blob: 6a6bfad2a9a8ba2ef8ebcfdea5ba3cf26151ab2c [file] [log] [blame]
// Copyright 2015 The Chromium Authors. All rights reserved.
// 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 <string.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 24
#endif
namespace gpu {
// 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 {
SyncToken();
SyncToken(CommandBufferNamespace namespace_id,
int32_t extra_data_field,
CommandBufferId command_buffer_id,
uint64_t release_count);
SyncToken(const SyncToken& other);
void Set(CommandBufferNamespace namespace_id,
int32_t extra_data_field,
CommandBufferId command_buffer_id,
uint64_t release_count) {
namespace_id_ = namespace_id;
extra_data_field_ = extra_data_field;
command_buffer_id_ = command_buffer_id;
release_count_ = release_count;
}
void Clear() {
verified_flush_ = false;
namespace_id_ = CommandBufferNamespace::INVALID;
extra_data_field_ = 0;
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_; }
// This extra data field can be used by command buffers to add extra
// information to identify unverified sync tokens. The current purpose
// of this field is only for unverified sync tokens which only exist within
// the same process so this information will not survive cross-process IPCs.
int32_t extra_data_field() const { return extra_data_field_; }
bool operator<(const SyncToken& other) const {
// TODO(dyen): Once all our compilers support c++11, we can replace this
// long list of comparisons with std::tie().
return (namespace_id_ < other.namespace_id()) ||
((namespace_id_ == other.namespace_id()) &&
((command_buffer_id_ < other.command_buffer_id()) ||
((command_buffer_id_ == other.command_buffer_id()) &&
(release_count_ < other.release_count()))));
}
bool operator==(const SyncToken& other) const {
return verified_flush_ == other.verified_flush() &&
namespace_id_ == other.namespace_id() &&
extra_data_field_ == other.extra_data_field() &&
command_buffer_id_ == other.command_buffer_id() &&
release_count_ == other.release_count();
}
bool operator!=(const SyncToken& other) const { return !(*this == other); }
private:
bool verified_flush_;
CommandBufferNamespace namespace_id_;
int32_t extra_data_field_;
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");
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_COMMON_SYNC_TOKEN_H_