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/*
* (C) 2016 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_UTIL_MUTEX_H_
#define BOTAN_UTIL_MUTEX_H_
#include <botan/types.h>
#if defined(BOTAN_TARGET_OS_HAS_THREADS)
#include <mutex>
namespace Botan {
template<typename T> using lock_guard_type = std::lock_guard<T>;
typedef std::mutex mutex_type;
}
#elif defined(BOTAN_TARGET_OS_TYPE_IS_UNIKERNEL) || defined(BOTAN_TARGET_OS_IS_LLVM)
// No threads
namespace Botan {
template<typename Mutex>
class lock_guard final
{
public:
explicit lock_guard(Mutex& m) : m_mutex(m)
{ m_mutex.lock(); }
~lock_guard() { m_mutex.unlock(); }
lock_guard(const lock_guard& other) = delete;
lock_guard& operator=(const lock_guard& other) = delete;
private:
Mutex& m_mutex;
};
class noop_mutex final
{
public:
void lock() {}
void unlock() {}
};
typedef noop_mutex mutex_type;
template<typename T> using lock_guard_type = lock_guard<T>;
}
#else
#error "Threads unexpectedly disabled in non unikernel build"
#endif
#endif
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