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// 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/command_buffer/common/gpu_command_buffer_common_export.h"
// From glextchromium.h.
#ifndef GL_SYNC_TOKEN_SIZE_CHROMIUM
#define GL_SYNC_TOKEN_SIZE_CHROMIUM 24
#endif
namespace gpu {
struct GPU_COMMAND_BUFFER_COMMON_EXPORT SyncPointClientId {
SyncPointClientId() = default;
SyncPointClientId(CommandBufferNamespace in_namespace_id,
CommandBufferId in_command_buffer_id);
bool operator<(const SyncPointClientId& other) const {
return std::tie(namespace_id, command_buffer_id) <
std::tie(other.namespace_id, other.command_buffer_id);
}
CommandBufferNamespace namespace_id = CommandBufferNamespace::INVALID;
CommandBufferId command_buffer_id;
};
// 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_COMMAND_BUFFER_COMMON_EXPORT SyncToken {
SyncToken();
SyncToken(CommandBufferNamespace namespace_id,
CommandBufferId command_buffer_id,
uint64_t release_count);
SyncToken(const SyncToken& other);
SyncToken& operator=(const SyncToken& other);
void Set(CommandBufferNamespace namespace_id,
CommandBufferId command_buffer_id,
uint64_t release_count) {
namespace_id_ = namespace_id;
command_buffer_id_ = command_buffer_id;
release_count_ = release_count;
}
void Clear() {
verified_flush_ = false;
namespace_id_ = CommandBufferNamespace::INVALID;
command_buffer_id_ = CommandBufferId();
release_count_ = 0;
}
void SetVerifyFlush() {
verified_flush_ = true;
}
bool HasData() const {
return namespace_id_ != CommandBufferNamespace::INVALID;
}
int8_t* GetData() { return reinterpret_cast<int8_t*>(this); }
const int8_t* GetConstData() const {
return reinterpret_cast<const int8_t*>(this);
}
bool verified_flush() const { return verified_flush_; }
CommandBufferNamespace namespace_id() const { return namespace_id_; }
CommandBufferId command_buffer_id() const { return command_buffer_id_; }
uint64_t release_count() const { return release_count_; }
friend bool operator==(const SyncToken&, const SyncToken&) = default;
friend std::strong_ordering operator<=>(const SyncToken&,
const SyncToken&) = default;
std::string ToDebugString() const;
SyncPointClientId GetClientId() const {
return SyncPointClientId(namespace_id_, command_buffer_id_);
}
private:
bool verified_flush_;
CommandBufferNamespace namespace_id_;
CommandBufferId command_buffer_id_;
uint64_t release_count_;
};
static_assert(sizeof(SyncToken) <= GL_SYNC_TOKEN_SIZE_CHROMIUM,
"SyncToken size must not exceed GL_SYNC_TOKEN_SIZE_CHROMIUM");
// 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_COMMAND_BUFFER_COMMON_EXPORT std::vector<SyncToken> ReduceSyncTokens(
base::span<const SyncToken> tokens);
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_COMMON_SYNC_TOKEN_H_
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