Various patches not commited, plus a linux/sparc patch from

scrappy · scrappy · commit 08a5901ba106 · 1997-04-24T02:35:39.000Z
Satoshi Ishikawa &lt;power@sekine.densi.gifu-u.ac.jp&gt;
diff --git a/src/backend/storage/ipc/s_lock.c b/src/backend/storage/ipc/s_lock.c
@@ -7,7 +7,7 @@
  *
  *
  * 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 $
  *
  *-------------------------------------------------------------------------
  */
@@ -453,4 +453,37 @@ S_INIT_LOCK(slock_t *lock)
 
 #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 */
diff --git a/src/include/port/linux.h b/src/include/port/linux.h
@@ -12,3 +12,6 @@
 #    define HAS_TEST_AND_SET
      typedef unsigned char slock_t;
 #  endif
+#  if defined(sparc)
+#    undef NEED_I386_TAS_ASM
+#  endif
