ilmthreadmutexposix.cpp

image converter source code

///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2005, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
// 
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
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// notice, this list of conditions and the following disclaimer.
// *       Redistributions in binary form must reproduce the above
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// in the documentation and/or other materials provided with the
// distribution.
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// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission. 
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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///////////////////////////////////////////////////////////////////////////

//-----------------------------------------------------------------------------
//
//	class Mutex -- implementation for
//	platforms that support Posix threads
//
//-----------------------------------------------------------------------------

#include "IlmBaseConfig.h"

#if HAVE_PTHREAD

#include "IlmThreadMutex.h"
#include "Iex.h"
#include <assert.h>

namespace IlmThread {


Mutex::Mutex ()
{
    if (int error = ::pthread_mutex_init (&_mutex, 0))
        Iex::throwErrnoExc ("Cannot initialize mutex (%T).", error);
}


Mutex::~Mutex ()
{
    int error = ::pthread_mutex_destroy (&_mutex);
    assert (error == 0);
}


void
Mutex::lock () const
{
    if (int error = ::pthread_mutex_lock (&_mutex))
        Iex::throwErrnoExc ("Cannot lock mutex (%T).", error);
}


void
Mutex::unlock () const
{
    if (int error = ::pthread_mutex_unlock (&_mutex))
        Iex::throwErrnoExc ("Cannot unlock mutex (%T).", error);
}


} // namespace IlmThread

#endif