/usr/include/podofo/base/util/PdfMutexImpl_pthread.h is in libpodofo-dev 0.9.4-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2008 by Dominik Seichter, Craig Ringer *
* domseichter@web.de *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Library General Public License as *
* published by the Free Software Foundation; either version 2 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 Library General Public *
* License along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
* *
* In addition, as a special exception, the copyright holders give *
* permission to link the code of portions of this program with the *
* OpenSSL library under certain conditions as described in each *
* individual source file, and distribute linked combinations *
* including the two. *
* You must obey the GNU General Public License in all respects *
* for all of the code used other than OpenSSL. If you modify *
* file(s) with this exception, you may extend this exception to your *
* version of the file(s), but you are not obligated to do so. If you *
* do not wish to do so, delete this exception statement from your *
* version. If you delete this exception statement from all source *
* files in the program, then also delete it here. *
***************************************************************************/
#include "../PdfDefines.h"
#include "../PdfDefinesPrivate.h"
#if ! defined(PODOFO_MULTI_THREAD)
#error "Not a multi-thread build. PdfMutex_null.h should be used instead"
#endif
#if defined(_WIN32)
#error "win32 build. PdfMutex_win32.h should be used instead"
#endif
#include <pthread.h>
#include <errno.h>
namespace PoDoFo {
namespace Util {
/**
* A platform independent reentrant mutex, pthread implementation.
*
* PdfMutex is *NOT* part of PoDoFo's public API.
*
* This is the pthread implementation, which is
* entirely inline.
*/
class PdfMutexImpl {
pthread_mutex_t m_mutex;
public:
inline PdfMutexImpl();
inline ~PdfMutexImpl();
inline void Init( const pthread_mutexattr_t *attr );
/**
* Lock the mutex
*/
inline void Lock();
/**
* Try locking the mutex.
*
* \returns true if the mutex was locked
* \returns false if the mutex is already locked
* by some other thread
*/
inline bool TryLock();
/**
* Unlock the mutex
*/
inline void UnLock();
};
PdfMutexImpl::PdfMutexImpl() {
pthread_mutexattr_t attr;
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init( &m_mutex, &attr );
}
PdfMutexImpl::~PdfMutexImpl()
{
pthread_mutex_destroy( &m_mutex );
}
void PdfMutexImpl::Lock()
{
if( pthread_mutex_lock( &m_mutex ) != 0 )
{
PODOFO_RAISE_ERROR( ePdfError_MutexError );
}
}
bool PdfMutexImpl::TryLock()
{
int nRet = pthread_mutex_trylock( &m_mutex );
if( nRet == 0 )
return true;
else if( nRet == EBUSY )
return false;
else
{
PODOFO_RAISE_ERROR( ePdfError_MutexError );
}
}
void PdfMutexImpl::UnLock()
{
if( pthread_mutex_unlock( &m_mutex ) != 0 )
{
PODOFO_RAISE_ERROR( ePdfError_MutexError );
}
}
}; // Util
}; // PoDoFo
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