semaphore.h

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/*
* Semaphore
* (C) 2013 Joel Low
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
 
#ifndef BOTAN_SEMAPHORE_H_
#define BOTAN_SEMAPHORE_H_
 
#include <condition_variable>
#include <mutex>
 
namespace Botan {
 
class Semaphore final {
   public:
      explicit Semaphore(int value = 0) : m_value(value), m_wakeups(0) {}
 
      void acquire();
 
      void release(size_t n = 1);
 
   private:
      int m_value;
      int m_wakeups;
      std::mutex m_mutex;
      std::condition_variable m_cond;
};
 
}  // namespace Botan
 
#endif