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Changed the Unix implementation of sf::Sleep to a more robust one

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This commit is contained in:
Laurent Gomila 2011-12-13 19:06:13 +01:00
parent bc64da0469
commit 3a732133cb
1 changed files with 30 additions and 1 deletions
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31
src/SFML/System/Unix/Platform.cpp
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@ -26,6 +26,7 @@
// Headers
////////////////////////////////////////////////////////////
#include <SFML/System/Unix/Platform.hpp>
#include <pthread.h>
#include <unistd.h>
#include <sys/time.h>
@ -47,7 +48,35 @@ Uint64 Platform::GetSystemTime()
////////////////////////////////////////////////////////////
void Platform::Sleep(Uint32 time)
{
usleep(time * 1000);
// usleep is not reliable enough (it might block the
// whole process instead of just the current thread)
// so we must use pthread_cond_timedwait instead
// this implementation is inspired from Qt
// first get the current time
timeval tv;
gettimeofday(&tv, NULL);
// construct the time limit (current time + time to wait)
timespec ti;
ti.tv_nsec = (tv.tv_usec + (time % 1000) * 1000) * 1000;
ti.tv_sec = tv.tv_sec + (time / 1000) + (ti.tv_nsec / 1000000000);
ti.tv_nsec %= 1000000000;
// create a mutex and thread condition
pthread_mutex_t mutex;
pthread_mutex_init(&mutex, 0);
pthread_cond_t condition;
pthread_cond_init(&condition, 0);
// wait...
pthread_mutex_lock(&mutex);
pthread_cond_timedwait(&condition, &mutex, &ti);
pthread_mutex_unlock(&mutex);
// destroy the mutex and condition
pthread_cond_destroy(&condition);
pthread_mutex_destroy(&mutex);
}
} // namespace priv