linux_itanium.h

英特尔&#174 线程构建模块（英特尔&#174 TBB）是一个屡获殊荣的 C++ 运行时库

/*
    Copyright 2005-2007 Intel Corporation.  All Rights Reserved.

    This file is part of Threading Building Blocks.

    Threading Building Blocks is free software; you can redistribute it
    and/or modify it under the terms of the GNU General Public License
    version 2 as published by the Free Software Foundation.

    Threading Building Blocks is distributed in the hope that it will be
    useful, but WITHOUT ANY WARRANTY; without even the implied warranty
    of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Threading Building Blocks; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    As a special exception, you may use this file as part of a free software
    library without restriction.  Specifically, if other files instantiate
    templates or use macros or inline functions from this file, or you compile
    this file and link it with other files to produce an executable, this
    file does not by itself cause the resulting executable to be covered by
    the GNU General Public License.  This exception does not however
    invalidate any other reasons why the executable file might be covered by
    the GNU General Public License.
*/

#ifndef __TBB_machine_H
#error Do not include this file directly; include tbb_machine.h instead
#endif

#include <stdint.h>
#include <unistd.h>
#include <sched.h>
#include <ia64intrin.h>

#define __TBB_WORDSIZE 8
#define __TBB_BIG_ENDIAN 0
#define __TBB_DECL_FENCED_ATOMICS 1

// Most of the functions will be in a .s file

extern "C" {
    int8_t __TBB_machine_cmpswp1__TBB_full_fence (volatile void *ptr, int8_t value, int8_t comparand); 
    int8_t __TBB_machine_fetchadd1__TBB_full_fence (volatile void *ptr, int8_t addend);
    int8_t __TBB_machine_fetchadd1acquire(volatile void *ptr, int8_t addend);
    int8_t __TBB_machine_fetchadd1release(volatile void *ptr, int8_t addend);
    int8_t __TBB_machine_fetchstore1acquire(volatile void *ptr, int8_t value);
    int8_t __TBB_machine_fetchstore1release(volatile void *ptr, int8_t value);

    int16_t __TBB_machine_cmpswp2__TBB_full_fence (volatile void *ptr, int16_t value, int16_t comparand);
    int16_t __TBB_machine_fetchadd2__TBB_full_fence (volatile void *ptr, int16_t addend);
    int16_t __TBB_machine_fetchadd2acquire(volatile void *ptr, int16_t addend);
    int16_t __TBB_machine_fetchadd2release(volatile void *ptr, int16_t addend);
    int16_t __TBB_machine_fetchstore2acquire(volatile void *ptr, int16_t value);
    int16_t __TBB_machine_fetchstore2release(volatile void *ptr, int16_t value);

    int32_t __TBB_machine_fetchstore4__TBB_full_fence (volatile void *ptr, int32_t value);
    int32_t __TBB_machine_fetchstore4acquire(volatile void *ptr, int32_t value);
    int32_t __TBB_machine_fetchstore4release(volatile void *ptr, int32_t value);
    int32_t __TBB_machine_fetchadd4acquire(volatile void *ptr, int32_t addend);
    int32_t __TBB_machine_fetchadd4release(volatile void *ptr, int32_t addend);

    int64_t __TBB_machine_cmpswp8__TBB_full_fence (volatile void *ptr, int64_t value, int64_t comparand);
    int64_t __TBB_machine_fetchstore8__TBB_full_fence (volatile void *ptr, int64_t value);
    int64_t __TBB_machine_fetchstore8acquire(volatile void *ptr, int64_t value);
    int64_t __TBB_machine_fetchstore8release(volatile void *ptr, int64_t value);
    int64_t __TBB_machine_fetchadd8acquire(volatile void *ptr, int64_t addend);
    int64_t __TBB_machine_fetchadd8release(volatile void *ptr, int64_t addend);

    int8_t __TBB_machine_cmpswp1acquire(volatile void *ptr, int8_t value, int8_t comparand); 
    int8_t __TBB_machine_cmpswp1release(volatile void *ptr, int8_t value, int8_t comparand); 
    int8_t __TBB_machine_fetchstore1__TBB_full_fence (volatile void *ptr, int8_t value);

