#version 450
// D4R_SHIM_GPU_COMPLETION: holds the game's queue until DLSS has written this frame's completion word (HIP
// hipStreamWriteValue32 after the output, or the CPU on every failure path). Bounded: after `limit` polls the
// shader returns regardless, so a lost write can never hang the GPU (the frame then shows its previous output).
layout(local_size_x = 1) in;
layout(std430, set = 0, binding = 0) coherent volatile readonly buffer Words { uint words[]; };
layout(push_constant) uniform Wait { uint index; uint value; uint limit; } wait;
void main() {
    for (uint poll = 0u; poll < wait.limit; ++poll)
        if (words[wait.index] == wait.value)
            return;
}