/usr/include/sipxtapi/os/OsAtomics.h is in libsipxtapi-dev 3.3.0~test17-2.1.
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// Copyright (C) 2008 SIPez LLC.
// Licensed to SIPfoundry under a Contributor Agreement.
//
// Copyright (C) 2008 SIPfoundry Inc.
// Licensed by SIPfoundry under the LGPL license.
//
// $$
///////////////////////////////////////////////////////////////////////////////
// Author: Alexander Chemeris <Alexander DOT Chemeris AT SIPez DOT com>
#ifndef _OsAtomics_H_ // [
#define _OsAtomics_H_
#ifdef HAVE_C_ATOMICS // [
# include <cstdatomic>
typedef atomic_int OsAtomicInt;
typedef atomic_uint OsAtomicUInt;
typedef atomic_long OsAtomicLong;
typedef atomic_ulong OsAtomicULong;
typedef atomic_address OsAtomicVoidPtr;
#define OsAtomicLight OsAtomic
#elif defined(ANDROID) // HAVE_C_ATOMICS ][ ANDROID
#include <os/OsAtomicsAndroid.h>
#else // ANDROID ][
#ifdef __arm__
#warning ARM version of OsAtomics need to be fixed to support ARM features.
#endif
# include <os/OsLock.h>
# include <os/OsMutex.h>
# include <stddef.h>
# include <os/OsIntTypes.h>
typedef enum memory_order {
memory_order_relaxed, memory_order_consume, memory_order_acquire,
memory_order_release, memory_order_acq_rel, memory_order_seq_cst
} memory_order;
template<class T>
class OsAtomic
{
public:
bool is_lock_free() const
{return false;}
void store(T val, memory_order = memory_order_seq_cst)
{OsLock lock(mMutex); mVal = val;}
T load(memory_order = memory_order_seq_cst) const
{OsLock lock(mMutex); return mVal;}
operator T() const
{return load();}
// T exchange(T val, memory_order = memory_order_seq_cst);
// bool compare_exchange(T &, T , memory_order, memory_order);
// bool compare_exchange(T &, T , memory_order = memory_order_seq_cst);
void fence(memory_order) const
{};
T fetch_add(T val, memory_order = memory_order_seq_cst)
{OsLock lock(mMutex); T temp = mVal; mVal += val; return temp;}
T fetch_sub(T val, memory_order = memory_order_seq_cst)
{OsLock lock(mMutex); T temp = mVal; mVal -= val; return temp;}
T fetch_and(T val, memory_order = memory_order_seq_cst)
{OsLock lock(mMutex); T temp = mVal; mVal &= val; return temp;}
T fetch_or(T val, memory_order = memory_order_seq_cst)
{OsLock lock(mMutex); T temp = mVal; mVal |= val; return temp;}
T fetch_xor(T val, memory_order = memory_order_seq_cst)
{OsLock lock(mMutex); T temp = mVal; mVal ^= val; return temp;}
OsAtomic<T>() : mMutex(0) {};
explicit OsAtomic<T>(T val) : mVal(val), mMutex(0) {};
T operator=(T val)
{store(val); return val;}
T operator++(int)
{return fetch_add(1);}
T operator--(int)
{return fetch_sub(1);}
T operator++()
{return operator+=(1);}
T operator--()
{return operator-=(1);}
T operator+=(T val)
{OsLock lock(mMutex); mVal += val; return mVal;}
T operator-=(T val)
{OsLock lock(mMutex); mVal -= val; return mVal;}
T operator&=(T val)
{OsLock lock(mMutex); mVal &= val; return mVal;}
T operator|=(T val)
{OsLock lock(mMutex); mVal |= val; return mVal;}
T operator^=(T val)
{OsLock lock(mMutex); mVal ^= val; return mVal;}
private:
T mVal;
mutable OsMutex mMutex;
// Prohibit use of copy constructor and operator=
OsAtomic<T>(const OsAtomic<T>&);
OsAtomic<T>& operator=(const OsAtomic<T>&);
};
typedef OsAtomic<int> OsAtomicInt;
typedef OsAtomic<unsigned int> OsAtomicUInt;
typedef OsAtomic<long> OsAtomicLong;
typedef OsAtomic<unsigned long> OsAtomicULong;
class OsAtomicBool {
public:
bool is_lock_free() const
{return false;}
OsAtomicBool() : mMutex(0) {};
explicit OsAtomicBool(bool val) : mVal(val), mMutex(0) {};
void store(bool val, memory_order = memory_order_seq_cst)
{OsLock lock(mMutex); mVal = val;}
bool load(memory_order = memory_order_seq_cst) const
{OsLock lock(mMutex); return mVal;}
bool operator=(bool val)
{store(val); return val;}
operator bool() const
{return load();}
// bool exchange(bool, memory_order = memory_order_seq_cst);
// bool compare_exchange(bool&, bool, memory_order, memory_order);
// bool compare_exchange(bool&, bool, memory_order = memory_order_seq_cst);
void fence(memory_order) const
{}
private:
bool mVal;
mutable OsMutex mMutex;
// Prohibit use of copy constructor and operator=
OsAtomicBool(const OsAtomicBool&);
OsAtomicBool& operator=(const OsAtomicBool&);
};
class OsAtomicVoidPtr
{
public:
bool is_lock_free() const
{return false;}
void store(void* val, memory_order = memory_order_seq_cst)
{OsLock lock(mMutex); mVal = val;}
void* load(memory_order = memory_order_seq_cst) const
