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Fixed potential hang in joystick close if the rumble thread is blocked for some reason

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It's still possible to hang when shutting down, if the rumble thread is still hung, but it won't block indefinitely at runtime.
This commit is contained in:
Sam Lantinga
2020-12-07 09:38:21 -08:00
parent 3c68051eaf
commit c9723c407f
2 changed files with 29 additions and 10 deletions
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22
src/joystick/hidapi/SDL_hidapijoystick.c
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@@ -833,6 +833,11 @@ HIDAPI_DelDevice(SDL_HIDAPI_Device *device)
HIDAPI_CleanupDeviceDriver(device);
/* Make sure the rumble thread is done with this device */
while (SDL_AtomicGet(&device->rumble_pending) > 0) {
SDL_Delay(10);
}
SDL_DestroyMutex(device->dev_lock);
SDL_free(device->serial);
SDL_free(device->name);
@@ -1193,10 +1198,13 @@ HIDAPI_JoystickClose(SDL_Joystick * joystick)
{
if (joystick->hwdata) {
SDL_HIDAPI_Device *device = joystick->hwdata->device;
int i;
/* Wait for pending rumble to complete */
while (SDL_AtomicGet(&device->rumble_pending) > 0) {
SDL_Delay(10);
/* Wait up to 30 ms for pending rumble to complete */
for (i = 0; i < 3; ++i) {
while (SDL_AtomicGet(&device->rumble_pending) > 0) {
SDL_Delay(10);
}
}
device->driver->CloseJoystick(device, joystick);
@@ -1215,11 +1223,14 @@ HIDAPI_JoystickQuit(void)
HIDAPI_ShutdownDiscovery();
SDL_HIDAPI_QuitRumble();
while (SDL_HIDAPI_devices) {
HIDAPI_DelDevice(SDL_HIDAPI_devices);
}
SDL_HIDAPI_QuitRumble();
/* Make sure the drivers cleaned up properly */
SDL_assert(SDL_HIDAPI_numjoysticks == 0);
for (i = 0; i < SDL_arraysize(SDL_HIDAPI_drivers); ++i) {
SDL_HIDAPI_DeviceDriver *driver = SDL_HIDAPI_drivers[i];
@@ -1230,9 +1241,6 @@ HIDAPI_JoystickQuit(void)
hid_exit();
/* Make sure the drivers cleaned up properly */
SDL_assert(SDL_HIDAPI_numjoysticks == 0);
shutting_down = SDL_FALSE;
initialized = SDL_FALSE;
}