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SDL_ResetHint() no longer clears the callbacks associated with a hint

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Also added SDL_ResetHints() to reset all callbacks, and clarified that SDL_ClearHints() is just used for cleanup at shutdown.

Fixes https://github.com/libsdl-org/SDL/issues/6313
This commit is contained in:
Sam Lantinga
2022-10-02 17:17:31 -07:00
parent 19ecb64e0d
commit 64ea6cefaf
6 changed files with 99 additions and 9 deletions
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35
src/SDL_hints.c
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@@ -100,7 +100,6 @@ SDL_bool
SDL_ResetHint(const char *name)
{
const char *env;
SDL_Hint *hint, *prev;
SDL_HintWatch *entry;
if (!name) {
@@ -108,7 +107,7 @@ SDL_ResetHint(const char *name)
}
env = SDL_getenv(name);
for (prev = NULL, hint = SDL_hints; hint; prev = hint, hint = hint->next) {
for (hint = SDL_hints; hint; hint = hint->next) {
if (SDL_strcmp(name, hint->name) == 0) {
if ((env == NULL && hint->value != NULL) ||
(env != NULL && hint->value == NULL) ||
@@ -120,19 +119,39 @@ SDL_ResetHint(const char *name)
entry = next;
}
}
if (prev) {
prev->next = hint->next;
} else {
SDL_hints = hint->next;
}
SDL_free(hint->value);
SDL_free(hint);
hint->value = NULL;
hint->priority = SDL_HINT_DEFAULT;
return SDL_TRUE;
}
}
return SDL_FALSE;
}
void
SDL_ResetHints(void)
{
const char *env;
SDL_HintWatch *entry;
for (hint = SDL_hints; hint; hint = hint->next) {
env = SDL_getenv(hint->name);
if ((env == NULL && hint->value != NULL) ||
(env != NULL && hint->value == NULL) ||
(env && SDL_strcmp(env, hint->value) != 0)) {
for (entry = hint->callbacks; entry; ) {
/* Save the next entry in case this one is deleted */
SDL_HintWatch *next = entry->next;
entry->callback(entry->userdata, name, hint->value, env);
entry = next;
}
}
SDL_free(hint->value);
hint->value = NULL;
hint->priority = SDL_HINT_DEFAULT;
}
}
SDL_bool
SDL_SetHint(const char *name, const char *value)
{