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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 <botan/mutex.h>
#if defined(BOTAN_TARGET_OS_HAS_THREADS)
#include <condition_variable>
#endif
namespace Botan {
#if defined(BOTAN_TARGET_OS_HAS_THREADS)
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;
mutex_type m_mutex;
std::condition_variable m_cond;
};
#endif
}
#endif
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