S_LOCK_FREE fix.

diff --git a/src/include/storage/s_lock.h b/src/include/storage/s_lock.h
index db697242b34d107baa988cf1de4fc622ed0048f0..927d1d91b17b64c59a95a2e8842ffa755f3b8273 100644 (file)
--- a/src/include/storage/s_lock.h
+++ b/src/include/storage/s_lock.h
@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *   $Header: /cvsroot/pgsql/src/include/storage/s_lock.h,v 1.6 1997/09/24 23:37:26 momjian Exp $
+ *   $Header: /cvsroot/pgsql/src/include/storage/s_lock.h,v 1.7 1997/09/25 01:48:58 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -55,8 +55,6 @@
 
 #define    S_INIT_LOCK(lock)   mutex_init(lock)
 
-#define S_LOCK_FREE(lock)      ((*lock) == 0)
-
  /* S_LOCK_FREE should return 1 if lock is free; 0 if lock is locked */
 /* For Mach, we have to delve inside the entrails of `struct mutex'.  Ick! */
 #define    S_LOCK_FREE(alock)  ((alock)->lock == 0)
@@ -135,8 +133,6 @@ static int  tas(slock_t *lock);
 
 #define    S_INIT_LOCK(lock)   S_UNLOCK(lock)
 
-#define S_LOCK_FREE(lock)      ((*lock) == 0)
-
 #endif                         /* i86pc_solaris || sparc_solaris */
 
 /*
@@ -158,8 +154,6 @@ static int  tas(slock_t *lock);
 
 #define    S_INIT_LOCK(lock)   S_UNLOCK(lock)
 
-#define S_LOCK_FREE(lock)      ((*lock) == 0)
-
 #endif                         /* aix */
 
 /*
@@ -211,8 +205,6 @@ static int  tas(slock_t *lock);
 
 #define    S_INIT_LOCK(lock)   S_UNLOCK(lock)
 
-#define S_LOCK_FREE(lock)      ((*lock) == 0)
-
 static int
 tas_dummy()
 {
@@ -295,8 +287,6 @@ tas_dummy()
 
 #define    S_INIT_LOCK(addr)   (*(addr) = 0)
 
-#define S_LOCK_FREE(lock)      ((*lock) == 0)
-
 #endif                         /* NEED_SPARC_TAS_ASM */
 
 /*
@@ -318,8 +308,6 @@ tas_dummy()
 
 #define    S_INIT_LOCK(lock)   S_UNLOCK(lock)
 
-#define S_LOCK_FREE(lock)      ((*lock) == 0)
-
 #endif                         /* NEED_I386_TAS_ASM */
 
 
@@ -351,8 +339,6 @@ tas_dummy()
 
 #define    S_INIT_LOCK(lock)   S_UNLOCK(lock)
 
-#define S_LOCK_FREE(lock)      ((*lock) == 0)
-
 #endif                         /* defined(__alpha__) && defined(linux) */
 
 #if defined(linux) && defined(sparc)
@@ -372,8 +358,6 @@ tas_dummy()
 
 #define    S_INIT_LOCK(lock)   S_UNLOCK(lock)
 
-#define S_LOCK_FREE(lock)      ((*lock) == 0)
-
 #endif                         /* defined(linux) && defined(sparc) */
 
 #if defined(linux) && defined(PPC)
@@ -407,10 +391,12 @@ success:      \n\
 
 #define    S_INIT_LOCK(lock)   S_UNLOCK(lock)
 
-#define S_LOCK_FREE(lock)      ((*lock) == 0)
-
 #endif                         /* defined(linux) && defined(PPC) */
 
+#ifndef S_LOCK_FREE        /* for those who have not already defined it */
+#define S_LOCK_FREE(lock)      ((*lock) == 0)
+#endif
+
 #endif                         /* HAS_TEST_AND_SET */
 
 #endif                         /* S_LOCK_H */