#pragma once

#ifndef TATOMICVAR_H

#define TATOMICVAR_H

#undef DVAPI

#undef DVVAR

#ifdef TNZCORE_EXPORTS

#define DVAPI DV_EXPORT_API

#define DVVAR DV_EXPORT_VAR

#else

#define DVAPI DV_IMPORT_API

#define DVVAR DV_IMPORT_VAR

#endif

#ifdef _WIN32

#include <windows.h></windows.h>

#elif defined(__sgi)

#include <sys atomic_ops.h=""></sys>

#elif defined(LINUX)

// #include <asm atomic.h=""></asm>

// it's broken, either include the kernel header

//   /usr/src/linux/include/asm/atomic.h

// or copy it here

#include "/usr/src/linux-2.4/include/asm/atomic.h"

#elif defined(powerpc)

// from linux-2.4.20-20.9/include/linux/asm-ppc

typedef struct { volatile int counter; } atomic_t;

#define ATOMIC_INIT(i)                                                         \

  { (i) }

#define atomic_read(v) ((v)->counter)

#define atomic_set(v, i) (((v)->counter) = (i))

extern void atomic_clear_mask(unsigned long mask, unsigned long *addr);

extern void atomic_set_mask(unsigned long mask, unsigned long *addr);

// we define it as we want to run on SMP dual processors...

#define CONFIG_SMP

#ifdef CONFIG_SMP

#define SMP_ISYNC "\n\tisync"

#else

#define SMP_ISYNC

#endif

static __inline__ void atomic_add(int a, atomic_t *v) {

  int t;

  __asm__ __volatile__(

      "1:	lwarx	%0,0,%3		\n\

	add	%0,%2,%0\n\

	stwcx.	%0,0,%3\n\

	bne-	1b"

      : "=&r"(t), "=m"(v->counter)

      : "r"(a), "r"(&v->counter), "m"(v->counter)

      : "cc");

}

static __inline__ int atomic_add_return(int a, atomic_t *v) {

  int t;

  __asm__ __volatile__(

      "1:	lwarx	%0,0,%2		\n\

	add	%0,%1,%0\n\

	stwcx.	%0,0,%2\n\

	bne-	1b" SMP_ISYNC

      : "=&r"(t)

      : "r"(a), "r"(&v->counter)

      : "cc", "memory");

  return t;

}

static __inline__ void atomic_sub(int a, atomic_t *v) {

  int t;

  __asm__ __volatile__(

      "1:	lwarx	%0,0,%3		\n\

	subf	%0,%2,%0\n\

	stwcx.	%0,0,%3\n\

	bne-	1b"

      : "=&r"(t), "=m"(v->counter)

      : "r"(a), "r"(&v->counter), "m"(v->counter)

      : "cc");

}

static __inline__ int atomic_sub_return(int a, atomic_t *v) {

  int t;

  __asm__ __volatile__(

      "1:	lwarx	%0,0,%2		\n\

	subf	%0,%1,%0\n\

	stwcx.	%0,0,%2\n\

	bne-	1b" SMP_ISYNC

      : "=&r"(t)

      : "r"(a), "r"(&v->counter)

      : "cc", "memory");

  return t;

}

static __inline__ void atomic_inc(atomic_t *v) {

  int t;

  __asm__ __volatile__(

      "1:	lwarx	%0,0,%2		\n\

	addic	%0,%0,1\n\

	stwcx.	%0,0,%2\n\

	bne-	1b"

      : "=&r"(t), "=m"(v->counter)

      : "r"(&v->counter), "m"(v->counter)

      : "cc");

}

static __inline__ int atomic_inc_return(atomic_t *v) {

  int t;

  __asm__ __volatile__(

      "1:	lwarx	%0,0,%1		\n\

	addic	%0,%0,1\n\

	stwcx.	%0,0,%1\n\

	bne-	1b" SMP_ISYNC

      : "=&r"(t)

      : "r"(&v->counter)

      : "cc", "memory");

  return t;

}

static __inline__ void atomic_dec(atomic_t *v) {

  int t;

  __asm__ __volatile__(

      "1:	lwarx	%0,0,%2		\n\

	addic	%0,%0,-1\n\

	stwcx.	%0,0,%2\n\

	bne-	1b"

