chromium/gpu/command_buffer/common/sync_token.h

// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef GPU_COMMAND_BUFFER_COMMON_SYNC_TOKEN_H_
#define GPU_COMMAND_BUFFER_COMMON_SYNC_TOKEN_H_

#include <stdint.h>

#include <compare>
#include <string>
#include <vector>

#include "base/containers/span.h"
#include "gpu/command_buffer/common/command_buffer_id.h"
#include "gpu/command_buffer/common/constants.h"
#include "gpu/gpu_export.h"

// From glextchromium.h.
#ifndef GL_SYNC_TOKEN_SIZE_CHROMIUM
#define GL_SYNC_TOKEN_SIZE_CHROMIUM …
#endif

namespace gpu {

struct GPU_EXPORT SyncPointClientId { … };

// A Sync Token is a binary blob which represents a waitable fence sync
// on a particular command buffer namespace and id.
// See src/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_sync_point.txt for more
// details.
struct GPU_EXPORT SyncToken { … };

static_assert …;

// Remove redundant tokens such that it should be equivalent to wait on all
// tokens in the output instead of waiting on all input `tokens`.
GPU_EXPORT std::vector<SyncToken> ReduceSyncTokens(
    base::span<const SyncToken> tokens);

}  // namespace gpu

#endif  // GPU_COMMAND_BUFFER_COMMON_SYNC_TOKEN_H_