From 81ebb07c56a28aa7ca47c38eb44690025a9dd6b9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?K=C5=91v=C3=A1g=C3=B3=2C=20Zolt=C3=A1n?= Date: Wed, 3 Jun 2015 23:03:55 +0200 Subject: sdlaudio: do not allow multiple instances MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Since SDL uses a lot of global data, we can't create independent instances of sdl audio backend. Signed-off-by: Kővágó, Zoltán Signed-off-by: Gerd Hoffmann --- audio/sdlaudio.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'audio') diff --git a/audio/sdlaudio.c b/audio/sdlaudio.c index b95a7e0ab4..1140f2ea0a 100644 --- a/audio/sdlaudio.c +++ b/audio/sdlaudio.c @@ -55,6 +55,7 @@ static struct SDLAudioState { SDL_mutex *mutex; SDL_sem *sem; int initialized; + bool driver_created; } glob_sdl; typedef struct SDLAudioState SDLAudioState; @@ -393,6 +394,10 @@ static int sdl_ctl_out (HWVoiceOut *hw, int cmd, ...) static void *sdl_audio_init (void) { SDLAudioState *s = &glob_sdl; + if (s->driver_created) { + sdl_logerr("Can't create multiple sdl backends\n"); + return NULL; + } if (SDL_InitSubSystem (SDL_INIT_AUDIO)) { sdl_logerr ("SDL failed to initialize audio subsystem\n"); @@ -414,6 +419,7 @@ static void *sdl_audio_init (void) return NULL; } + s->driver_created = true; return s; } @@ -424,6 +430,7 @@ static void sdl_audio_fini (void *opaque) SDL_DestroySemaphore (s->sem); SDL_DestroyMutex (s->mutex); SDL_QuitSubSystem (SDL_INIT_AUDIO); + s->driver_created = false; } static struct audio_option sdl_options[] = { -- cgit v1.2.1