Remove sleep() and use single PG_SLEEP call for Win32 signal handling

and consistency.

Change PG_USLEEP to use SleepEx() for signal interuptability.

src/backend/storage/buffer/bufmgr.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.153 2004/01/24 20:00:45 wieck Exp $
+ *	  $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.154 2004/01/30 15:57:03 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1058,10 +1058,7 @@ BufferBackgroundWriter(void)
 		 * Nap for the configured time or sleep for 10 seconds if
 		 * there was nothing to do at all.
 		 */
-		if (n > 0)
-			PG_USLEEP(BgWriterDelay * 1000);
-		else
-			sleep(10);
+		PG_USLEEP((n > 0) ? BgWriterDelay * 1000 : 10000000);
 	}
 }
 

src/include/miscadmin.h

@@ -12,7 +12,7 @@
  * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/miscadmin.h,v 1.148 2004/01/26 22:59:53 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/miscadmin.h,v 1.149 2004/01/30 15:57:04 momjian Exp $
  *
  * NOTES
  *	  some of the information in this file should be moved to
@@ -109,7 +109,7 @@ do { \
 #else
 #define PG_USLEEP(_usec) \
 do { \
-	Sleep((_usec) < 500 ? 1 : ((_usec)+500)/ 1000); \
+	SleepEx(((_usec) < 500 ? 1 : ((_usec) + 500) / 1000), TRUE); \
 } while(0)
 #endif