Win32 signals cleanup. Patch by Magnus Hagander, with input from Claudio

Natoli and Bruce Momjian (and some cosmetic fixes from Neil Conway).
Changes:

    - remove duplicate signal definitions from pqsignal.h

    - replace pqkill() with kill() and redefine kill() in Win32

    - use ereport() in place of fprintf() in some error handling in
      pqsignal.c

    - export pg_queue_signal() and make use of it where necessary

    - add a console control handler for Ctrl-C and similar handling
      on Win32

    - do WaitForSingleObjectEx() in CHECK_FOR_INTERRUPTS() on Win32;
      query cancelling should now work on Win32

    - various other fixes and cleanups

1 files changed, 11 insertions, 1 deletions

diff --git a/src/include/miscadmin.h b/src/include/miscadmin.h
index 1f71a434c17..7e9a209331e 100644
--- a/src/include/miscadmin.h
+++ b/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 1.151 2004/02/06 19:36:18 wieck Exp $
+ * $PostgreSQL: pgsql/src/include/miscadmin.h,v 1.152 2004/02/08 22:28:57 neilc Exp $
  *
  * NOTES
  *	  some of the information in this file should be moved to
@@ -74,11 +74,21 @@ extern volatile uint32 CritSectionCount;
 /* in postgres.c */
 extern void ProcessInterrupts(void);
 
+#ifndef WIN32
 #define CHECK_FOR_INTERRUPTS() \
 do { \
 	if (InterruptPending) \
 		ProcessInterrupts(); \
 } while(0)
+#else
+#define CHECK_FOR_INTERRUPTS() \
+do { \
+	WaitForSingleObjectEx(GetCurrentThread(),0,TRUE);	\
+	if (InterruptPending) \
+		ProcessInterrupts(); \
+} while (0)
+#endif
+
 
 #define HOLD_INTERRUPTS()  (InterruptHoldoffCount++)