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

libstdc++-v3/ChangeLog

+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>
 
 	* src/globals.cc:  Remove __GTHREADS guard.

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

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