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POWindows Event implementation in Linux using conditional variables?
 

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    <p>I am trying to implement very simple Windows events in Linux. Only for my scenario - 3 threads, 1 main and 2 secondary. Each of secondary threads raise 1 event by SetEvent and main thread wait it. Example:</p> <pre><code>int main() { void* Events[2]; Events[0] = CreateEvent(); Events[1] = CreateEvent(); pthread_start(Thread, Events[0]); pthread_start(Thread, Events[1]); WaitForMultipleObjects(2, Events, 30000) // 30 seconds timeout return 0; } int* thread(void* Event) { // Do something SetEvent(Event); // Do something } </code></pre> <p>So, to implement it, i use conditional variables. But my question is - is this a right way? Or i doing something wrong? My implementation:</p> <pre><code>// Actually, this function return pointer to struct with mutex and cond // here i just simplified example void* CreateEvent(mutex, condition) { pthread_mutex_init(mutex, NULL); pthread_cond_init(condition, NULL); } bool SetEvent (mutex, condition) { pthread_mutex_lock(mutex); pthread_cond_signal(condition); pthread_mutex_unlock(mutex); } int WaitForSingleObject(mutex, condition, timeout) { pthread_mutex_lock(mutex); pthread_cond_timedwait(condition, mutex, timeout); pthread_mutex_unlock(mutex); } // Call WaitForSingleObject for each event. // Yes, i know, that its a wrong way, but it should work in my example. int WaitForMultipleObjects(count, mutex[], condition[], timeout); </code></pre> <p>And all seems good, but i think, that problem will appear when i call WaitFor.. function in Main thread before SetEvent in secondary thread will be called. In Windows, it worked well, but in Linux - only idea is described above.</p> <p>Maybe you tell me the better way to solve it? Thank you.</p> <p><strong>UPD:</strong> Timeout is very important, because one of the secondary threads may not pass SetEvent().</p>
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    1. COWe have an open source (MIT-licensed) library called `pevents` which implements WIN32 manual and auto-reset events on linux, and includes both WaitForSingleObject and WaitForMultipleObjects clones: https://github.com/NeoSmart/PEvents
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