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/*******************************************************************
*
* ttmutex.c 1.0
*
* Mutual exclusion object, single-threaded implementation
*
* Copyright 1996-1999 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* This file is part of the FreeType project, and may only be used
* modified and distributed under the terms of the FreeType project
* license, LICENSE.TXT. By continuing to use, modify, or distribute
* this file you indicate that you have read the license and
* understand and accept it fully.
*
* NOTE: This is a generic non-functional implementation
* that you are welcome to refine for your own system.
*
* Please name your system-specific source with a
* different name (like ttmutex-os2.c or ttmutex-linux.c)
* and change your makefile accordingly.
*
******************************************************************/
#include "ttmutex.h"
/* required by the tracing mode */
#undef TT_COMPONENT
#define TT_COMPONENT trace_mutex
/* ANSI C prevents the compilation of empty units. We thus introduce */
/* a dummy typedef to get rid of compiler warnings/errors. */
/* Note that gcc's -ansi -pedantic does not report any error here. */
/* Watcom, VC++ or Borland C++ do however. */
typedef void _ttmutex_to_satisfy_ANSI_C_;
#ifdef TT_CONFIG_OPTION_THREAD_SAFE
LOCAL_FUNC
void TT_Mutex_Create ( TMutex* mutex )
{
*mutex = (void*)-1;
/* Replace this line with your own mutex creation code */
}
LOCAL_FUNC
void TT_Mutex_Delete ( TMutex* mutex )
{
*mutex = (void*)0;
/* Replace this line with your own mutex destruction code */
}
LOCAL_FUNC
void TT_Mutex_Lock ( TMutex* mutex )
{
/* NOTE: It is legal to call this function with a NULL argument */
/* in which case an immediate return is appropriate. */
if ( !mutex )
return;
; /* Insert your own mutex locking code here */
}
LOCAL_FUNC
void TT_Mutex_Release( TMutex* mutex )
{
/* NOTE: It is legal to call this function with a NULL argument */
/* in which case an immediate return is appropriate */
if ( !mutex )
return;
; /* Insert your own mutex release code here */
}
#endif /* TT_CONFIG_OPTION_THREAD_SAFE */
/* END */
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