Rework my_getpagesize function

 - Put 'my_getpagesize' in it's own .c file
 - Map the call 'my_getpagesize' directly to 'getpagesize' if it exists
 - Add default implementation for 'my_getpagesize' to be used if no platform
   specfic function exists


include/my_sys.h:
  Break out the defines for my_getpagesize from HAVE_SYS_MMAN_H as they don't depend on that.
  There is a check for the function in configure which defines HAVE_GETPAGESIZE if the function
  exists
mysys/CMakeLists.txt:
  Add new fil my_getpagesize.c
mysys/Makefile.am:
  Add new fil my_getpagesize.c
mysys/my_mmap.c:
  Remove my_getpagesize from my_mmap.c as it's now implemented in my_getpagesize.c
mysys/my_getpagesize.c:
  New BitKeeper file ``mysys/my_getpagesize.c''

include/my_sys.h

@@ -842,12 +842,6 @@ my_bool my_gethwaddr(uchar *to);
 #endif
 
 #define my_mmap(a,b,c,d,e,f)    mmap(a,b,c,d,e,f)
-#ifdef HAVE_GETPAGESIZE
-#define my_getpagesize()        getpagesize()
-#else
-/* qnx ? */
-#define my_getpagesize()        8192
-#endif
 #define my_munmap(a,b)          munmap((a),(b))
 
 #else
@@ -863,11 +857,17 @@ my_bool my_gethwaddr(uchar *to);
 #define HAVE_MMAP
 #endif
 
-int my_getpagesize(void);
 void *my_mmap(void *, size_t, int, int, int, my_off_t);
 int my_munmap(void *, size_t);
 #endif
 
+/* my_getpagesize */
+#ifdef HAVE_GETPAGESIZE
+#define my_getpagesize()        getpagesize()
+#else
+int my_getpagesize(void);
+#endif
+
 int my_msync(int, void *, size_t, int);
 
 /* character sets */

mysys/CMakeLists.txt

@@ -26,4 +26,5 @@ ADD_LIBRARY(mysys array.c charset-def.c charset.c checksum.c default.c default_m
 				my_static.c my_symlink.c my_symlink2.c my_sync.c my_thr_init.c my_wincond.c
 				my_windac.c my_winsem.c my_winthread.c my_write.c ptr_cmp.c queues.c
 				rijndael.c safemalloc.c sha1.c string.c thr_alarm.c thr_lock.c thr_mutex.c
-				thr_rwlock.c tree.c typelib.c base64.c my_memmem.c)
+				thr_rwlock.c tree.c typelib.c base64.c my_memmem.c
+				my_getpagesize.c)

mysys/Makefile.am

@@ -29,7 +29,7 @@ noinst_HEADERS =	mysys_priv.h my_static.h \
 libmysys_a_SOURCES =    my_init.c my_getwd.c mf_getdate.c my_mmap.c \
 			mf_path.c mf_loadpath.c my_file.c \
 			my_open.c my_create.c my_dup.c my_seek.c my_read.c \
-			my_pread.c my_write.c \
+			my_pread.c my_write.c my_getpagesize.c \
 			mf_keycache.c mf_keycaches.c my_crc32.c \
 			mf_iocache.c mf_iocache2.c mf_cache.c mf_tempfile.c \
 			mf_tempdir.c my_lock.c mf_brkhant.c my_alarm.c \

mysys/my_getpagesize.c

+/* Copyright (C) 2000-2003 MySQL AB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+#include "mysys_priv.h"
+
+#ifndef HAVE_GETPAGESIZE
+
+#if defined __WIN__
+
+int my_getpagesize(void)
+{
+  SYSTEM_INFO si;
+  GetSystemInfo(&si);
+  return si.dwPageSize;
+}
+
+#else
+
+/* Default implementation */
+int my_getpagesize(void)
+{
+  return (int)8192;
+}
+
+#endif
+
+#endif
+

mysys/my_mmap.c

@@ -33,13 +33,6 @@ int my_msync(int fd, void *addr, size_t len, int flags)
 static SECURITY_ATTRIBUTES mmap_security_attributes=
   {sizeof(SECURITY_ATTRIBUTES), 0, TRUE};
 
-int my_getpagesize(void)
-{
-  SYSTEM_INFO si;
-  GetSystemInfo(&si);
-  return si.dwPageSize;
-}
-
 void *my_mmap(void *addr, size_t len, int prot,
                int flags, int fd, my_off_t offset)
 {