Бычков Андрей
ba8bc27298
git-svn-id: svn://db.shs.com.ru/libs@1 a8b55f48-bf90-11e4-a774-851b48703e85
94 lines
2.2 KiB
C++
94 lines
2.2 KiB
C++
/*! \file pimutex.h
|
|
* \brief Mutex
|
|
*/
|
|
/*
|
|
PIP - Platform Independent Primitives
|
|
Mutex
|
|
Copyright (C) 2014 Ivan Pelipenko peri4ko@gmail.com
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef PIMUTEX_H
|
|
#define PIMUTEX_H
|
|
|
|
#include "piincludes.h"
|
|
|
|
class PIP_EXPORT PIMutex
|
|
{
|
|
public:
|
|
|
|
//! Constructs unlocked mutex
|
|
PIMutex();
|
|
|
|
~PIMutex();
|
|
|
|
|
|
//! \brief Lock mutex
|
|
//! \details If mutex is unlocked it set to locked state and returns immediate.
|
|
//! If mutex is already locked function blocks until mutex will be unlocked
|
|
void lock() {
|
|
#ifdef WINDOWS
|
|
WaitForSingleObject(mutex, INFINITE);
|
|
#else
|
|
pthread_mutex_lock(&mutex);
|
|
#endif
|
|
}
|
|
|
|
|
|
//! \brief Unlock mutex
|
|
//! \details In any case this function returns immediate
|
|
void unlock() {
|
|
#ifdef WINDOWS
|
|
ReleaseMutex(mutex);
|
|
#else
|
|
pthread_mutex_unlock(&mutex);
|
|
#endif
|
|
}
|
|
|
|
|
|
//! \brief Try to lock mutex
|
|
//! \details If mutex is unlocked it set to locked state and returns "true" immediate.
|
|
//! If mutex is already locked function returns immediate an returns "false"
|
|
bool tryLock() {
|
|
#ifdef WINDOWS
|
|
return (WaitForSingleObject(mutex, 0) == WAIT_OBJECT_0);
|
|
#else
|
|
return (pthread_mutex_trylock(&mutex) == 0);
|
|
#endif
|
|
}
|
|
|
|
private:
|
|
#ifdef WINDOWS
|
|
void *
|
|
#else
|
|
pthread_mutex_t
|
|
#endif
|
|
mutex;
|
|
|
|
};
|
|
|
|
|
|
class PIP_EXPORT PIMutexLocker
|
|
{
|
|
public:
|
|
PIMutexLocker(PIMutex * m): mutex(m) {mutex->lock();}
|
|
PIMutexLocker(PIMutex & m): mutex(&m) {mutex->lock();}
|
|
~PIMutexLocker() {mutex->unlock();}
|
|
private:
|
|
PIMutex * mutex;
|
|
};
|
|
|
|
#endif // PIMUTEX_H
|