branches/innodb+: Merge revisions 6801:6853 from branches/zip:

------------------------------------------------------------------------
  r6805 | inaam | 2010-03-11 23:15:17 +0200 (Thu, 11 Mar 2010) | 6 lines
  Changed paths:
     M /branches/zip/os/os0file.c

  branches/zip issue#463

  Fixed compiler warning about uninitialized variable.

  Non-functional change.
  ------------------------------------------------------------------------
  r6828 | calvin | 2010-03-17 17:16:38 +0200 (Wed, 17 Mar 2010) | 7 lines
  Changed paths:
     M /branches/zip/CMakeLists.txt

  branches/zip: rename IB_HAVE_PAUSE_INSTRUCTION to
  HAVE_IB_PAUSE_INSTRUCTION in CMakeLists.txt.

  The rename was done as r5871, but CMakeLists.txt was
  forgotten. Also, add INNODB_RW_LOCKS_USE_ATOMICS to
  CMake.
  ------------------------------------------------------------------------
  r6830 | marko | 2010-03-18 09:48:18 +0200 (Thu, 18 Mar 2010) | 3 lines
  Changed paths:
     M /branches/zip/ChangeLog
     M /branches/zip/include/buf0buf.ic

  branches/zip: buf_page_peek_if_too_old(): Use 32-bit arithmetics
  when comparing the age of access_time to buf_LRU_old_threshold_ms.
  This fixes a bug on 64-bit systems.
  ------------------------------------------------------------------------
  r6840 | calvin | 2010-03-19 00:32:23 +0200 (Fri, 19 Mar 2010) | 6 lines
  Changed paths:
     M /branches/zip/CMakeLists.txt
     M /branches/zip/ChangeLog

  branches/zip: Fix Bug #52102 InnoDB Plugin shows performance drop
  comparing to builtin InnoDB (Windows only).

  Disable Windows atomics by default.

  Approved by: Inaam
  ------------------------------------------------------------------------
  r6853 | marko | 2010-03-22 13:35:29 +0200 (Mon, 22 Mar 2010) | 1 line
  Changed paths:
     M /branches/zip/include/sync0rw.h
     M /branches/zip/include/sync0sync.h

  branches/zip: mutex_own(), rw_lock_own(): Add attribute((warn_unused_result)).
  ------------------------------------------------------------------------

CMakeLists.txt

@@ -234,6 +234,10 @@ SET(INNOBASE_SOURCES	btr/btr0btr.c btr/btr0cur.c btr/btr0pcur.c btr/btr0sea.c
 			usr/usr0sess.c
 			ut/ut0byte.c ut/ut0dbg.c ut/ut0list.c ut/ut0mem.c ut/ut0rbt.c ut/ut0rnd.c
 			ut/ut0ut.c ut/ut0vec.c ut/ut0wqueue.c)
+# Windows atomics do not perform well. Disable Windows atomics by default.
+# See bug#52102 for details.
+#ADD_DEFINITIONS(-DHAVE_WINDOWS_ATOMICS -DINNODB_RW_LOCKS_USE_ATOMICS -DHAVE_IB_PAUSE_INSTRUCTION)
+ADD_DEFINITIONS(-DHAVE_IB_PAUSE_INSTRUCTION)
 
 IF(WITH_INNODB)
   # Legacy option

ChangeLog

@@ -1,3 +1,17 @@
+2010-03-18	The InnoDB Team
+
+	* CMakeLists.txt:
+	Fix Bug #52102 InnoDB Plugin shows performance drop comparing to
+	builtin InnoDB (Windows only).
+	Disable Windows atomics by default.
+
+2010-03-18	The InnoDB Team
+
+	* buf0buf.ic:
+	When comparing the time of the first access to a block against
+	innodb_old_blocks_time, use 32-bit arithmetics.  The comparison
+	was incorrect on 64-bit systems.
+
 2010-03-11	The InnoDB Team
 
 	* buf0buf.h, buf0buf.ic:

include/buf0buf.ic

@@ -81,7 +81,7 @@ buf_page_peek_if_too_old(
 		unsigned	access_time = buf_page_is_accessed(bpage);
 
 		if (access_time > 0
-		    && (ut_time_ms() - access_time)
+		    && ((ib_uint32_t) (ut_time_ms() - access_time))
 		    >= buf_LRU_old_threshold_ms) {
 			return(TRUE);
 		}

include/sync0rw.h

@@ -429,8 +429,9 @@ ibool
 rw_lock_own(
 /*========*/
 	rw_lock_t*	lock,		/*!< in: rw-lock */
-	ulint		lock_type);	/*!< in: lock type: RW_LOCK_SHARED,
+	ulint		lock_type)	/*!< in: lock type: RW_LOCK_SHARED,
 					RW_LOCK_EX */
+	__attribute__((warn_unused_result));
 #endif /* UNIV_SYNC_DEBUG */
 /******************************************************************//**
 Checks if somebody has locked the rw-lock in the specified mode. */

include/sync0sync.h

@@ -206,7 +206,8 @@ UNIV_INTERN
 ibool
 mutex_own(
 /*======*/
-	const mutex_t*	mutex);	/*!< in: mutex */
+	const mutex_t*	mutex)	/*!< in: mutex */
+	__attribute__((warn_unused_result));
 #endif /* UNIV_DEBUG */
 #ifdef UNIV_SYNC_DEBUG
 /******************************************************************//**

os/os0file.c

@@ -4548,6 +4548,9 @@ os_aio_simulated_handle(
 	ulint		n;
 	ulint		i;
 
+	/* Fix compiler warning */
+	*consecutive_ios = NULL;
+
 	segment = os_aio_get_array_and_local_segment(&array, global_segment);
 
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