From: markus.forrer@gmx.ch
To: pthreads-win32@sourceware.org
Subject: Problems with conditions
Date: Mon, 29 Mar 2021 14:19:58 +0200 [thread overview]
Message-ID: <trinity-fcaf2ac8-7b07-45d4-a019-052fd50dfabb-1617020398606@3c-app-gmx-bap72> (raw)
I have re-implemented the C++ class OSEvent for a Windows simulation that exists for a Linux platform. Thereby I have the problem that the function pthread_cond_wait() does not wait until pthread_cond_signal() is called. Something I have misunderstood.
Many thanks for any hints!
OSEvent::OSEvent()
{
pthread_condattr_init(&_conditionAttribute);
pthread_cond_init(&_condition, &_conditionAttribute);
pthread_mutexattr_init(&_mutexAttribute);
pthread_mutexattr_settype(&_mutexAttribute, PTHREAD_MUTEX_ERRORCHECK);
pthread_mutex_init(&_mutex, &_mutexAttribute);
}
OSEvent::~OSEvent()
{
pthread_cond_destroy(&_condition);
pthread_condattr_destroy(&_conditionAttribute);
pthread_mutex_destroy(&_mutex);
pthread_mutexattr_destroy(&_mutexAttribute);
}
void OSEvent::signal()
{
pthread_mutex_lock(&_mutex);
pthread_cond_signal(&_condition);
pthread_mutex_unlock(&_mutex);
}
OSEventError OSEvent::timedwait(uint32_t timeout)
{
struct timespec timeoutTime;
timeoutTime.tv_sec = timeout / 1000;
timeoutTime.tv_nsec = 1000000 * (timeout % 1000);
OSEventError success = OSEventError::NoError;
pthread_mutex_lock(&_mutex);
// Timeout forever
if (timeout == 0)
{
if (pthread_cond_wait(&_condition, &_mutex) != 0)
{
success = OSEventError::Timeout;
}
}
// Timeout time
else
{
if (pthread_cond_timedwait(&_condition, &_mutex, &timeoutTime) != 0)
{
success = OSEventError::Timeout;
}
}
pthread_mutex_unlock(&_mutex);
return success;
}
next reply other threads:[~2021-03-29 12:20 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-29 12:19 markus.forrer [this message]
2021-03-30 7:15 ` Ger Hobbelt
2021-03-30 15:37 ` Aw: " markus.forrer
2021-03-31 1:30 ` ross.johnson
2021-03-31 4:43 ` Markus Forrer
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