{OsLock lock(mMutex); return mVal;}
operator void*() const
{return load();}
// void* exchange(void* val, memory_order = memory_order_seq_cst);
// bool compare_exchange(void* &, void* , memory_order, memory_order);
// bool compare_exchange(void* &, void* , memory_order = memory_order_seq_cst);
void fence(memory_order) const
{};
void* fetch_add(ptrdiff_t val, memory_order = memory_order_seq_cst)
{OsLock lock(mMutex); void* temp = mVal; mVal = (int8_t*)mVal + val; return temp;}
void* fetch_sub(ptrdiff_t val, memory_order = memory_order_seq_cst)
{OsLock lock(mMutex); void* temp = mVal; mVal = (int8_t*)mVal - val; return temp;}
OsAtomicVoidPtr() : mMutex(0) {};
explicit OsAtomicVoidPtr(void* val) : mVal(val), mMutex(0) {};
void* operator=(void* val)
{store(val); return val;}
void* operator+=(ptrdiff_t val)
{OsLock lock(mMutex); mVal = (int8_t*)mVal + val; return mVal;}
void* operator-=(ptrdiff_t val)
{OsLock lock(mMutex); mVal = (int8_t*)mVal - val; return mVal;}
private:
void* mVal;
mutable OsMutex mMutex;
// Prohibit use of copy constructor and operator=
OsAtomicVoidPtr(const OsAtomicVoidPtr&);
OsAtomicVoidPtr& operator=(const OsAtomicVoidPtr&);
};
template<class T>
class OsAtomicPtr : public OsAtomicVoidPtr
{
public:
bool is_lock_free() const
{return false;}
void store(T* val, memory_order mo = memory_order_seq_cst)
{OsAtomicVoidPtr::store((void*)val, mo);}
T* load(memory_order mo = memory_order_seq_cst) const
{return (T*)OsAtomicVoidPtr::load(mo);}
operator T*() const
{return (T*)OsAtomicVoidPtr::operator void*();}
// T* exchange(T* val, memory_order mo = memory_order_seq_cst);
// bool compare_exchange(T* &, T* , memory_order mo, memory_order mo);
// bool compare_exchange(T* &, T* , memory_order mo = memory_order_seq_cst);
void fence(memory_order mo) const
{OsAtomicVoidPtr::fence(mo);}
T* fetch_add(ptrdiff_t val, memory_order mo = memory_order_seq_cst)
{return (T*)OsAtomicVoidPtr::fetch_add(val, mo);}
T* fetch_sub(ptrdiff_t val, memory_order mo = memory_order_seq_cst)
{return (T*)OsAtomicVoidPtr::fetch_sub(val, mo);}
OsAtomicPtr() {};
explicit OsAtomicPtr(T* val) : OsAtomicVoidPtr((void*)val) {};
T* operator=(T* val)
{return (T*)OsAtomicVoidPtr::operator=((void*)val);}
T* operator+=(ptrdiff_t val)
{return (T*)OsAtomicVoidPtr::operator+=(val);}
T* operator-=(ptrdiff_t val)
{return (T*)OsAtomicVoidPtr::operator-=(val);}
private:
// Prohibit use of copy constructor and operator=
OsAtomicPtr(const OsAtomicPtr&);
OsAtomicPtr& operator=(const OsAtomicPtr&);
};
#if defined(_M_IX86) || defined(_M_X64) || defined(__i386__) || defined(__amd64__) || defined (__arm__)// [
template<class T>
class OsAtomicLight
{
public:
bool is_lock_free() const
{return true;}
void store(T val, memory_order = memory_order_relaxed)
{mVal = val;}
T load(memory_order = memory_order_relaxed) const
{return mVal;}
operator T() const
{return load();}
void fence(memory_order) const
{};
OsAtomicLight<T>() {};
explicit OsAtomicLight<T>(T val) : mVal(val) {};
T operator=(T val)
{store(val); return val;}
private:
volatile T mVal;
// Prohibit use of copy constructor and operator=
OsAtomicLight<T>(const OsAtomicLight<T>&);
OsAtomicLight<T>& operator=(const OsAtomicLight<T>&);
};
template<class T>
class OsAtomicLightPtr
{
public:
bool is_lock_free() const
{return true;}
void store(T* val, memory_order mo = memory_order_relaxed)
{mVal = val;}
const T* load(memory_order mo = memory_order_relaxed) const
{return mVal;}
T* load(memory_order mo = memory_order_relaxed)
{return mVal;}
operator const T*() const
{return load();}
operator T*()
{return load();}
void fence(memory_order mo) const
{}
OsAtomicLightPtr() {};
explicit OsAtomicLightPtr(T* val) : mVal(val) {};
T* operator=(T* val)
{store(val); return val;}
private:
T * volatile mVal;
// Prohibit use of copy constructor and operator=
OsAtomicLightPtr(const OsAtomicLightPtr&);
OsAtomicLightPtr& operator=(const OsAtomicLightPtr&);
};
#else // X86/X86_64/ARM ][
#define OsAtomicLight OsAtomic
#define OsAtomicLightPtr OsAtomicPtr
#endif // !X86/X86_64/ARM
#endif // HAVE_C_ATOMICS ]
typedef OsAtomicLight<int> OsAtomicLightInt;
typedef OsAtomicLight<unsigned int> OsAtomicLightUInt;
typedef OsAtomicLight<long> OsAtomicLightLong;
typedef OsAtomicLight<unsigned long> OsAtomicLightULong;
typedef OsAtomicLight<bool> OsAtomicLightBool;
#endif // _OsAtomics_H_ ]
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