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/*
* DISTRHO Plugin Framework (DPF)
* Copyright (C) 2012-2014 Filipe Coelho <falktx@falktx.com>
*
* Permission to use, copy, modify, and/or distribute this software for any purpose with
* or without fee is hereby granted, provided that the above copyright notice and this
* permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
* TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef DISTRHO_MUTEX_HPP_INCLUDED
#define DISTRHO_MUTEX_HPP_INCLUDED
#include "../DistrhoUtils.hpp"
#ifdef DISTRHO_OS_WINDOWS
# include <winsock2.h>
# include <windows.h>
#endif
#include <pthread.h>
START_NAMESPACE_DISTRHO
// -----------------------------------------------------------------------
// Mutex class
class Mutex
{
public:
/*
* Constructor.
*/
Mutex() noexcept
{
pthread_mutex_init(&fMutex, nullptr);
}
/*
* Destructor.
*/
~Mutex() noexcept
{
pthread_mutex_destroy(&fMutex);
}
/*
* Lock the mutex.
*/
void lock() const noexcept
{
pthread_mutex_lock(&fMutex);
}
/*
* Try to lock the mutex.
* Returns true if successful.
*/
bool tryLock() const noexcept
{
return (pthread_mutex_trylock(&fMutex) == 0);
}
/*
* Unlock the mutex.
*/
void unlock() const noexcept
{
pthread_mutex_unlock(&fMutex);
}
private:
mutable pthread_mutex_t fMutex;
DISTRHO_PREVENT_HEAP_ALLOCATION
DISTRHO_DECLARE_NON_COPY_CLASS(Mutex)
};
// -----------------------------------------------------------------------
// RecursiveMutex class
class RecursiveMutex
{
public:
/*
* Constructor.
*/
RecursiveMutex() noexcept
{
#ifdef DISTRHO_OS_WINDOWS
InitializeCriticalSection(&fSection);
#else
pthread_mutexattr_t atts;
pthread_mutexattr_init(&atts);
pthread_mutexattr_settype(&atts, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&fMutex, &atts);
pthread_mutexattr_destroy(&atts);
#endif
}
/*
* Destructor.
*/
~RecursiveMutex() noexcept
{
#ifdef DISTRHO_OS_WINDOWS
DeleteCriticalSection(&fSection);
#else
pthread_mutex_destroy(&fMutex);
#endif
}
/*
* Lock the mutex.
*/
void lock() const noexcept
{
#ifdef DISTRHO_OS_WINDOWS
EnterCriticalSection(&fSection);
#else
pthread_mutex_lock(&fMutex);
#endif
}
/*
* Try to lock the mutex.
* Returns true if successful.
*/
bool tryLock() const noexcept
{
#ifdef DISTRHO_OS_WINDOWS
return (TryEnterCriticalSection(&fSection) != FALSE);
#else
return (pthread_mutex_trylock(&fMutex) == 0);
#endif
}
/*
* Unlock the mutex.
*/
void unlock() const noexcept
{
#ifdef DISTRHO_OS_WINDOWS
LeaveCriticalSection(&fSection);
#else
pthread_mutex_unlock(&fMutex);
#endif
}
private:
#ifdef DISTRHO_OS_WINDOWS
mutable CRITICAL_SECTION fSection;
#else
mutable pthread_mutex_t fMutex;
#endif
DISTRHO_PREVENT_HEAP_ALLOCATION
DISTRHO_DECLARE_NON_COPY_CLASS(RecursiveMutex)
};
// -----------------------------------------------------------------------
// Helper class to lock&unlock a mutex during a function scope.
template <class Mutex>
class ScopedLocker
{
public:
ScopedLocker(const Mutex& mutex) noexcept
: fMutex(mutex)
{
fMutex.lock();
}
~ScopedLocker() noexcept
{
fMutex.unlock();
}
private:
const Mutex& fMutex;
DISTRHO_PREVENT_HEAP_ALLOCATION
DISTRHO_DECLARE_NON_COPY_CLASS(ScopedLocker)
};
// -----------------------------------------------------------------------
// Helper class to unlock&lock a mutex during a function scope.
template <class Mutex>
class ScopedUnlocker
{
public:
ScopedUnlocker(const Mutex& mutex) noexcept
: fMutex(mutex)
{
fMutex.unlock();
}
~ScopedUnlocker() noexcept
{
fMutex.lock();
}
private:
const Mutex& fMutex;
DISTRHO_PREVENT_HEAP_ALLOCATION
DISTRHO_DECLARE_NON_COPY_CLASS(ScopedUnlocker)
};
// -----------------------------------------------------------------------
// Define types
typedef ScopedLocker<Mutex> MutexLocker;
typedef ScopedLocker<RecursiveMutex> RecursiveMutexLocker;
typedef ScopedUnlocker<Mutex> MutexUnlocker;
typedef ScopedUnlocker<RecursiveMutex> RecursiveMutexUnlocker;
// -----------------------------------------------------------------------
END_NAMESPACE_DISTRHO
#endif // DISTRHO_MUTEX_HPP_INCLUDED
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