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metal: Added missing lock in METAL_INTERNAL_PerformPendingDestroys.

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Without this lock, a concurrent call to SDL_ReleaseGPUBuffer, SDL_ReleaseGPUTransferBuffer or SDL_ReleaseGPUTexture can cause one of the arrays to be reallocated while METAL_INTERNAL_PerformPendingDestroys is iterating over it, causing a bad day all around.

(cherry picked from commit 1492911c7d)
This commit is contained in:
Jakub Wasilewski 2026-04-29 10:26:35 +02:00 • committed by Sam Lantinga
parent 46f87cdc5a
commit cc150bc566
1 changed files with 4 additions and 0 deletions
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4
src/gpu/metal/SDL_gpu_metal.m
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@ -3545,6 +3545,8 @@ static void METAL_INTERNAL_PerformPendingDestroys(
Sint32 i;
Uint32 j;
SDL_LockMutex(renderer->disposeLock);
for (i = renderer->bufferContainersToDestroyCount - 1; i >= 0; i -= 1) {
referenceCount = 0;
for (j = 0; j < renderer->bufferContainersToDestroy[i]->bufferCount; j += 1) {
@ -3574,6 +3576,8 @@ static void METAL_INTERNAL_PerformPendingDestroys(
renderer->textureContainersToDestroyCount -= 1;
}
}
SDL_UnlockMutex(renderer->disposeLock);
}
// Fences