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/* SPDX-License-Identifier: BSL-1.0 OR BSD-3-Clause */
#ifndef MPT_MUTEX_MUTEX_HPP
#define MPT_MUTEX_MUTEX_HPP
#include "mpt/base/detect.hpp"
#include "mpt/base/namespace.hpp"
#if !MPT_PLATFORM_MULTITHREADED
#define MPT_MUTEX_NONE 1
#elif MPT_COMPILER_GENERIC
#define MPT_MUTEX_STD 1
#elif MPT_OS_WINDOWS && MPT_LIBCXX_GNU && !defined(_GLIBCXX_HAS_GTHREADS) && defined(MPT_WITH_MINGWSTDTHREADS)
#define MPT_MUTEX_STD 1
#elif MPT_OS_WINDOWS && MPT_LIBCXX_GNU && !defined(_GLIBCXX_HAS_GTHREADS)
#define MPT_MUTEX_WIN32 1
#else
#define MPT_MUTEX_STD 1
#endif
#ifndef MPT_MUTEX_STD
#define MPT_MUTEX_STD 0
#endif
#ifndef MPT_MUTEX_WIN32
#define MPT_MUTEX_WIN32 0
#endif
#ifndef MPT_MUTEX_NONE
#define MPT_MUTEX_NONE 0
#endif
#if MPT_MUTEX_STD
#if !MPT_COMPILER_GENERIC && (defined(__MINGW32__) || defined(__MINGW64__)) && !defined(_GLIBCXX_HAS_GTHREADS) && defined(MPT_WITH_MINGWSTDTHREADS)
#include <mingw.mutex.h>
#else
#include <mutex>
#ifdef MPT_COMPILER_QUIRK_COMPLEX_STD_MUTEX
#include <shared_mutex>
#include <type_traits>
#endif
#endif
#elif MPT_MUTEX_WIN32
#include <windows.h>
#endif // MPT_MUTEX
namespace mpt {
inline namespace MPT_INLINE_NS {
#if MPT_MUTEX_STD
#ifdef MPT_COMPILER_QUIRK_COMPLEX_STD_MUTEX
using mutex = std::conditional<sizeof(std::shared_mutex) < sizeof(std::mutex), std::shared_mutex, std::mutex>::type;
#else
using mutex = std::mutex;
#endif
using recursive_mutex = std::recursive_mutex;
#elif MPT_MUTEX_WIN32
#if (_WIN32_WINNT >= 0x0600) // _WIN32_WINNT_VISTA
// compatible with c++11 std::mutex, can eventually be replaced without touching any usage site
class mutex {
private:
SRWLOCK impl = SRWLOCK_INIT;
public:
mutex() = default;
~mutex() = default;
void lock() {
AcquireSRWLockExclusive(&impl);
}
bool try_lock() {
return TryAcquireSRWLockExclusive(&impl) ? true : false;
}
void unlock() {
ReleaseSRWLockExclusive(&impl);
}
};
#else // !_WIN32_WINNT_VISTA
// compatible with c++11 std::mutex, can eventually be replaced without touching any usage site
class mutex {
private:
CRITICAL_SECTION impl;
public:
mutex() {
InitializeCriticalSection(&impl);
}
~mutex() {
DeleteCriticalSection(&impl);
}
void lock() {
EnterCriticalSection(&impl);
}
bool try_lock() {
return TryEnterCriticalSection(&impl) ? true : false;
}
void unlock() {
LeaveCriticalSection(&impl);
}
};
#endif // _WIN32_WINNT_VISTA
// compatible with c++11 std::recursive_mutex, can eventually be replaced without touching any usage site
class recursive_mutex {
private:
CRITICAL_SECTION impl;
public:
recursive_mutex() {
InitializeCriticalSection(&impl);
}
~recursive_mutex() {
DeleteCriticalSection(&impl);
}
void lock() {
EnterCriticalSection(&impl);
}
bool try_lock() {
return TryEnterCriticalSection(&impl) ? true : false;
}
void unlock() {
LeaveCriticalSection(&impl);
}
};
#else // MPT_MUTEX_NONE
class mutex {
public:
mutex() {
return;
}
~mutex() {
return;
}
void lock() {
return;
}
bool try_lock() {
return true;
}
void unlock() {
return;
}
};
class recursive_mutex {
public:
recursive_mutex() {
return;
}
~recursive_mutex() {
return;
}
void lock() {
return;
}
bool try_lock() {
return true;
}
void unlock() {
return;
}
};
#endif // MPT_MUTEX
#if MPT_MUTEX_STD
template <typename T>
using lock_guard = std::lock_guard<T>;
#else // !MPT_MUTEX_STD
// compatible with c++11 std::lock_guard, can eventually be replaced without touching any usage site
template <typename mutex_type>
class lock_guard {
private:
mutex_type & mutex;
public:
lock_guard(mutex_type & m)
: mutex(m) {
mutex.lock();
}
~lock_guard() {
mutex.unlock();
}
};
#endif // MPT_MUTEX_STD
} // namespace MPT_INLINE_NS
} // namespace mpt
#endif // MPT_MUTEX_MUTEX_HPP
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