c++ - pthread_cond_wait() not waking up on signal -


i trying wake thread queue process data, except it's not waking up. not sure if approach flawed. here code:

main:

struct threadoperationstruct _threadio;  int main(int argc, char** argv)  {     // threads created here... }

my waiting thread:

void decompresslogfile::wait() {     while (!_threadio.endevent)     {         pthread_mutex_lock(&lock);         size_t queuesize = _threadio.decompresslogqueue.size();          if (!queuesize)         {             // prevent further thread execution             fprintf(stdout, "decompresslogfile() thread sleeping...\n");             pthread_cond_wait(&_threadio.decompressqueuenotify, &lock);         } else {             fprintf(stdout, "processing compressed log files. queue size %lu\n", queuesize);             /*              * async tasks need go here...              */             //bzip2_decompressfile();             _threadio.decompresslogqueue.pop();         }     }      fprintf(stdout, "wait() end\n"); }

another class on thread:

    _threadio.decompresslogqueue.push(newlog);     pthread_cond_signal(&_threadio.decompressqueuenotify);

the struct looks this:

struct threadoperationstruct {     std::queue<std::string> decompresslogqueue;     std::queue<std::string> processlogqueue;      void notifydecompressthread()     {         fprintf(stdout, "notifying..\n");         pthread_cond_signal(&this->decompressqueuenotify);     }      pthread_cond_t decompressqueuenotify;     pthread_cond_t processqueuenotify;     bool endevent = false; };  extern threadoperationstruct _threadio;

now, question irrelevant question above... i've had experience using c++11 threads on windows , not on linux. i've read around portability, should remain pthread on linux. hold true c++14?

thanks


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