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Added a single source of SDL object IDs

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This ensures that we don't accidentally interpret an ID from one system as an ID in another system.
Audio device IDs are not covered here, since they have a unique numbering system.
This commit is contained in:
Sam Lantinga
2023-10-23 09:46:09 -07:00
parent e07f6c0a17
commit 38afd48daf
23 changed files with 37 additions and 50 deletions
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14
src/SDL.c
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@@ -514,6 +514,20 @@ void SDL_Quit(void)
SDL_bInMainQuit = SDL_FALSE;
}
/* Assume we can wrap SDL_AtomicInt values and cast to Uint32 */
SDL_COMPILE_TIME_ASSERT(sizeof_object_id, sizeof(int) == sizeof(Uint32));
Uint32 SDL_GetNextObjectID(void)
{
static SDL_AtomicInt last_id;
Uint32 id = (Uint32)SDL_AtomicIncRef(&last_id) + 1;
if (id == 0) {
id = (Uint32)SDL_AtomicIncRef(&last_id) + 1;
}
return id;
}
/* Get the library version number */
int SDL_GetVersion(SDL_version *ver)
{