1 files changed, 37 insertions, 1 deletions
diff --git a/src/backend/storage/ipc/s_lock.c b/src/backend/storage/ipc/s_lock.c
index 75dd8dcc83a..449b34d12c7 100644
--- 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 1.13 1997/04/24 02:35:35 scrappy Exp $
+ *    $Header: /cvsroot/pgsql/src/backend/storage/ipc/Attic/s_lock.c,v 1.14 1997/06/06 01:37:14 scrappy Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -486,4 +486,40 @@ S_INIT_LOCK(slock_t *lock)
 
 #endif /* defined(linux) && defined(sparc) */
 
+#if defined(NEED_NS32K_TAS_ASM)
+
+int
+tas(slock_t *m)
+{
+    slock_t res = 0;
+    __asm__("movd 8(fp), r1");
+    __asm__("movqd 0, r0");
+    __asm__("sbitd r0, 0(r1)");
+    __asm__("sprb us, %0" : "=r" (res));
+    res =  (res >> 5) & 1;
+    return res;
+}
+
+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 /* NEED_NS32K_TAS_ASM */
+
+
 #endif /* HAS_TEST_AND_SET */