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Fixed blocking open bug when using blocking audio writes

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--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%4097
This commit is contained in:
Sam Lantinga 2001-07-09 15:46:41 +00:00
parent 503838661e
commit c8f2e030dc
1 changed files with 12 additions and 4 deletions
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16
src/audio/dsp/SDL_dspaudio.c
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@ -58,11 +58,7 @@ static char rcsid =
/* Open the audio device for playback, and don't block if busy */ /* Open the audio device for playback, and don't block if busy */
#define USE_BLOCKING_WRITES #define USE_BLOCKING_WRITES
#ifdef USE_BLOCKING_WRITES
#define OPEN_FLAGS O_WRONLY
#else
#define OPEN_FLAGS (O_WRONLY|O_NONBLOCK) #define OPEN_FLAGS (O_WRONLY|O_NONBLOCK)
#endif
/* Audio driver functions */ /* Audio driver functions */
static int DSP_OpenAudio(_THIS, SDL_AudioSpec *spec); static int DSP_OpenAudio(_THIS, SDL_AudioSpec *spec);
@ -339,6 +335,18 @@ static int DSP_OpenAudio(_THIS, SDL_AudioSpec *spec)
} }
mixbuf = NULL; mixbuf = NULL;
#ifdef USE_BLOCKING_WRITES
/* Make the file descriptor use blocking writes with fcntl() */
{ long flags;
flags = fcntl(audio_fd, F_GETFL);
flags &= ~O_NONBLOCK;
if ( fcntl(audio_fd, F_SETFL, flags) < 0 ) {
SDL_SetError("Couldn't set audio blocking mode");
return(-1);
}
}
#endif
/* Get a list of supported hardware formats */ /* Get a list of supported hardware formats */
if ( ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &value) < 0 ) { if ( ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &value) < 0 ) {
SDL_SetError("Couldn't get audio format list"); SDL_SetError("Couldn't get audio format list");