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// Copyright 2014 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.
#include "cc/surfaces/surface_id_allocator.h"
#include <stdint.h>
#include "cc/surfaces/surface_manager.h"
namespace cc {
SurfaceIdAllocator::SurfaceIdAllocator(uint32_t id_namespace)
: id_namespace_(id_namespace), next_id_(1u), manager_(nullptr) {
}
void SurfaceIdAllocator::RegisterSurfaceIdNamespace(SurfaceManager* manager) {
DCHECK(!manager_);
manager_ = manager;
manager_->RegisterSurfaceIdNamespace(id_namespace_);
}
SurfaceIdAllocator::~SurfaceIdAllocator() {
if (manager_)
manager_->InvalidateSurfaceIdNamespace(id_namespace_);
}
SurfaceId SurfaceIdAllocator::GenerateId() {
SurfaceId id(static_cast<uint64_t>(id_namespace_) << 32 | next_id_);
next_id_++;
return id;
}
// static
uint32_t SurfaceIdAllocator::NamespaceForId(SurfaceId id) {
return id.id >> 32;
}
} // namespace cc
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