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Added SDL_aligned_alloc_zero()

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This commit is contained in:
Sam Lantinga
2026-06-05 09:27:22 -07:00
parent fa2a726cc3
commit 55908f14f8
7 changed files with 53 additions and 9 deletions
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14
src/stdlib/SDL_stdlib.c
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@@ -523,7 +523,7 @@ int SDL_toupper(int x) { return ((x) >= 'a') && ((x) <= 'z') ? ('A' + ((x) - 'a'
int SDL_tolower(int x) { return ((x) >= 'A') && ((x) <= 'Z') ? ('a' + ((x) - 'A')) : (x); }
int SDL_isblank(int x) { return ((x) == ' ') || ((x) == '\t'); }
void *SDL_aligned_alloc(size_t alignment, size_t size)
static void *SDL_aligned_alloc_internal(size_t alignment, size_t size, bool clear_memory)
{
size_t padding;
Uint8 *result = NULL;
@@ -537,7 +537,7 @@ void *SDL_aligned_alloc(size_t alignment, size_t size)
if (SDL_size_add_check_overflow(size, alignment, &size) &&
SDL_size_add_check_overflow(size, sizeof(void *), &size) &&
SDL_size_add_check_overflow(size, padding, &size)) {
void *original = SDL_malloc(size);
void *original = clear_memory ? SDL_calloc(1, size) : SDL_malloc(size);
if (original) {
// Make sure we have enough space to store the original pointer
result = (Uint8 *)original + sizeof(original);
@@ -557,6 +557,16 @@ void *SDL_aligned_alloc(size_t alignment, size_t size)
return result;
}
void *SDL_aligned_alloc(size_t alignment, size_t size)
{
return SDL_aligned_alloc_internal(alignment, size, false);
}
void *SDL_aligned_alloc_zero(size_t alignment, size_t size)
{
return SDL_aligned_alloc_internal(alignment, size, true);
}
void SDL_aligned_free(void *mem)
{
if (mem) {