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Introduce formal policy for APIs that return strings.

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This declares that any `const char *` returned from SDL is owned by SDL, and
promises to be valid _at least_ until the next time the event queue runs, or
SDL_Quit() is called, even if the thing that owns the string gets destroyed
or changed before then.

This is noted in the headers as "the SDL_GetStringRule", so this will both be
greppable to find a detailed explaination in docs/README-strings.md and
wikiheaders will automatically turn it into a link we can point at the
appropriate documentation.

Fixes #9902.

(and several FIXMEs, both known and yet-undocumented.)
This commit is contained in:
Ryan C. Gordon 2024-06-01 22:05:21 -04:00
parent b1f3682216
commit e23257307e
51 changed files with 262 additions and 123 deletions
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3
test/testmultiaudio.c
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@ -57,7 +57,7 @@ test_multi_audio(SDL_AudioDeviceID *devices, int devcount)
#endif
for (i = 0; i < devcount; i++) {
char *devname = SDL_GetAudioDeviceName(devices[i]);
const char *devname = SDL_GetAudioDeviceName(devices[i]);
SDL_Log("Playing on device #%d of %d: id=%u, name='%s'...", i, devcount, (unsigned int) devices[i], devname);
@ -82,7 +82,6 @@ test_multi_audio(SDL_AudioDeviceID *devices, int devcount)
SDL_Log("done.");
SDL_DestroyAudioStream(stream);
}
SDL_free(devname);
stream = NULL;
}