Cache the size of a memory page for the current system.

[simgrid.git] / src / xbt / xbt_main.c

diff --git a/src/xbt/xbt_main.c b/src/xbt/xbt_main.c
index e09d03d..30c1a84 100644 (file)
--- a/src/xbt/xbt_main.c
+++ b/src/xbt/xbt_main.c
@@ -1,15 +1,15 @@
 /* module handling                                                          */
 
-/* Copyright (c) 2006-2012. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2006-2014. The SimGrid Team.
+ * All rights reserved.                                                     */
 
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
 
 #include "xbt/misc.h"
-#include "simgrid_config.h"     /*HAVE_MMAP _XBT_WIN32 */
-#include "internal_config.h"        /* MMALLOC_WANT_OVERRIDE_LEGACY */
-#include "time.h"               /* to seed the random generator */
-
+#include "simgrid_config.h"     /* _XBT_WIN32 */
+#include "internal_config.h"    /* MMALLOC_WANT_OVERRIDE_LEGACY */
+#include "portable.h"
 #include "xbt/sysdep.h"
 #include "xbt/log.h"
 #include "xbt/dynar.h"
@@ -19,6 +19,10 @@
 
 #include "xbt_modinter.h"       /* prototype of other module's init/exit in XBT */
 
+#include "simgrid/sg_config.h"
+
+#include <stdio.h>
+
 XBT_LOG_NEW_CATEGORY(xbt, "All XBT categories (simgrid toolbox)");
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(module, xbt, "module handling");
 
@@ -29,13 +33,15 @@ char *xbt_binary_name = NULL;   /* Name of the system process containing us (man
 xbt_dynar_t xbt_cmdline = NULL; /* all we got in argv */
 
 int xbt_initialized = 0;
+int _sg_do_clean_atexit = 1;
+
+int xbt_pagesize;
 
 /* Declare xbt_preinit and xbt_postexit as constructor/destructor of the library.
  * This is crude and rather compiler-specific, unfortunately.
  */
 static void xbt_preinit(void) _XBT_GNUC_CONSTRUCTOR(200);
 static void xbt_postexit(void);
-static unsigned int seed = 2147483647;
 
 #ifdef _XBT_WIN32
 # undef _XBT_NEED_INIT_PRAGMA
@@ -77,21 +83,35 @@ BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason,
 
 #endif
 
-static void xbt_preinit(void)
-{
+static void xbt_preinit(void) {
+  unsigned int seed = 2147483647;
+
+  xbt_pagesize = sysconf(_SC_PAGESIZE);
+
 #ifdef MMALLOC_WANT_OVERRIDE_LEGACY
   mmalloc_preinit();
+#endif
+#ifdef _TWO_DIGIT_EXPONENT
+  /* Even printf behaves differently on Windows... */
+  _set_output_format(_TWO_DIGIT_EXPONENT);
 #endif
   xbt_log_preinit();
   xbt_backtrace_preinit();
   xbt_os_thread_mod_preinit();
   xbt_fifo_preinit();
   xbt_dict_preinit();
+   
+  srand(seed);
+#ifndef _WIN32
+  srand48(seed);
+#endif
+
   atexit(xbt_postexit);
 }
 
 static void xbt_postexit(void)
 {
+  if(!_sg_do_clean_atexit) return;
   xbt_backtrace_postexit();
   xbt_fifo_postexit();
   xbt_dict_postexit();
@@ -118,9 +138,6 @@ void xbt_init(int *argc, char **argv)
   for (i=0;i<*argc;i++) {
     xbt_dynar_push(xbt_cmdline,&(argv[i]));
   }
-
-  srand(seed);
-  srand48(seed);
   
   xbt_log_init(argc, argv);
 }