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Cache the fact that a device didn't look like a joystick 

Fixes https://github.com/libsdl-org/SDL/issues/5211
This commit is contained in:
Sam Lantinga 2022-04-05 19:43:42 -07:00
parent 138d96c8a6
commit eb660e862c
1 changed files with 10 additions and 3 deletions
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13
src/joystick/linux/SDL_sysjoystick.c
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@ -109,6 +109,7 @@ typedef struct SDL_joylist_item
/* Steam Controller support */
SDL_bool m_bSteamController;
SDL_bool checked_mapping;
SDL_GamepadMapping *mapping;
} SDL_joylist_item;
@ -1573,9 +1574,13 @@ LINUX_JoystickGetGamepadMapping(int device_index, SDL_GamepadMapping *out)
SDL_Joystick *joystick;
SDL_joylist_item *item = JoystickByDevIndex(device_index);
if (item->mapping) {
SDL_memcpy(out, item->mapping, sizeof(*out));
return SDL_TRUE;
if (item->checked_mapping) {
if (item->mapping) {
SDL_memcpy(out, item->mapping, sizeof(*out));
return SDL_TRUE;
} else {
return SDL_FALSE;
}
}
/* We temporarily open the device to check how it's configured. Make
@ -1595,6 +1600,8 @@ LINUX_JoystickGetGamepadMapping(int device_index, SDL_GamepadMapping *out)
return SDL_FALSE;
}
item->checked_mapping = SDL_TRUE;
if (PrepareJoystickHwdata(joystick, item) == -1) {
SDL_free(joystick->hwdata);
SDL_free(joystick);