my_getpagesize(): New function; returns the size of a page of memory.

                   Versions are defined for Windows and Unix; the Unix
                   flavor uses sysconf() to get the page size; this avoids
                   the use of getpagesize(), which is deprecated and
                   requires an additional library on some platforms
                   (specifically, Reliant UNIX).

This partially closes SourceForge bug #113797.

Modules/mmapmodule.c

@@ -26,6 +26,13 @@
 
 #ifdef MS_WIN32
 #include <windows.h>
+static int
+my_getpagesize(void)
+{
+    SYSTEM_INFO si;
+    GetSystemInfo(&si);
+    return si.dwPageSize;
+}
 #endif
 
 #ifdef UNIX
@@ -38,6 +45,16 @@
 #define MS_SYNC 0
 #endif
 
+#if defined(HAVE_SYSCONF) && defined(_SC_PAGESIZE)
+static int
+my_getpagesize(void)
+{
+    return sysconf(_SC_PAGESIZE);
+}
+#else
+#define my_getpagesize getpagesize
+#endif
+
 #endif /* UNIX */
 
 #include <string.h>
@@ -981,18 +998,7 @@ initmmap(void)
 			      PyInt_FromLong(MAP_ANON) );
 #endif
 
-#ifdef UNIX
 	PyDict_SetItemString (dict, "PAGESIZE",
-			      PyInt_FromLong( (long)getpagesize() ) );
-#endif
-#ifdef MS_WIN32
-	{
-	    SYSTEM_INFO si;
-	    GetSystemInfo(&si);
-	    PyDict_SetItemString (dict, "PAGESIZE",
-				  PyInt_FromLong( si.dwPageSize ) );
-	}
-#endif /* MS_WIN32 */
-
+			      PyInt_FromLong( (long)my_getpagesize() ) );
 }