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avoid potential race conditions during reset/etc by waiting till the emu thread got the message to pause

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This commit is contained in:
StapleButter
2017-09-22 01:33:18 +02:00
parent 332282c809
commit e298d50e76
1 changed files with 13 additions and 1 deletions
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14
src/libui_sdl/main.cpp
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@ -41,6 +41,7 @@ uiMenuItem* MenuItem_Stop;
SDL_Thread* EmuThread;
int EmuRunning;
volatile int EmuStatus;
bool RunningSomething;
char ROMPath[1024];
@ -98,6 +99,8 @@ int EmuThreadFunc(void* burp)
{
if (EmuRunning == 1)
{
EmuStatus = 1;
// emulate
u32 nlines = NDS::RunFrame();
@ -148,6 +151,8 @@ int EmuThreadFunc(void* burp)
}
else
{
EmuStatus = 2;
// paused
nframes = 0;
lasttick = SDL_GetTicks();
@ -160,6 +165,8 @@ int EmuThreadFunc(void* burp)
}
}
EmuStatus = 0;
if (audio) SDL_CloseAudioDevice(audio);
NDS::DeInit();
@ -269,6 +276,7 @@ void Run()
void Stop()
{
EmuRunning = 2;
while (EmuStatus != 2);
RunningSomething = false;
uiMenuItemDisable(MenuItem_Pause);
@ -291,13 +299,14 @@ void OnCloseByMenu(uiMenuItem* item, uiWindow* window, void* blarg)
{
// TODO????
// uiQuit() crashes
printf("TODO, eventually\n");
}
void OnOpenFile(uiMenuItem* item, uiWindow* window, void* blarg)
{
int prevstatus = EmuRunning;
EmuRunning = 2;
// TODO: ensure the emu thread has indeed stopped at this point
while (EmuStatus != 2);
char* file = uiOpenFile(window, "DS ROM (*.nds)|*.nds;*.srl|Any file|*.*", NULL);
if (!file)
@ -350,6 +359,9 @@ void OnReset(uiMenuItem* item, uiWindow* window, void* blarg)
{
if (!RunningSomething) return;
EmuRunning = 2;
while (EmuStatus != 2);
if (ROMPath[0] == '\0')
NDS::LoadBIOS();
else