Mercurial > sdl-ios-xcode
view src/audio/SDL_sysaudio.h @ 638:b0108e9dea53
Date: Sun, 11 May 2003 19:59:06 +0300
From: Pasi K?rkk?inen
Subject: [PATCH] fix SDL OpenGL segfault with DRI/Mesa drivers and Glew
Hello!
The attached patch fixes a bug in SDL which causes SDL to crash in
X11_GL_Shutdown() if you are using DRI/Mesa drivers AND glew
(http://glew.sf.net).
The bug is caused by a namespace collision affecting dlsym() to fetch wrong
pointer for glXReleaseBuffersMESA() (uninitialized pointer from glew because
the extension is NOT supported by the driver) and then SDL calling it in
X11_GL_Shutdown().
SDL should check if the glXReleaseBuffersMESA() is really supported by the
driver (from the extensions string) before calling it.
Attached patch adds extension string parsing to check if
glXReleaseBuffersMESA() is really supported (and this way
prevents the segfault).
Availability of the extensions should be _always_ checked from the
extensions string rather than using dlsym()!
Please add it to the next version of SDL.
Thanks to gltron and author of glew to help fixing this.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sat, 28 Jun 2003 17:27:33 +0000 |
parents | 550bccdf04bd |
children | 594422ab8f9f |
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/* 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 */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif #ifndef _SDL_sysaudio_h #define _SDL_sysaudio_h #include "SDL_mutex.h" #include "SDL_thread.h" /* The SDL audio driver */ typedef struct SDL_AudioDevice SDL_AudioDevice; /* Define the SDL audio driver structure */ #define _THIS SDL_AudioDevice *_this #ifndef _STATUS #define _STATUS SDL_status *status #endif struct SDL_AudioDevice { /* * * */ /* The name of this audio driver */ const char *name; /* * * */ /* The description of this audio driver */ const char *desc; /* * * */ /* Public driver functions */ int (*OpenAudio)(_THIS, SDL_AudioSpec *spec); void (*ThreadInit)(_THIS); /* Called by audio thread at start */ void (*WaitAudio)(_THIS); void (*PlayAudio)(_THIS); Uint8 *(*GetAudioBuf)(_THIS); void (*WaitDone)(_THIS); void (*CloseAudio)(_THIS); /* * * */ /* Lock / Unlock functions added for the Mac port */ void (*LockAudio)(_THIS); void (*UnlockAudio)(_THIS); /* * * */ /* Data common to all devices */ /* The current audio specification (shared with audio thread) */ SDL_AudioSpec spec; /* An audio conversion block for audio format emulation */ SDL_AudioCVT convert; /* Current state flags */ int enabled; int paused; int opened; /* Fake audio buffer for when the audio hardware is busy */ Uint8 *fake_stream; /* A semaphore for locking the mixing buffers */ SDL_mutex *mixer_lock; /* A thread to feed the audio device */ SDL_Thread *thread; Uint32 threadid; /* * * */ /* Data private to this driver */ struct SDL_PrivateAudioData *hidden; /* * * */ /* The function used to dispose of this structure */ void (*free)(_THIS); }; #undef _THIS typedef struct AudioBootStrap { const char *name; const char *desc; int (*available)(void); SDL_AudioDevice *(*create)(int devindex); } AudioBootStrap; #ifdef OPENBSD_AUDIO_SUPPORT extern AudioBootStrap OPENBSD_AUDIO_bootstrap; #endif #ifdef OSS_SUPPORT extern AudioBootStrap DSP_bootstrap; extern AudioBootStrap DMA_bootstrap; #endif #ifdef ALSA_SUPPORT extern AudioBootStrap ALSA_bootstrap; #endif #ifdef SUNAUDIO_SUPPORT extern AudioBootStrap SUNAUDIO_bootstrap; #endif #ifdef DMEDIA_SUPPORT extern AudioBootStrap DMEDIA_bootstrap; #endif #ifdef ARTSC_SUPPORT extern AudioBootStrap ARTSC_bootstrap; #endif #ifdef ESD_SUPPORT extern AudioBootStrap ESD_bootstrap; #endif #ifdef NAS_SUPPORT extern AudioBootStrap NAS_bootstrap; #endif #ifdef ENABLE_DIRECTX extern AudioBootStrap DSOUND_bootstrap; #endif #ifdef ENABLE_WINDIB extern AudioBootStrap WAVEOUT_bootstrap; #endif #ifdef _AIX extern AudioBootStrap Paud_bootstrap; #endif #ifdef __BEOS__ extern AudioBootStrap BAUDIO_bootstrap; #endif #if defined(macintosh) || TARGET_API_MAC_CARBON extern AudioBootStrap SNDMGR_bootstrap; #endif #ifdef ENABLE_AHI extern AudioBootStrap AHI_bootstrap; #endif #ifdef MINTAUDIO_SUPPORT extern AudioBootStrap MINTAUDIO_bootstrap; #endif #ifdef DISKAUD_SUPPORT extern AudioBootStrap DISKAUD_bootstrap; #endif #ifdef ENABLE_DC extern AudioBootStrap DCAUD_bootstrap; #endif #ifdef DRENDERER_SUPPORT extern AudioBootStrap DRENDERER_bootstrap; #endif /* This is the current audio device */ extern SDL_AudioDevice *current_audio; #endif /* _SDL_sysaudio_h */