#ifndef _BITS_ATOMICITY_H
#define _BITS_ATOMICITY_H 1
#ifdef __arch64__
typedef long _Atomic_word;
static inline _Atomic_word
__attribute__ ((__unused__))
__exchange_and_add (volatile _Atomic_word *__mem, int __val)
{
_Atomic_word __tmp1, __tmp2;
__asm__ __volatile__("1: ldx [%2], %0\n\t"
" add %0, %3, %1\n\t"
" casx [%2], %0, %1\n\t"
" sub %0, %1, %0\n\t"
" brnz,pn %0, 1b\n\t"
" nop"
: "=&r" (__tmp1), "=&r" (__tmp2)
: "r" (__mem), "r" (__val)
: "memory");
return __tmp2;
}
static inline void
__attribute__ ((__unused__))
__atomic_add (volatile _Atomic_word* __mem, int __val)
{
_Atomic_word __tmp1, __tmp2;
__asm__ __volatile__("1: ldx [%2], %0\n\t"
" add %0, %3, %1\n\t"
" casx [%2], %0, %1\n\t"
" sub %0, %1, %0\n\t"
" brnz,pn %0, 1b\n\t"
" nop"
: "=&r" (__tmp1), "=&r" (__tmp2)
: "r" (__mem), "r" (__val)
: "memory");
}
#else
typedef int _Atomic_word;
template <int __inst>
struct __Atomicity_lock
{
static unsigned char _S_atomicity_lock;
};
template <int __inst>
unsigned char __Atomicity_lock<__inst>::_S_atomicity_lock = 0;
template unsigned char __Atomicity_lock<0>::_S_atomicity_lock;
static int
__attribute__ ((__unused__))
__exchange_and_add (volatile _Atomic_word* __mem, int __val)
{
_Atomic_word __result, __tmp;
__asm__ __volatile__("1: ldstub [%1], %0\n\t"
" cmp %0, 0\n\t"
" bne 1b\n\t"
" nop"
: "=&r" (__tmp)
: "r" (&__Atomicity_lock<0>::_S_atomicity_lock)
: "memory");
__result = *__mem;
*__mem += __val;
__asm__ __volatile__("stb %%g0, [%0]"
:
: "r" (&__Atomicity_lock<0>::_S_atomicity_lock)
: "memory");
return __result;
}
static void
__attribute__ ((__unused__))
__atomic_add (volatile _Atomic_word* __mem, int __val)
{
_Atomic_word __tmp;
__asm__ __volatile__("1: ldstub [%1], %0\n\t"
" cmp %0, 0\n\t"
" bne 1b\n\t"
" nop"
: "=&r" (__tmp)
: "r" (&__Atomicity_lock<0>::_S_atomicity_lock)
: "memory");
*__mem += __val;
__asm__ __volatile__("stb %%g0, [%0]"
:
: "r" (&__Atomicity_lock<0>::_S_atomicity_lock)
: "memory");
}
#endif
#endif