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Added thread-safe environment functions

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Also marked the existing functions as unsafe, as they can cause crashes if used in multi-threaded applications.

As a bonus, since the new functions are hashtable based, hint environment lookups are much faster.
This commit is contained in:
Sam Lantinga
2024-09-13 17:00:15 -07:00
parent 16ff7503b7
commit 90e01040c5
49 changed files with 696 additions and 252 deletions
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8
src/SDL_hints.c
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@@ -72,7 +72,7 @@ SDL_bool SDL_SetHintWithPriority(const char *name, const char *value, SDL_HintPr
return SDL_InvalidParamError("name");
}
const char *env = SDL_getenv(name);
const char *env = SDL_GetEnvironmentVariable(SDL_GetEnvironment(), name);
if (env && (priority < SDL_HINT_OVERRIDE)) {
return SDL_SetError("An environment variable is taking priority");
}
@@ -126,7 +126,7 @@ SDL_bool SDL_ResetHint(const char *name)
return SDL_InvalidParamError("name");
}
const char *env = SDL_getenv(name);
const char *env = SDL_GetEnvironmentVariable(SDL_GetEnvironment(), name);
const SDL_PropertiesID hints = GetHintProperties(false);
if (!hints) {
@@ -165,7 +165,7 @@ static void SDLCALL ResetHintsCallback(void *userdata, SDL_PropertiesID hints, c
return; // uh...okay.
}
const char *env = SDL_getenv(name);
const char *env = SDL_GetEnvironmentVariable(SDL_GetEnvironment(), name);
if ((!env && hint->value) || (env && !hint->value) || (env && SDL_strcmp(env, hint->value) != 0)) {
SDL_HintWatch *entry = hint->callbacks;
while (entry) {
@@ -196,7 +196,7 @@ const char *SDL_GetHint(const char *name)
return NULL;
}
const char *result = SDL_getenv(name);
const char *result = SDL_GetEnvironmentVariable(SDL_GetEnvironment(), name);
const SDL_PropertiesID hints = GetHintProperties(false);
if (hints) {