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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 MOZ_PROFILE_BUFFER_H
#define MOZ_PROFILE_BUFFER_H
#include "ProfileEntry.h"
#include "platform.h"
#include "ProfileJSONWriter.h"
#include "mozilla/RefPtr.h"
#include "mozilla/RefCounted.h"
class ProfileBuffer : public mozilla::RefCounted<ProfileBuffer> {
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(ProfileBuffer)
explicit ProfileBuffer(int aEntrySize);
virtual ~ProfileBuffer();
void addTag(const ProfileEntry& aTag);
void StreamSamplesToJSON(SpliceableJSONWriter& aWriter, int aThreadId, double aSinceTime,
JSContext* cx, UniqueStacks& aUniqueStacks);
void StreamMarkersToJSON(SpliceableJSONWriter& aWriter, int aThreadId, double aSinceTime,
UniqueStacks& aUniqueStacks);
void DuplicateLastSample(int aThreadId);
void addStoredMarker(ProfilerMarker* aStoredMarker);
// The following two methods are not signal safe! They delete markers.
void deleteExpiredStoredMarkers();
void reset();
protected:
char* processDynamicTag(int readPos, int* tagsConsumed, char* tagBuff);
int FindLastSampleOfThread(int aThreadId);
public:
// Circular buffer 'Keep One Slot Open' implementation for simplicity
mozilla::UniquePtr<ProfileEntry[]> mEntries;
// Points to the next entry we will write to, which is also the one at which
// we need to stop reading.
int mWritePos;
// Points to the entry at which we can start reading.
int mReadPos;
// The number of entries in our buffer.
int mEntrySize;
// How many times mWritePos has wrapped around.
uint32_t mGeneration;
// Markers that marker entries in the buffer might refer to.
ProfilerMarkerLinkedList mStoredMarkers;
};
#endif
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