Mercurial > sdl-ios-xcode

annotate src/cdrom/macosx/SDLOSXCAGuard.h @ 3796:b19680c84cdf SDL-ryan-multiple-audio-device

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Bunch of 1.3 audio cleanups to remove FIXMEs, get driver specific crap out of the core and into the drivers where it belongs, and push generic responsibilities out of the drivers and into the core where they belong.
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 04 Oct 2006 19:54:23 +0000
parents c121d94672cb
children 99210400e8b9
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /*
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25 Note: This file hasn't been modified so technically we have to keep the disclaimer :-(
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27
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28 Copyright: © Copyright 2002 Apple Computer, Inc. All rights reserved.
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29
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30 Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
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31 ("Apple") in consideration of your agreement to the following terms, and your
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32 use, installation, modification or redistribution of this Apple software
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33 constitutes acceptance of these terms. If you do not agree with these terms,
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34 please do not use, install, modify or redistribute this Apple software.
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35
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36 In consideration of your agreement to abide by the following terms, and subject
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37 to these terms, Apple grants you a personal, non-exclusive license, under AppleÕs
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38 copyrights in this original Apple software (the "Apple Software"), to use,
71a2648acc75 Replaced Mac OS X's C++ cdrom code with almost-direct translation to C. Sam
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39 reproduce, modify and redistribute the Apple Software, with or without
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40 modifications, in source and/or binary forms; provided that if you redistribute
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41 the Apple Software in its entirety and without modifications, you must retain
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42 this notice and the following text and disclaimers in all such redistributions of
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43 the Apple Software. Neither the name, trademarks, service marks or logos of
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44 Apple Computer, Inc. may be used to endorse or promote products derived from the
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45 Apple Software without specific prior written permission from Apple. Except as
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46 expressly stated in this notice, no other rights or licenses, express or implied,
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47 are granted by Apple herein, including but not limited to any patent rights that
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48 may be infringed by your derivative works or by other works in which the Apple
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49 Software may be incorporated.
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50
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51 The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
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52 WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
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53 WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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54 PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
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55 COMBINATION WITH YOUR PRODUCTS.
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56
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57 IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
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58 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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59 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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60 ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
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61 OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT
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62 (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
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63 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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64 */
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65 /*=============================================================================
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66 CAGuard.h
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67
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68 =============================================================================*/
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69 #if !defined(__CAGuard_h__)
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70 #define __CAGuard_h__
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71
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72 /*=============================================================================
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73 Includes
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74 =============================================================================*/
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75
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76 #include <CoreAudio/CoreAudioTypes.h>
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77 #include <pthread.h>
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78
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79
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80 /*=============================================================================
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81 CAGuard
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82
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83 This is your typical mutex with signalling implemented via pthreads.
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84 Lock() will return true if and only if the guard is locked on that call.
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85 A thread that already has the guard will receive 'false' if it locks it
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86 again. Use of the stack-based CAGuard::Locker class is highly recommended
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87 to properly manage the recursive nesting. The Wait calls with timeouts
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88 will return true if and only if the timeout period expired. They will
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89 return false if they receive notification any other way.
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90 =============================================================================*/
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91
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92 typedef struct S_SDLOSXCAGuard
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93 {
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94
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95 /* Construction/Destruction */
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96 /*public:*/
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97 /* Actions */
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98 /*public:*/
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99 int (*Lock) (struct S_SDLOSXCAGuard * cag);
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100 void (*Unlock) (struct S_SDLOSXCAGuard * cag);
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101 int (*Try) (struct S_SDLOSXCAGuard * cag, int *outWasLocked); /* returns true if lock is free, false if not */
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102 void (*Wait) (struct S_SDLOSXCAGuard * cag);
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103 void (*Notify) (struct S_SDLOSXCAGuard * cag);
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104
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105 /* Implementation */
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106 /*protected:*/
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107 pthread_mutex_t mMutex;
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108 pthread_cond_t mCondVar;
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109 pthread_t mOwner;
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110 } SDLOSXCAGuard;
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111
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112 SDLOSXCAGuard *new_SDLOSXCAGuard(void);
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113 void delete_SDLOSXCAGuard(SDLOSXCAGuard * cag);
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114
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115 #endif
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116 /* vi: set ts=4 sw=4 expandtab: */