[GitHub] [incubator-mxnet] lilongyue opened a new issue #17374: potential dead lock bug!

[GitBox <gi...@apache.org>]

lilongyue opened a new issue #17374: potential dead lock bug!
URL: https://github.com/apache/incubator-mxnet/issues/17374
 
 
   in the file 'dmlc-core/include/dmlc/thread_group.h'  
   
   in the file    two functions below are used as initializer  of engine threads:
   there is a potential dead lock bug inside these functions:
   (eg.
   1. wait  thread get the mutex_ lock and switch to engine thread 
   2. engine thread  set signaled_ = true;  and switch to wait  thread
   3.wait thread bypass if condition and continues to execute
   4. the engine just stuck at the std::unique_lock  and dead there
   )
   
   
    void wait() {
       std::unique_lock<std::mutex> lock(mutex_);
       if (!signaled_) {
         condition_variable_.wait(lock);
       }
     }
   
     /*!
      * \brief Set this object's state to signaled (wait() will release or pass through)
      */
     void signal() {
       signaled_ = true;
       std::unique_lock<std::mutex> lk(mutex_);
       condition_variable_.notify_all();
     }

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[GitHub] [incubator-mxnet] lilongyue closed issue #17374: potential dead lock bug! in 'dmlc-core'

[GitBox <gi...@apache.org>]

lilongyue closed issue #17374: potential dead lock bug!   in 'dmlc-core'
URL: https://github.com/apache/incubator-mxnet/issues/17374
 
 
   

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