X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/2831d2c37a4dd6d3c5d0df01e6fd0ea5d18627a1..16365fb35791e405d690c88d8c0cd0b28ed10be5:/src/xbt/mmalloc/mm_legacy.c

diff --git a/src/xbt/mmalloc/mm_legacy.c b/src/xbt/mmalloc/mm_legacy.c
index fbfcd95334..f7d0f71fd2 100644
--- a/src/xbt/mmalloc/mm_legacy.c
+++ b/src/xbt/mmalloc/mm_legacy.c
@@ -7,48 +7,50 @@
 /* Redefine the classical malloc/free/realloc functions so that they fit well in the mmalloc framework */
 
 #include "mmprivate.h"
+#include "gras_config.h"
+#include <math.h>
 
-static void *__mmalloc_current_heap = NULL;     /* The heap we are currently using. */
 
-#include "xbt_modinter.h"
+/* The mmalloc() package can use a single implicit malloc descriptor
+   for mmalloc/mrealloc/mfree operations which do not supply an explicit
+   descriptor.  This allows mmalloc() to provide
+   backwards compatibility with the non-mmap'd version. */
+xbt_mheap_t __mmalloc_default_mdp = NULL;
 
-void *mmalloc_get_current_heap(void)
+
+static xbt_mheap_t __mmalloc_current_heap = NULL;     /* The heap we are currently using. */
+
+xbt_mheap_t mmalloc_get_current_heap(void)
 {
   return __mmalloc_current_heap;
 }
 
-void mmalloc_set_current_heap(void *new_heap)
+void mmalloc_set_current_heap(xbt_mheap_t new_heap)
 {
   __mmalloc_current_heap = new_heap;
 }
 
-#if 1//def MMALLOC_WANT_OVERIDE_LEGACY
+#ifdef MMALLOC_WANT_OVERRIDE_LEGACY
 void *malloc(size_t n)
 {
-#ifdef HAVE_MMAP
-  if (!__mmalloc_current_heap)
-    mmalloc_preinit();
-#endif
-  LOCK(__mmalloc_current_heap);
-  void *ret = mmalloc(__mmalloc_current_heap, n);
-  UNLOCK(__mmalloc_current_heap);
+  xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit();
+
+  LOCK(mdp);
+  void *ret = mmalloc(mdp, n);
+  UNLOCK(mdp);
 
   return ret;
 }
 
 void *calloc(size_t nmemb, size_t size)
 {
-  size_t total_size = nmemb * size;
-#ifdef HAVE_MMAP
-  if (!__mmalloc_current_heap)
-    mmalloc_preinit();
-#endif
-  LOCK(__mmalloc_current_heap);
-  void *ret = mmalloc(__mmalloc_current_heap, total_size);
-  UNLOCK(__mmalloc_current_heap);
+  xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit();
+
+  LOCK(mdp);
+  void *ret = mmalloc(mdp, nmemb*size);
+  UNLOCK(mdp);
+  memset(ret, 0, nmemb * size);
 
-  /* Fill the allocated memory with zeroes to mimic calloc behaviour */
-  memset(ret, '\0', total_size);
 
   return ret;
 }
@@ -56,74 +58,23 @@ void *calloc(size_t nmemb, size_t size)
 void *realloc(void *p, size_t s)
 {
   void *ret = NULL;
-#ifdef HAVE_MMAP
-  if (!__mmalloc_current_heap)
-    mmalloc_preinit();
-#endif
-  LOCK(__mmalloc_current_heap);
-  if (s) {
-    if (p)
-      ret = mrealloc(__mmalloc_current_heap, p, s);
-    else
-      ret = mmalloc(__mmalloc_current_heap, s);
-  } else {
-    if (p)
-      mfree(__mmalloc_current_heap, p);
-  }
-  UNLOCK(__mmalloc_current_heap);
+  xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit();
+
+  LOCK(mdp);
+  ret = mrealloc(mdp, p, s);
+  UNLOCK(mdp);
 
   return ret;
 }
 
 void free(void *p)
 {
-  LOCK(__mmalloc_current_heap);
-  mfree(__mmalloc_current_heap, p);
-  UNLOCK(__mmalloc_current_heap);
-}
-#endif
-
-/* Make sure it works with md==NULL */
-
-#define HEAP_OFFSET   (128<<20)  /* Safety gap from the heap's break address.
-                                  * Try to increase this first if you experience
-                                  * strange errors under valgrind. */
-
-void *mmalloc_get_default_md(void)
-{
-  xbt_assert(__mmalloc_default_mdp);
-  return __mmalloc_default_mdp;
-}
-
-static void mmalloc_fork_prepare(void)
-{
-  if (__mmalloc_default_mdp)
-    LOCK(__mmalloc_default_mdp);
-}
+  xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit();
 
-static void mmalloc_fork_finish(void)
-{
-  if (__mmalloc_default_mdp)
-    UNLOCK(__mmalloc_default_mdp);
+  LOCK(mdp);
+  mfree(mdp, p);
+  UNLOCK(mdp);
 }
+#endif
 
-/* Initialize the default malloc descriptor. */
-void mmalloc_preinit(void)
-{
-  if (!__mmalloc_default_mdp) {
-    __mmalloc_default_mdp =
-        mmalloc_attach(-1, (char *) sbrk(0) + HEAP_OFFSET);
-    /* Fixme? only the default mdp in protected against forks */
-    if (xbt_os_thread_atfork(mmalloc_fork_prepare,
-                             mmalloc_fork_finish, mmalloc_fork_finish) != 0)
-      abort();
-  }
-  xbt_assert(__mmalloc_default_mdp != NULL);
-}
 
-void mmalloc_postexit(void)
-{
-  /* Do not detach the default mdp or ldl won't be able to free the memory it allocated since we're in memory */
-  //  mmalloc_detach(__mmalloc_default_mdp);
-  mmalloc_pre_detach(__mmalloc_default_mdp);
-}