From: Bruce Momjian <bruce@momjian.us>
Date: Wed, 9 Aug 2006 20:40:56 +0000 (+0000)
Subject: On Win32, make minimum setitimer() sleep be 1ms, so sleeps < 1ms aren't
X-Git-Tag: REL8_2_BETA1~357
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0553a0507cd466926cc6902a5c6cf35f920c1e67;p=thirdparty%2Fpostgresql.git

On Win32, make minimum setitimer() sleep be 1ms, so sleeps < 1ms aren't
rounded down to zero.

Backpatch to 8.1.X.
---

diff --git a/src/backend/port/win32/timer.c b/src/backend/port/win32/timer.c
index 0a38f00858e..88d4b6d5857 100644
--- a/src/backend/port/win32/timer.c
+++ b/src/backend/port/win32/timer.c
@@ -11,7 +11,7 @@
  * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/port/win32/timer.c,v 1.10 2006/08/09 17:47:03 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/port/win32/timer.c,v 1.11 2006/08/09 20:40:56 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -56,8 +56,14 @@ pg_timer_thread(LPVOID param)
 				timerCommArea.value.it_value.tv_usec == 0)
 				waittime = INFINITE;	/* Cancel the interrupt */
 			else
+			{
+				/* Minimum wait time is 1ms */
+				if (timerCommArea.value.it_value.tv_sec == 0 &&
+					timerCommArea.value.it_value.tv_usec < 1000)
+					timerCommArea.value.it_value.tv_usec = 1000;
 				/* WaitForSingleObjectEx() uses milliseconds */
 				waittime = timerCommArea.value.it_value.tv_usec / 1000 + timerCommArea.value.it_value.tv_sec * 1000;
+			}
 			ResetEvent(timerCommArea.event);
 			LeaveCriticalSection(&timerCommArea.crit_sec);
 		}