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Fences access to common resources between the possible SDL_mixer effect thread and the rest of the audio code.

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git-svn-id: https://svn.eduke32.com/eduke32@1583 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
plagman 2010-01-11 17:25:47 +00:00
parent 4917be2439
commit f0be341352
2 changed files with 15 additions and 8 deletions
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2
polymer/eduke32/build/src/sdlayer.c
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@ -582,7 +582,7 @@ void grabmouse(char a)
if (a != mouseacquired)
{
// #ifndef DEBUGGINGAIDS
#if 1
#if 0
SDL_GrabMode g;
g = SDL_WM_GrabInput(a ? SDL_GRAB_ON : SDL_GRAB_OFF);

21
polymer/eduke32/source/jaudiolib/src/driver_sdl.c
View file

@ -25,6 +25,7 @@
#include <SDL/SDL.h>
#include <SDL/SDL_mixer.h>
#include <SDL/SDL_thread.h>
#include "driver_sdl.h"
#ifndef UNREFERENCED_PARAMETER
@ -54,7 +55,8 @@ static void ( *MixCallBack )( void ) = 0;
static Mix_Chunk *DummyChunk = NULL;
static uint8_t *DummyBuffer = NULL;
// static int32_t InterruptsDisabled = 0;
static int32_t InterruptsDisabled = 0;
static SDL_mutex *EffectFence;
static void fillData(int32_t chan, void *ptr, int32_t remaining, void *udata)
{
@ -64,6 +66,8 @@ static void fillData(int32_t chan, void *ptr, int32_t remaining, void *udata)
UNREFERENCED_PARAMETER(chan);
UNREFERENCED_PARAMETER(udata);
SDL_LockMutex(EffectFence);
while (remaining > 0) {
if (MixBufferUsed == MixBufferSize) {
MixCallBack();
@ -90,6 +94,8 @@ static void fillData(int32_t chan, void *ptr, int32_t remaining, void *udata)
remaining -= len;
}
}
SDL_UnlockMutex(EffectFence);
}
@ -165,6 +171,8 @@ int32_t SDLDrv_PCM_Init(int32_t *mixrate, int32_t *numchannels, int32_t *sampleb
//Mix_SetPostMix(fillData, NULL);
EffectFence = SDL_CreateMutex();
// channel 0 and 1 are actual sounds
// dummy channel 2 runs our fillData() callback as an effect
Mix_RegisterEffect(2, fillData, NULL, NULL);
@ -200,6 +208,9 @@ void SDLDrv_PCM_Shutdown(void)
}
Mix_CloseAudio();
SDL_DestroyMutex(EffectFence);
Initialised = 0;
}
@ -245,21 +256,17 @@ void SDLDrv_PCM_StopPlayback(void)
void SDLDrv_PCM_Lock(void)
{
/*
if (InterruptsDisabled++)
return;
SDL_LockAudio();*/
SDL_LockMutex(EffectFence);
}
void SDLDrv_PCM_Unlock(void)
{
/*
if (--InterruptsDisabled)
return;
SDL_UnlockAudio();*/
SDL_UnlockMutex(EffectFence);
}