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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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4
src/dynapi/SDL_dynapi.c
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@ -351,7 +351,7 @@ static Sint32 initialize_jumptable(Uint32 apiver, void *table, Uint32 tablesize)
// Init our jump table first.
#if ENABLE_SDL_CALL_LOGGING
{
const char *env = SDL_getenv_REAL("SDL_DYNAPI_LOG_CALLS");
const char *env = SDL_getenv_unsafe_REAL("SDL_DYNAPI_LOG_CALLS");
const SDL_bool log_calls = (env && SDL_atoi_REAL(env));
if (log_calls) {
#define SDL_DYNAPI_PROC(rc, fn, params, args, ret) jump_table.fn = fn##_LOGSDLCALLS;
@ -461,7 +461,7 @@ extern SDL_NORETURN void SDL_ExitProcess(int exitcode);
static void SDL_InitDynamicAPILocked(void)
{
const char *libname = SDL_getenv_REAL(SDL_DYNAMIC_API_ENVVAR);
const char *libname = SDL_getenv_unsafe_REAL(SDL_DYNAMIC_API_ENVVAR);
SDL_DYNAPI_ENTRYFN entry = NULL; // funcs from here by default.
SDL_bool use_internal = SDL_TRUE;