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98 lines
1.7 KiB
C++
98 lines
1.7 KiB
C++
// This code is in the public domain -- castano@gmail.com
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#include "Event.h"
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#if NV_OS_WIN32
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#include "Win32.h"
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#elif NV_OS_USE_PTHREAD
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#include <pthread.h>
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#endif
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using namespace nv;
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#if NV_OS_WIN32
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struct Event::Private {
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HANDLE handle;
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};
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Event::Event() : m(new Private) {
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m->handle = CreateEvent(NULL, FALSE, FALSE, NULL);
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}
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Event::~Event() {
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CloseHandle(m->handle);
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}
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void Event::post() {
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SetEvent(m->handle);
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}
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void Event::wait() {
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WaitForSingleObject(m->handle, INFINITE);
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}
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#elif NV_OS_USE_PTHREAD
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struct Event::Private {
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pthread_cond_t pt_cond;
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pthread_mutex_t pt_mutex;
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int count;
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int wait_count;
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};
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Event::Event() : m(new Private) {
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m->count=0;
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m->wait_count=0;
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pthread_mutex_init(&m->pt_mutex, NULL);
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pthread_cond_init(&m->pt_cond, NULL);
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}
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Event::~Event() {
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pthread_cond_destroy(&m->pt_cond);
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pthread_mutex_destroy(&m->pt_mutex);
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}
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void Event::post() {
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pthread_mutex_lock(&m->pt_mutex);
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m->count++;
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//ACS: move this after the unlock?
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if(m->wait_count>0) {
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pthread_cond_signal(&m->pt_cond);
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}
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pthread_mutex_unlock(&m->pt_mutex);
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}
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void Event::wait() {
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pthread_mutex_lock(&m->pt_mutex);
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while(m->count==0) {
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m->wait_count++;
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pthread_cond_wait(&m->pt_cond, &m->pt_mutex);
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m->wait_count--;
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}
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m->count--;
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pthread_mutex_unlock(&m->pt_mutex);
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}
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#endif // NV_OS_UNIX
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/*static*/ void Event::post(Event * events, uint count) {
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for (uint i = 0; i < count; i++) {
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events[i].post();
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}
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}
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/*static*/ void Event::wait(Event * events, uint count) {
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// @@ Use wait for multiple objects in win32?
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for (uint i = 0; i < count; i++) {
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events[i].wait();
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}
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}
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