    int16_t __TBB_machine_cmpswp2acquire(volatile void *ptr, int16_t value, int16_t comparand); 
    int16_t __TBB_machine_cmpswp2release(volatile void *ptr, int16_t value, int16_t comparand); 
    int16_t __TBB_machine_fetchstore2__TBB_full_fence (volatile void *ptr, int16_t value);

    int32_t __TBB_machine_cmpswp4__TBB_full_fence (volatile void *ptr, int32_t value, int32_t comparand);
    int32_t __TBB_machine_cmpswp4acquire(volatile void *ptr, int32_t value, int32_t comparand); 
    int32_t __TBB_machine_cmpswp4release(volatile void *ptr, int32_t value, int32_t comparand); 
    int32_t __TBB_machine_fetchadd4__TBB_full_fence (volatile void *ptr, int32_t value);

    int64_t __TBB_machine_cmpswp8acquire(volatile void *ptr, int64_t value, int64_t comparand); 
    int64_t __TBB_machine_cmpswp8release(volatile void *ptr, int64_t value, int64_t comparand); 
    int64_t __TBB_machine_fetchadd8__TBB_full_fence (volatile void *ptr, int64_t value);

    int64_t __TBB_machine_lg(uint64_t value);
    void __TBB_machine_pause(int32_t delay);
    bool __TBB_machine_trylockbyte( volatile unsigned char &ptr );
    int64_t __TBB_machine_lockbyte( volatile unsigned char &ptr );
}

#define __TBB_CompareAndSwap1(P,V,C) __TBB_machine_cmpswp1__TBB_full_fence(P,V,C)
#define __TBB_CompareAndSwap2(P,V,C) __TBB_machine_cmpswp2__TBB_full_fence(P,V,C) 

#define __TBB_FetchAndAdd1(P,V)        __TBB_machine_fetchadd1__TBB_full_fence(P,V)
#define __TBB_FetchAndAdd1acquire(P,V) __TBB_machine_fetchadd1acquire(P,V)
#define __TBB_FetchAndAdd1release(P,V) __TBB_machine_fetchadd1release(P,V)
#define __TBB_FetchAndAdd2(P,V)        __TBB_machine_fetchadd2__TBB_full_fence(P,V)
#define __TBB_FetchAndAdd2acquire(P,V) __TBB_machine_fetchadd2acquire(P,V)
#define __TBB_FetchAndAdd2release(P,V) __TBB_machine_fetchadd2release(P,V)
#define __TBB_FetchAndAdd4acquire(P,V) __TBB_machine_fetchadd4acquire(P,V)
#define __TBB_FetchAndAdd4release(P,V) __TBB_machine_fetchadd4release(P,V)
#define __TBB_FetchAndAdd8acquire(P,V) __TBB_machine_fetchadd8acquire(P,V)
#define __TBB_FetchAndAdd8release(P,V) __TBB_machine_fetchadd8release(P,V)

#define __TBB_FetchAndStore1acquire(P,V) __TBB_machine_fetchstore1acquire(P,V)
#define __TBB_FetchAndStore1release(P,V) __TBB_machine_fetchstore1release(P,V)
#define __TBB_FetchAndStore2acquire(P,V) __TBB_machine_fetchstore2acquire(P,V)
#define __TBB_FetchAndStore2release(P,V) __TBB_machine_fetchstore2release(P,V)
#define __TBB_FetchAndStore4acquire(P,V) __TBB_machine_fetchstore4acquire(P,V)
#define __TBB_FetchAndStore4release(P,V) __TBB_machine_fetchstore4release(P,V)
#define __TBB_FetchAndStore8acquire(P,V) __TBB_machine_fetchstore8acquire(P,V)
#define __TBB_FetchAndStore8release(P,V) __TBB_machine_fetchstore8release(P,V)

