--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/libsdl-trunk/src/cdrom/macosx/SDLOSXCAGuard.c Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,199 @@
+/*
+ SDL - Simple DirectMedia Layer
+ Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
+
+ This library 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 library 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with this library; if not, write to the Free
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ Sam Lantinga
+ slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/*
+ Note: This file hasn't been modified so technically we have to keep the disclaimer :-(
+
+ Copyright: © Copyright 2002 Apple Computer, Inc. All rights reserved.
+
+ Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
+ ("Apple") in consideration of your agreement to the following terms, and your
+ use, installation, modification or redistribution of this Apple software
+ constitutes acceptance of these terms. If you do not agree with these terms,
+ please do not use, install, modify or redistribute this Apple software.
+
+ In consideration of your agreement to abide by the following terms, and subject
+ to these terms, Apple grants you a personal, non-exclusive license, under AppleÕs
+ copyrights in this original Apple software (the "Apple Software"), to use,
+ reproduce, modify and redistribute the Apple Software, with or without
+ modifications, in source and/or binary forms; provided that if you redistribute
+ the Apple Software in its entirety and without modifications, you must retain
+ this notice and the following text and disclaimers in all such redistributions of
+ the Apple Software. Neither the name, trademarks, service marks or logos of
+ Apple Computer, Inc. may be used to endorse or promote products derived from the
+ Apple Software without specific prior written permission from Apple. Except as
+ expressly stated in this notice, no other rights or licenses, express or implied,
+ are granted by Apple herein, including but not limited to any patent rights that
+ may be infringed by your derivative works or by other works in which the Apple
+ Software may be incorporated.
+
+ The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
+ WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
+ WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
+ COMBINATION WITH YOUR PRODUCTS.
+
+ IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
+ OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT
+ (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
+ ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/*=============================================================================
+ CAGuard.cp
+
+=============================================================================*/
+
+/*=============================================================================
+ Includes
+ =============================================================================*/
+
+/*
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+*/
+#include "SDL_stdinc.h"
+
+/*#define NDEBUG 1*/
+/*
+#include <assert.h>
+*/
+#define assert(X)
+
+
+#include "SDLOSXCAGuard.h"
+
+/*#warning Need a try-based Locker too*/
+/*=============================================================================
+ SDLOSXCAGuard
+ =============================================================================*/
+
+static int SDLOSXCAGuard_Lock(SDLOSXCAGuard *cag)
+{
+ int theAnswer = 0;
+
+ if(pthread_self() != cag->mOwner)
+ {
+ OSStatus theError = pthread_mutex_lock(&cag->mMutex);
+ (void)theError;
+ assert(theError == 0);
+ cag->mOwner = pthread_self();
+ theAnswer = 1;
+ }
+
+ return theAnswer;
+}
+
+static void SDLOSXCAGuard_Unlock(SDLOSXCAGuard *cag)
+{
+ OSStatus theError;
+ assert(pthread_self() == cag->mOwner);
+
+ cag->mOwner = 0;
+ theError = pthread_mutex_unlock(&cag->mMutex);
+ (void)theError;
+ assert(theError == 0);
+}
+
+static int SDLOSXCAGuard_Try (SDLOSXCAGuard *cag, int *outWasLocked)
+{
+ int theAnswer = 0;
+ *outWasLocked = 0;
+
+ if (pthread_self() == cag->mOwner) {
+ theAnswer = 1;
+ *outWasLocked = 0;
+ } else {
+ OSStatus theError = pthread_mutex_trylock(&cag->mMutex);
+ if (theError == 0) {
+ cag->mOwner = pthread_self();
+ theAnswer = 1;
+ *outWasLocked = 1;
+ }
+ }
+
+ return theAnswer;
+}
+
+static void SDLOSXCAGuard_Wait(SDLOSXCAGuard *cag)
+{
+ OSStatus theError;
+ assert(pthread_self() == cag->mOwner);
+
+ cag->mOwner = 0;
+
+ theError = pthread_cond_wait(&cag->mCondVar, &cag->mMutex);
+ (void)theError;
+ assert(theError == 0);
+ cag->mOwner = pthread_self();
+}
+
+static void SDLOSXCAGuard_Notify(SDLOSXCAGuard *cag)
+{
+ OSStatus theError = pthread_cond_signal(&cag->mCondVar);
+ (void)theError;
+ assert(theError == 0);
+}
+
+
+SDLOSXCAGuard *new_SDLOSXCAGuard(void)
+{
+ OSStatus theError;
+ SDLOSXCAGuard *cag = (SDLOSXCAGuard *) SDL_malloc(sizeof (SDLOSXCAGuard));
+ if (cag == NULL)
+ return NULL;
+ SDL_memset(cag, '\0', sizeof (*cag));
+
+ #define SET_SDLOSXCAGUARD_METHOD(m) cag->m = SDLOSXCAGuard_##m
+ SET_SDLOSXCAGUARD_METHOD(Lock);
+ SET_SDLOSXCAGUARD_METHOD(Unlock);
+ SET_SDLOSXCAGUARD_METHOD(Try);
+ SET_SDLOSXCAGUARD_METHOD(Wait);
+ SET_SDLOSXCAGUARD_METHOD(Notify);
+ #undef SET_SDLOSXCAGUARD_METHOD
+
+ theError = pthread_mutex_init(&cag->mMutex, NULL);
+ (void)theError;
+ assert(theError == 0);
+
+ theError = pthread_cond_init(&cag->mCondVar, NULL);
+ (void)theError;
+ assert(theError == 0);
+
+ cag->mOwner = 0;
+ return cag;
+}
+
+void delete_SDLOSXCAGuard(SDLOSXCAGuard *cag)
+{
+ if (cag != NULL)
+ {
+ pthread_mutex_destroy(&cag->mMutex);
+ pthread_cond_destroy(&cag->mCondVar);
+ SDL_free(cag);
+ }
+}
+