本文整理汇总了C++中wxSemaphore::WaitTimeout方法的典型用法代码示例。如果您正苦于以下问题：C++ wxSemaphore::WaitTimeout方法的具体用法？C++ wxSemaphore::WaitTimeout怎么用？C++ wxSemaphore::WaitTimeout使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类wxSemaphore的用法示例。
在下文中一共展示了wxSemaphore::WaitTimeout方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: WaitTimeout
wxCondError wxConditionInternal::WaitTimeout(unsigned long milliseconds)
{
{
wxCriticalSectionLocker lock(m_csWaiters);
m_numWaiters++;
}
m_mutex.Unlock();
wxSemaError err = m_semaphore.WaitTimeout(milliseconds);
m_mutex.Lock();
if ( err == wxSEMA_NO_ERROR )
return wxCOND_NO_ERROR;
if ( err == wxSEMA_TIMEOUT )
{
// a potential race condition exists here: it happens when a waiting
// thread times out but doesn't have time to decrement m_numWaiters yet
// before Signal() is called in another thread
//
// to handle this particular case, check the semaphore again after
// acquiring m_csWaiters lock -- this will catch the signals missed
// during this window
wxCriticalSectionLocker lock(m_csWaiters);
err = m_semaphore.WaitTimeout(0);
if ( err == wxSEMA_NO_ERROR )
return wxCOND_NO_ERROR;
// we need to decrement m_numWaiters ourselves as it wasn't done by
// Signal()
m_numWaiters--;
return err == wxSEMA_TIMEOUT ? wxCOND_TIMEOUT : wxCOND_MISC_ERROR;
}
// undo m_numWaiters++ above in case of an error
{
wxCriticalSectionLocker lock(m_csWaiters);
m_numWaiters--;
}
return wxCOND_MISC_ERROR;
}示例2: WaitTimeout
wxCondError wxConditionInternal::WaitTimeout( unsigned long milliseconds )
{
IncrementAtomic( &m_numWaiters );
m_mutex.Unlock();
// a race condition can occur at this point in the code
//
// please see the comments in Wait(), for details
wxSemaError err = m_semaphore.WaitTimeout(milliseconds);
if ( err == wxSEMA_TIMEOUT )
{
// another potential race condition exists here it is caused when a
// 'waiting' thread timesout, and returns from WaitForSingleObject, but
// has not yet decremented 'nwaiters'.
//
// at this point if another thread calls signal() then the semaphore
// will be incremented, but the waiting thread will miss it.
//
// to handle this particular case, the waiting thread calls
// WaitForSingleObject again with a timeout of 0, after locking
// 'nwaiters_mutex'. this call does not block because of the zero
// timeout, but will allow the waiting thread to catch the missed
// signals.
wxCriticalSectionLocker lock(m_csWaiters);
err = m_semaphore.WaitTimeout(0);
if ( err != wxSEMA_NO_ERROR )
{
m_numWaiters--;
}
}
m_mutex.Lock();
return err == wxSEMA_NO_ERROR ? wxCOND_NO_ERROR : wxCOND_MISC_ERROR;
}