Satoshi Ishikawa <power@sekine.densi.gifu-u.ac.jp>
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/storage/ipc/Attic/s_lock.c,v 1.12 1997/03/12 21:06:48 scrappy Exp $
+ * $Header: /cvsroot/pgsql/src/backend/storage/ipc/Attic/s_lock.c,v 1.13 1997/04/24 02:35:35 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#endif
+#if defined(linux) && defined(sparc)
+
+int
+tas(slock_t *m)
+{
+ slock_t res;
+ __asm__("ldstub [%1], %0"
+ : "=&r" (res)
+ : "r" (m));
+ return (res != 0);
+}
+
+void
+S_LOCK(slock_t *lock)
+{
+ while (tas(lock))
+ ;
+}
+
+void
+S_UNLOCK(slock_t *lock)
+{
+ *lock = 0;
+}
+
+void
+S_INIT_LOCK(slock_t *lock)
+{
+ S_UNLOCK(lock);
+}
+
+#endif /* defined(linux) && defined(sparc) */
+
#endif /* HAS_TEST_AND_SET */
# define HAS_TEST_AND_SET
typedef unsigned char slock_t;
# endif
+# if defined(sparc)
+# undef NEED_I386_TAS_ASM
+# endif