98 lines
2.1 KiB
C++
98 lines
2.1 KiB
C++
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#include "../globals.h"
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/*
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* A "lock-and-signal" pair. These are necessarily coupled on pthreads
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* systems, and artificially coupled (by this file) on win32. Put
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* together here to minimize ifdefs elsewhere; you must use them as
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* if you're using a pthreads cvar+mutex pair.
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*/
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#include "lock_and_signal.h"
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#if defined(__WIN32__)
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lock_and_signal::lock_and_signal() {
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_event = CreateEvent(NULL, FALSE, FALSE, NULL);
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InitializeCriticalSection(&_cs);
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}
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#else
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lock_and_signal::lock_and_signal() {
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pthread_cond_init(&_cond, NULL);
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pthread_mutex_init(&_mutex, NULL);
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}
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#endif
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lock_and_signal::~lock_and_signal() {
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#if defined(__WIN32__)
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CloseHandle(_event);
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#else
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pthread_cond_destroy(&_cond);
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pthread_mutex_destroy(&_mutex);
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#endif
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}
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void lock_and_signal::lock() {
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#if defined(__WIN32__)
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EnterCriticalSection(&_cs);
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#else
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pthread_mutex_lock(&_mutex);
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#endif
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}
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void lock_and_signal::unlock() {
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#if defined(__WIN32__)
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LeaveCriticalSection(&_cs);
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#else
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pthread_mutex_unlock(&_mutex);
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#endif
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}
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/**
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* Wait indefinitely until condition is signaled.
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*/
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void lock_and_signal::wait() {
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timed_wait(0);
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}
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void lock_and_signal::timed_wait(size_t timeout_in_ns) {
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#if defined(__WIN32__)
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LeaveCriticalSection(&_cs);
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WaitForSingleObject(_event, INFINITE);
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EnterCriticalSection(&_cs);
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#else
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if (timeout_in_ns == 0) {
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pthread_cond_wait(&_cond, &_mutex);
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} else {
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timeval time_val;
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gettimeofday(&time_val, NULL);
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timespec time_spec;
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time_spec.tv_sec = time_val.tv_sec + 0;
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time_spec.tv_nsec = time_val.tv_usec * 1000 + timeout_in_ns;
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pthread_cond_timedwait(&_cond, &_mutex, &time_spec);
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}
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#endif
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}
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/**
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* Signal condition, and resume the waiting thread.
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*/
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void lock_and_signal::signal() {
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#if defined(__WIN32__)
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SetEvent(_event);
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#else
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pthread_cond_signal(&_cond);
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#endif
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}
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//
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// Local Variables:
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// mode: C++
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// fill-column: 78;
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// indent-tabs-mode: nil
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// c-basic-offset: 4
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// buffer-file-coding-system: utf-8-unix
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// compile-command: "make -k -C .. 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
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// End:
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