else
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pthread_cond_broadcast(&PRIVATE->nativeHandle);
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#endif
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}
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