[all] Removed call to getppid in SendPostmasterSignal, replacing with a

PostmasterPid variable, which gets set (early) in PostmasterMain
getppid would not be the postmaster?

[fork/exec] Implements processCancelRequest by keeping an array of

pid/cancel_key structs in shared mem

[fork/exec] Moves AttachSharedMemoryAndSemaphores call for backends into
SubPostmasterMain

[win32] Implements reaper/waitpid by keeping an arrays of children
pids,handles in postmaster local mem
      - this item is largely untested, for reasons which should be
obvious, but appears sound

[win32/all] Added extern for pgpipe in Win32 case, and changed the second
pipe call (which seems to have been missed earlier) to pgpipe

[win32] #define'd ftruncate to chsize in the Win32 case

[win32] PG_USLEEP for Win32 has a misplaced paren. Fixed.

[win32] DLLIMPORT handling for MingW case


Claudio Natoli

src/backend/postmaster/pgstat.c

@@ -13,7 +13,7 @@
  *
  *	Copyright (c) 2001-2003, PostgreSQL Global Development Group
  *
- *	$PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.55 2004/01/26 22:54:56 momjian Exp $
+ *	$PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.56 2004/01/26 22:59:53 momjian Exp $
  * ----------
  */
 #include "postgres.h"
@@ -147,7 +147,7 @@ static void pgstat_recv_resetcounter(PgStat_MsgResetcounter *msg, int len);
 #define piperead(a,b,c)		read(a,b,c)
 #define pipewrite(a,b,c)	write(a,b,c)
 #else
-/* pgpipe() is in /src/port */
+extern int pgpipe(int handles[2]); /* pgpipe() is in /src/port */
 #define piperead(a,b,c)		recv(a,b,c,0)
 #define pipewrite(a,b,c)	send(a,b,c,0)
 #endif
@@ -322,7 +322,7 @@ pgstat_init(void)
 	/*
 	 * Create the pipe that controls the statistics collector shutdown
 	 */
-	if (pipe(pgStatPmPipe) < 0)
+	if (pgpipe(pgStatPmPipe) < 0)
 	{
 		ereport(LOG,
 				(errcode_for_socket_access(),

src/backend/storage/ipc/ipci.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/storage/ipc/ipci.c,v 1.62 2004/01/26 22:54:57 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/storage/ipc/ipci.c,v 1.63 2004/01/26 22:59:53 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -63,6 +63,9 @@ CreateSharedMemoryAndSemaphores(bool makePrivate,
 	size += LWLockShmemSize();
 	size += SInvalShmemSize(maxBackends);
 	size += FreeSpaceShmemSize();
+#ifdef EXEC_BACKEND
+	size += ShmemBackendArraySize();
+#endif
 #ifdef STABLE_MEMORY_STORAGE
 	size += MMShmemSize();
 #endif
@@ -132,6 +135,13 @@ CreateSharedMemoryAndSemaphores(bool makePrivate,
 	 * Set up child-to-postmaster signaling mechanism
 	 */
 	PMSignalInit();
+
+#ifdef EXEC_BACKEND
+	/*
+	 * Alloc the win32 shared backend array
+	 */
+	ShmemBackendArrayAllocation();
+#endif
 }
 
 

src/backend/storage/ipc/pmsignal.c

@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/storage/ipc/pmsignal.c,v 1.10 2004/01/26 22:54:57 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/storage/ipc/pmsignal.c,v 1.11 2004/01/26 22:59:53 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -63,8 +63,8 @@ SendPostmasterSignal(PMSignalReason reason)
 		return;
 	/* Atomically set the proper flag */
 	PMSignalFlags[reason] = true;
-	/* Send signal to postmaster (assume it is our direct parent) */
-	kill(getppid(), SIGUSR1);
+	/* Send signal to postmaster */
+	kill(PostmasterPid, SIGUSR1);
 }
 
 /*

src/backend/tcop/postgres.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.385 2004/01/26 22:54:57 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.386 2004/01/26 22:59:53 momjian Exp $
  *
  * NOTES
  *	  this is the "main" module of the postgres backend and
@@ -2535,9 +2535,7 @@ PostgresMain(int argc, char *argv[], const char *username)
 					 errmsg("invalid command-line arguments for server process"),
 					 errhint("Try \"%s --help\" for more information.", argv[0])));
 		}
-#ifdef EXEC_BACKEND
-		AttachSharedMemoryAndSemaphores();
-#endif
+
 		XLOGPathInit();
 
 		BaseInit();

src/backend/utils/init/globals.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/init/globals.c,v 1.79 2004/01/26 22:54:57 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/init/globals.c,v 1.80 2004/01/26 22:59:53 momjian Exp $
  *
  * NOTES
  *	  Globals used all over the place should be declared here and not
@@ -53,6 +53,8 @@ BackendId	MyBackendId;
 char	   *DatabasePath = NULL;
 Oid			MyDatabaseId = InvalidOid;
 
+pid_t PostmasterPid = 0;
+
 /* these are initialized for the bootstrap/standalone case: */
 bool		IsPostmasterEnvironment = false;
 bool		IsUnderPostmaster = false;

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 1.147 2004/01/26 22:54:57 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/miscadmin.h,v 1.148 2004/01/26 22:59:53 momjian Exp $
  *
  * NOTES
  *	  some of the information in this file should be moved to
@@ -109,10 +109,14 @@ do { \
 #else
 #define PG_USLEEP(_usec) \
 do { \
-	Sleep(_usec < 500) ? 1 : (_usec+500)/ 1000); \
+	Sleep((_usec) < 500 ? 1 : ((_usec)+500)/ 1000); \
 } while(0)
 #endif
 
+#ifdef WIN32
+#define ftruncate(a,b)	chsize(a,b)
+#endif
+
 /*****************************************************************************
  *	  globals.h --															 *
  *****************************************************************************/
@@ -132,6 +136,7 @@ extern void ClosePostmasterPorts(bool pgstat_too);
 /*
  * from utils/init/globals.c
  */
+extern pid_t PostmasterPid;
 extern bool IsPostmasterEnvironment;
 extern bool IsUnderPostmaster;
 

src/include/port/win32.h

-/* $PostgreSQL: pgsql/src/include/port/win32.h,v 1.15 2004/01/26 22:54:58 momjian Exp $ */
+/* $PostgreSQL: pgsql/src/include/port/win32.h,v 1.16 2004/01/26 22:59:54 momjian Exp $ */
 
 /* undefine and redefine after #include */
 #undef mkdir
@@ -15,7 +15,7 @@
 #define NOFILE		  100
 
 /* defines for dynamic linking on Win32 platform */
-#ifdef __CYGWIN__
+#if defined(__CYGWIN__) || defined(__MINGW32__)
 
 #if __GNUC__ && ! defined (__declspec)
 #error You need egcs 1.1 or newer for compiling!
@@ -27,7 +27,7 @@
 #define DLLIMPORT __declspec (dllimport)
 #endif
 
-#elif defined(WIN32) && defined(_MSC_VER)		/* not CYGWIN */
+#elif defined(WIN32) && defined(_MSC_VER)		/* not CYGWIN or MingW */
 
 #if defined(_DLL)
 #define DLLIMPORT __declspec (dllexport)
@@ -35,7 +35,7 @@
 #define DLLIMPORT __declspec (dllimport)
 #endif
 
-#else							/* not CYGWIN, not MSVC */
+#else							/* not CYGWIN, not MSVC, not MingW */
 
 #define DLLIMPORT
 #endif