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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 ThreadInfo_h
#define ThreadInfo_h
#include "mozilla/Atomics.h"
#include "mozilla/TimeStamp.h"
namespace mozilla {
namespace baseprofiler {
// This class contains information about a thread which needs to be stored
// across restarts of the profiler and which can be useful even after the
// thread has stopped running.
// It uses threadsafe refcounting and only contains immutable data.
class ThreadInfo final {
public:
ThreadInfo(const char* aName, int aThreadId, bool aIsMainThread,
const TimeStamp& aRegisterTime = TimeStamp::NowUnfuzzed())
: mName(aName),
mRegisterTime(aRegisterTime),
mThreadId(aThreadId),
mIsMainThread(aIsMainThread),
mRefCnt(0) {
// I don't know if we can assert this. But we should warn.
MOZ_ASSERT(aThreadId >= 0, "native thread ID is < 0");
MOZ_ASSERT(aThreadId <= INT32_MAX, "native thread ID is > INT32_MAX");
}
// Using hand-rolled ref-counting, because RefCounted.h macros don't produce
// the same code between mozglue and libxul, see bug 1536656.
MFBT_API void AddRef() const { ++mRefCnt; }
MFBT_API void Release() const {
MOZ_ASSERT(int32_t(mRefCnt) > 0);
if (--mRefCnt == 0) {
delete this;
}
}
const char* Name() const { return mName.c_str(); }
TimeStamp RegisterTime() const { return mRegisterTime; }
int ThreadId() const { return mThreadId; }
bool IsMainThread() const { return mIsMainThread; }
private:
const std::string mName;
const TimeStamp mRegisterTime;
const int mThreadId;
const bool mIsMainThread;
mutable Atomic<int32_t, MemoryOrdering::ReleaseAcquire> mRefCnt;
};
} // namespace baseprofiler
} // namespace mozilla
#endif // ThreadInfo_h
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