Function GlSyncWait

tensorflow/lite/delegates/gpu/gl/gl_sync.cc:28–47

namespace gl {

Status GlSyncWait() {
  GlSync sync;
  RETURN_IF_ERROR(GlSync::NewSync(&sync));
  // Flush sync and loop afterwards without it.
  GLenum status = glClientWaitSync(sync.sync(), GL_SYNC_FLUSH_COMMANDS_BIT,
                                   /* timeout ns = */ 0);
  while (true) {
    switch (status) {
      case GL_TIMEOUT_EXPIRED:
        break;
      case GL_CONDITION_SATISFIED:
      case GL_ALREADY_SIGNALED:
        return OkStatus();
      case GL_WAIT_FAILED:
        return GetOpenGlErrors();
    }
    status = glClientWaitSync(sync.sync(), 0, /* timeout ns = */ 10000000);
  }
  return OkStatus();
}

Status GlActiveSyncWait() {
  GlSync sync;