      : "=&r"(t), "=m"(v->counter)

      : "r"(&v->counter), "m"(v->counter)

      : "cc");

}

static __inline__ int atomic_dec_return(atomic_t *v) {

  int t;

  __asm__ __volatile__(

      "1:	lwarx	%0,0,%1		\n\

	addic	%0,%0,-1\n\

	stwcx.	%0,0,%1\n\

	bne-	1b" SMP_ISYNC

      : "=&r"(t)

      : "r"(&v->counter)

      : "cc", "memory");

  return t;

}

#elif defined(i386)

#include <atomic></atomic>

typedef std::atomic<int> atomic_t;</int>

static __inline__ void atomic_set(atomic_t *v, const int value) {

  v->store(value);

}

static __inline__ int atomic_inc_return(atomic_t *v) {

  return v->fetch_add(1) + 1;  // post increment atomic

}

static __inline__ int atomic_dec_return(atomic_t *v) {

  return v->fetch_sub(1) - 1;  // post decriment atomic

}

static __inline__ int atomic_read(const atomic_t *v) { return v->load(); }

static __inline__ int atomic_add(int num, const atomic_t *v) {

  return const_cast<atomic_t *="">(v)->fetch_add(num) +</atomic_t>

         num; /* なんで const つけた? */

}

#else

@ @PLATFORM NOT SUPPORTED !@ @

#endif

/*! Platform specific

    Provides class with increment & decrement absolutely done in interlocked way

*/

class DVAPI TAtomicVar {

public:

#if defined(LINUX) || defined(MACOSX)

  TAtomicVar() { atomic_set(&m_var, 0); }

#else

  TAtomicVar() : m_var(0) {}

#endif

  long operator++() {

#ifdef _WIN32

    return InterlockedIncrement(&m_var);

#elif defined(__sgi)

    return ++m_var;

#elif defined(LINUX)

    // atomic_inc(&m_var);

    // return atomic_read(&m_var);

    //  this is broken as it can return a value != from ++m_var

    atomic_inc(&m_var);

    return atomic_read(&m_var);

#elif defined(MACOSX)

    return atomic_inc_return(&m_var);

#endif

  }

  long operator+=(long value) {

#ifdef _WIN32

    InterlockedExchangeAdd(&m_var, value);

    return m_var;

#elif defined(__sgi)

    m_var += value;

    return m_var;

#elif defined(LINUX)

    // atomic_inc(&m_var);

    // return atomic_read(&m_var);

    //  this is broken as it can return a value != from ++m_var

    assert(false);

    return m_var;

#elif defined(MACOSX)

    atomic_add(value, &m_var);

    return atomic_read(&m_var);

#endif

  }

  long operator--() {

#ifdef _WIN32

    return InterlockedDecrement(&m_var);

#elif defined(__sgi)

    return --m_var;

#elif defined(LINUX)

    // atomic_dec(&m_var);

    // return atomic_read(&m_var);

    // broken as above...

    atomic_dec(&m_var);

    return atomic_read(&m_var);

#elif defined(MACOSX)

    // atomic_dec(&m_var);

    // return atomic_read(&m_var);

    // broken as above...

    return atomic_dec_return(&m_var);

#endif

  }

  bool operator<=(const long &rhs) {

#if defined(LINUX) || defined(MACOSX)

    return atomic_read(&m_var) <= rhs;

#else

    return m_var <= rhs;

#endif

  };

  operator long() const {

#if defined(LINUX) || defined(MACOSX)

    return atomic_read(&m_var);

#else

    return m_var;

#endif

  };

#ifdef _WIN32

  long m_var;

#elif defined(__sgi)

  long m_var;

#elif defined(LINUX) || defined(MACOSX)

  atomic_t m_var;

#endif

#if !defined(LINUX) || defined(LINUX) && (__GNUC__ == 3) && (__GNUC_MINOR__ > 1)

private:  // to avoid well known bug in gcc3 ... fixed in later versions..

#endif

  TAtomicVar &operator=(const TAtomicVar &);  // not implemented

  TAtomicVar(const TAtomicVar &v);            // not implemented

};

#endif