From: Bruce Momjian <bruce@momjian.us>
Date: Wed, 9 Aug 2006 20:41:07 +0000 (+0000)
Subject: On Win32, make minimum setitimer() sleep be 1ms, so sleeps < 1ms aren't
X-Git-Url: http://git.postgresql.org/gitweb/static/gitweb.js?a=commitdiff_plain;h=3d4e94c99357d819a9bd7ca22061c62da55e25a1;p=users%2Fbernd%2Fpostgres.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 b8f1e8bd68..048bebb058 100644
--- a/src/backend/port/win32/timer.c
+++ b/src/backend/port/win32/timer.c
@@ -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);
 		}