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thread-protect get_null_sound()

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This commit is contained in:
David Rose 2006-08-30 16:55:04 +00:00
parent b3c42f22ac
commit 234724321e
2 changed files with 32 additions and 10 deletions
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35
panda/src/audio/audioManager.cxx
View File

@ -19,7 +19,7 @@
#include "config_audio.h"
#include "audioManager.h"
#include "atomicAdjust.h"
#include "nullAudioManager.h"
#include "load_dso.h"
@ -88,7 +88,21 @@ PT(AudioManager) AudioManager::create_AudioManager() {
// Access: Published, Virtual
// Description:
////////////////////////////////////////////////////////////////////
AudioManager::~AudioManager() {
AudioManager::
~AudioManager() {
if (_null_sound != (AudioSound *)NULL) {
unref_delete(_null_sound);
}
}
////////////////////////////////////////////////////////////////////
// Function: AudioManager::Constructor
// Access: Protected
// Description:
////////////////////////////////////////////////////////////////////
AudioManager::
AudioManager() {
_null_sound = NULL;
}
////////////////////////////////////////////////////////////////////
@ -100,7 +114,8 @@ AudioManager::~AudioManager() {
// change your mind and want to play sounds again, you
// will have to recreate all of these objects.
////////////////////////////////////////////////////////////////////
void AudioManager::shutdown() {
void AudioManager::
shutdown() {
}
////////////////////////////////////////////////////////////////////
@ -111,10 +126,20 @@ void AudioManager::shutdown() {
// sound. This same object may also be returned by
// get_sound() if it fails.
////////////////////////////////////////////////////////////////////
PT(AudioSound) AudioManager::get_null_sound() {
PT(AudioSound) AudioManager::
get_null_sound() {
if (_null_sound == (AudioSound *)NULL) {
_null_sound = new NullAudioSound;
AudioSound *new_sound = new NullAudioSound;
new_sound->ref();
void *result = AtomicAdjust::compare_and_exchange_ptr((void * TVOLATILE &)_null_sound, (void *)NULL, (void *)new_sound);
if (result != NULL) {
// Someone else must have assigned the AudioSound first. OK.
nassertr(_null_sound != new_sound, NULL);
unref_delete(new_sound);
}
nassertr(_null_sound != NULL, NULL);
}
return _null_sound;
}

7
panda/src/audio/audioManager.h
View File

@ -216,12 +216,9 @@ protected:
// best flexibility.
static Create_AudioManager_proc* _create_AudioManager;
PT(AudioSound) _null_sound;
AudioManager() {
// intentionally blank.
}
AudioSound *_null_sound;
AudioManager();
public:
static TypeHandle get_class_type() {