86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/*******************************************************************
|
|
*
|
|
* 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 */
|