#define __TBB_CompareAndSwap1acquire(P,V,C) __TBB_machine_cmpswp1acquire(P,V,C)
#define __TBB_CompareAndSwap1release(P,V,C) __TBB_machine_cmpswp1release(P,V,C)
#define __TBB_CompareAndSwap2acquire(P,V,C) __TBB_machine_cmpswp2acquire(P,V,C)
#define __TBB_CompareAndSwap2release(P,V,C) __TBB_machine_cmpswp2release(P,V,C)
#define __TBB_CompareAndSwap4(P,V,C)        __TBB_machine_cmpswp4__TBB_full_fence(P,V,C)
#define __TBB_CompareAndSwap4acquire(P,V,C) __TBB_machine_cmpswp4acquire(P,V,C)
#define __TBB_CompareAndSwap4release(P,V,C) __TBB_machine_cmpswp4release(P,V,C)
#define __TBB_CompareAndSwap8(P,V,C)        __TBB_machine_cmpswp8__TBB_full_fence(P,V,C)
#define __TBB_CompareAndSwap8acquire(P,V,C) __TBB_machine_cmpswp8acquire(P,V,C)
#define __TBB_CompareAndSwap8release(P,V,C) __TBB_machine_cmpswp8release(P,V,C)

#define __TBB_FetchAndAdd4(P,V) __TBB_machine_fetchadd4__TBB_full_fence(P,V)
#define __TBB_FetchAndAdd8(P,V) __TBB_machine_fetchadd8__TBB_full_fence(P,V)

#define __TBB_FetchAndStore1(P,V) __TBB_machine_fetchstore1__TBB_full_fence(P,V)
#define __TBB_FetchAndStore2(P,V) __TBB_machine_fetchstore2__TBB_full_fence(P,V)
#define __TBB_FetchAndStore4(P,V) __TBB_machine_fetchstore4__TBB_full_fence(P,V)
#define __TBB_FetchAndStore8(P,V) __TBB_machine_fetchstore8__TBB_full_fence(P,V)

#define __TBB_FetchAndIncrementWacquire(P) __TBB_FetchAndAdd8acquire(P,1)
#define __TBB_FetchAndDecrementWrelease(P) __TBB_FetchAndAdd8release(P,-1)

#ifndef __INTEL_COMPILER
template<typename T, typename V>
inline void __TBB_store_with_release_via_explicit_fence(volatile T& location, V value) {
    __asm__ __volatile__("": : :"memory");
    location = value;
}

//! Load with acquire semantics, both for hardware and compiler.
/** Even though GCC imbues volatile loads with acquire semantics, 
    it sometimes hoists loads over the acquire fence.  We use
    an explicit memory fence to prevent such incorrect hoisting. */
template<typename T>
inline T __TBB_load_with_acquire_via_explicit_fence(const volatile T& location) {
    T tmp = location;
    __asm__ __volatile__("": : :"memory");
    return tmp;
}
#define __TBB_load_with_acquire(L)    __TBB_load_with_acquire_via_explicit_fence(L)
#define __TBB_store_with_release(L,V) __TBB_store_with_release_via_explicit_fence(L,V)
#endif

// Special atomic functions
#define __TBB_CompareAndSwapW(P,V,C)   __TBB_CompareAndSwap8(P,V,C)
#define __TBB_FetchAndStoreW(P,V)      __TBB_FetchAndStore8(P,V)
#define __TBB_FetchAndAddW(P,V)        __TBB_FetchAndAdd8(P,V)
#define __TBB_FetchAndAddWrelease(P,V) __TBB_FetchAndAdd8release(P,V)

// Not needed
#undef __TBB_Store8
#undef __TBB_Load8

// Definition of Lock functions
#define __TBB_TryLockByte(P) __TBB_machine_trylockbyte(P)
#define __TBB_LockByte(P)    __TBB_machine_lockbyte(P)

// Definition of other utility functions
#define __TBB_Yield()  sched_yield()
#define __TBB_Pause(V) __TBB_machine_pause(V)
#define __TBB_Log2(V)  __TBB_machine_lg(V)