pandory500/SDL-mirror
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The audio lock and unlock functions are now a part of the driver.

Browse source 
The MacOS audio locking has been implemented, courtesy of Ryan Gordon

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40323
This commit is contained in:
Sam Lantinga 2002-03-30 19:48:56 +00:00
parent 2341158b2a
commit a55059b4d3
2 changed files with 29 additions and 10 deletions
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34
src/audio/SDL_audio.c
View file

@ -230,6 +230,22 @@ int SDL_RunAudio(void *audiop)
return(0);
}
static void SDL_LockAudio_Default(SDL_AudioDevice *audio)
{
if ( audio->thread && (SDL_ThreadID() == audio->threadid) ) {
return;
}
SDL_mutexP(audio->mixer_lock);
}
static void SDL_UnlockAudio_Default(SDL_AudioDevice *audio)
{
if ( audio->thread && (SDL_ThreadID() == audio->threadid) ) {
return;
}
SDL_mutexV(audio->mixer_lock);
}
int SDL_AudioInit(const char *driver_name)
{
SDL_AudioDevice *audio;
@ -309,6 +325,10 @@ int SDL_AudioInit(const char *driver_name)
current_audio = audio;
if ( current_audio ) {
current_audio->name = bootstrap[i]->name;
if ( !current_audio->LockAudio && !current_audio->UnlockAudio ) {
current_audio->LockAudio = SDL_LockAudio_Default;
current_audio->UnlockAudio = SDL_UnlockAudio_Default;
}
}
return(0);
}
@ -506,11 +526,8 @@ void SDL_LockAudio (void)
SDL_AudioDevice *audio = current_audio;
/* Obtain a lock on the mixing buffers */
if ( audio ) {
if ( audio->thread && (SDL_ThreadID() == audio->threadid) ) {
return;
}
SDL_mutexP(audio->mixer_lock);
if ( audio && audio->LockAudio ) {
audio->LockAudio(audio);
}
}
@ -519,11 +536,8 @@ void SDL_UnlockAudio (void)
SDL_AudioDevice *audio = current_audio;
/* Release lock on the mixing buffers */
if ( audio ) {
if ( audio->thread && (SDL_ThreadID() == audio->threadid) ) {
return;
}
SDL_mutexV(audio->mixer_lock);
if ( audio && audio->UnlockAudio ) {
audio->UnlockAudio(audio);
}
}

5
src/audio/SDL_sysaudio.h
View file

@ -58,6 +58,11 @@ struct SDL_AudioDevice {
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 */