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atomicity.h (struct __Atomicity_lock<__inst>): Add. 

libstdc++/5037
        * config/cpu/sparc/sparc32/bits/atomicity.h
        (struct __Atomicity_lock<__inst>): Add.
        (__Atomicity_lock<__inst>::_S_atomicity_lock): Add.
        (__exchange_and_add): Use __Atomicity_lock<0>::_S_atomicity_lock
        instead of lock local to static function.
        (__atomic_add): Likewise.

Co-Authored-By: Loren J. Rittle <ljrittle@acm.org>

From-SVN: r47782
This commit is contained in:
Nathan Myers 2001-12-08 00:59:11 +00:00 committed by Loren J. Rittle
parent 941a878b35
commit 7814a308e4
2 changed files with 24 additions and 6 deletions
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11
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,14 @@
2001-12-07 Nathan Myers <ncm@cantrip.org>
Loren Rittle <ljrittle@acm.org>
libstdc++/5037
* config/cpu/sparc/sparc32/bits/atomicity.h
(struct __Atomicity_lock<__inst>): Add.
(__Atomicity_lock<__inst>::_S_atomicity_lock): Add.
(__exchange_and_add): Use __Atomicity_lock<0>::_S_atomicity_lock
instead of lock local to static function.
(__atomic_add): Likewise.
2001-12-07 Phil Edwards <pme@gcc.gnu.org> 2001-12-07 Phil Edwards <pme@gcc.gnu.org>
* src/globals.cc: Remove __GTHREADS guard. * src/globals.cc: Remove __GTHREADS guard.

19
libstdc++-v3/config/cpu/sparc/sparc32/bits/atomicity.h
View File

@ -32,11 +32,19 @@
typedef int _Atomic_word; 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;
static int static int
__attribute__ ((__unused__)) __attribute__ ((__unused__))
__exchange_and_add (volatile _Atomic_word* __mem, int __val) __exchange_and_add (volatile _Atomic_word* __mem, int __val)
{ {
static unsigned char __lock;
_Atomic_word __result, __tmp; _Atomic_word __result, __tmp;
__asm__ __volatile__("1: ldstub [%1], %0\n\t" __asm__ __volatile__("1: ldstub [%1], %0\n\t"
@ -44,13 +52,13 @@ __exchange_and_add (volatile _Atomic_word* __mem, int __val)
" bne 1b\n\t" " bne 1b\n\t"
" nop" " nop"
: "=&r" (__tmp) : "=&r" (__tmp)
: "r" (&__lock) : "r" (&__Atomicity_lock<0>::_S_atomicity_lock)
: "memory"); : "memory");
__result = *__mem; __result = *__mem;
*__mem += __val; *__mem += __val;
__asm__ __volatile__("stb %%g0, [%0]" __asm__ __volatile__("stb %%g0, [%0]"
: /* no outputs */ : /* no outputs */
: "r" (&__lock) : "r" (&__Atomicity_lock<0>::_S_atomicity_lock)
: "memory"); : "memory");
return __result; return __result;
} }
@ -59,7 +67,6 @@ static void
__attribute__ ((__unused__)) __attribute__ ((__unused__))
__atomic_add (volatile _Atomic_word* __mem, int __val) __atomic_add (volatile _Atomic_word* __mem, int __val)
{ {
static unsigned char __lock;
_Atomic_word __tmp; _Atomic_word __tmp;
__asm__ __volatile__("1: ldstub [%1], %0\n\t" __asm__ __volatile__("1: ldstub [%1], %0\n\t"
@ -67,12 +74,12 @@ __atomic_add (volatile _Atomic_word* __mem, int __val)
" bne 1b\n\t" " bne 1b\n\t"
" nop" " nop"
: "=&r" (__tmp) : "=&r" (__tmp)
: "r" (&__lock) : "r" (&__Atomicity_lock<0>::_S_atomicity_lock)
: "memory"); : "memory");
*__mem += __val; *__mem += __val;
__asm__ __volatile__("stb %%g0, [%0]" __asm__ __volatile__("stb %%g0, [%0]"
: /* no outputs */ : /* no outputs */
: "r" (&__lock) : "r" (&__Atomicity_lock<0>::_S_atomicity_lock)
: "memory"); : "memory");
} }