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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*-
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef CombinedStacks_h__
#define CombinedStacks_h__
#include <vector>
#include "ProcessedStack.h"
class JSObject;
struct JSContext;
namespace mozilla {
namespace Telemetry {
/**
* This class is conceptually a list of ProcessedStack objects, but it
* represents them more efficiently by keeping a single global list of modules.
*/
class CombinedStacks {
public:
explicit CombinedStacks();
explicit CombinedStacks(size_t aMaxStacksCount);
typedef std::vector<Telemetry::ProcessedStack::Frame> Stack;
const Telemetry::ProcessedStack::Module& GetModule(unsigned aIndex) const;
size_t GetModuleCount() const;
const Stack& GetStack(unsigned aIndex) const;
size_t AddStack(const Telemetry::ProcessedStack& aStack);
size_t GetStackCount() const;
size_t SizeOfExcludingThis() const;
#if defined(MOZ_GECKO_PROFILER)
/** Clears the contents of vectors and resets the index. */
void Clear();
#endif
private:
std::vector<Telemetry::ProcessedStack::Module> mModules;
// A circular buffer to hold the stacks.
std::vector<Stack> mStacks;
// The index of the next buffer element to write to in mStacks.
size_t mNextIndex;
// The maximum number of stacks to keep in the CombinedStacks object.
size_t mMaxStacksCount;
};
/**
* Creates a JSON representation of given combined stacks object.
*/
JSObject* CreateJSStackObject(JSContext* cx, const CombinedStacks& stacks);
} // namespace Telemetry
} // namespace mozilla
#endif // CombinedStacks_h__
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