X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/be90de47c20463008fa55dcafee17d506d10bc92..08d324beef1e0fa723013987a98ed7740d2f8343:/src/xbt/mmalloc/mm_legacy.c

diff --git a/src/xbt/mmalloc/mm_legacy.c b/src/xbt/mmalloc/mm_legacy.c
index 2bced98dd1..f7d0f71fd2 100644
--- a/src/xbt/mmalloc/mm_legacy.c
+++ b/src/xbt/mmalloc/mm_legacy.c
@@ -8,29 +8,33 @@
 
 #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;
 }
 
-#ifdef MMALLOC_WANT_OVERIDE_LEGACY
+#ifdef MMALLOC_WANT_OVERRIDE_LEGACY
 void *malloc(size_t n)
 {
-  void *mdp = __mmalloc_current_heap;
-#ifdef HAVE_MMAP
-  if (!mdp)
-    mmalloc_preinit();
-#endif
+  xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit();
+
   LOCK(mdp);
   void *ret = mmalloc(mdp, n);
   UNLOCK(mdp);
@@ -40,18 +44,13 @@ void *malloc(size_t n)
 
 void *calloc(size_t nmemb, size_t size)
 {
-  size_t total_size = nmemb * size;
-  void *mdp = __mmalloc_current_heap;
-#ifdef HAVE_MMAP
-  if (!mdp)
-    mmalloc_preinit();
-#endif
+  xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit();
+
   LOCK(mdp);
-  void *ret = mmalloc(mdp, total_size);
+  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;
 }
@@ -59,21 +58,10 @@ void *calloc(size_t nmemb, size_t size)
 void *realloc(void *p, size_t s)
 {
   void *ret = NULL;
-  void *mdp = __mmalloc_current_heap;
-#ifdef HAVE_MMAP
-  if (!mdp)
-    mmalloc_preinit();
-#endif
+  xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit();
+
   LOCK(mdp);
-  if (s) {
-    if (p)
-      ret = mrealloc(mdp, p, s);
-    else
-      ret = mmalloc(mdp, s);
-  } else {
-    if (p)
-      mfree(mdp, p);
-  }
+  ret = mrealloc(mdp, p, s);
   UNLOCK(mdp);
 
   return ret;
@@ -81,86 +69,12 @@ void *realloc(void *p, size_t s)
 
 void free(void *p)
 {
-  void *mdp = __mmalloc_current_heap;
-#ifdef HAVE_GTNETS
-  if(!mdp) return;
-#endif
+  xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit();
+
   LOCK(mdp);
   mfree(mdp, p);
   UNLOCK(mdp);
 }
 #endif
 
-/* Make sure it works with md==NULL */
-
-/* Safety gap from the heap's break address.
- * Try to increase this first if you experience strange errors under
- * valgrind. */
-#define HEAP_OFFSET   (128UL<<20)
-
-void *mmalloc_get_default_md(void)
-{
-  xbt_assert(__mmalloc_default_mdp);
-  return __mmalloc_default_mdp;
-}
-
-static void mmalloc_fork_prepare(void)
-{
-  struct mdesc* mdp = NULL;
-  if ((mdp =__mmalloc_default_mdp)){
-    while(mdp){
-      LOCK(mdp);
-      if(mdp->fd >= 0){
-        mdp->refcount++;
-      }
-      mdp = mdp->next_mdesc;
-    }
-  }
-}
-
-static void mmalloc_fork_parent(void)
-{
-  struct mdesc* mdp = NULL;
-  if ((mdp =__mmalloc_default_mdp)){
-    while(mdp){
-      if(mdp->fd < 0)
-        UNLOCK(mdp);
-      mdp = mdp->next_mdesc;
-    }
-  }
-}
-
-static void mmalloc_fork_child(void)
-{
-  struct mdesc* mdp = NULL;
-  if ((mdp =__mmalloc_default_mdp)){
-    while(mdp){
-      UNLOCK(mdp);
-      mdp = mdp->next_mdesc;
-    }
-  }
-}
 
-/* Initialize the default malloc descriptor. */
-void mmalloc_preinit(void)
-{
-  int res;
-  if (!__mmalloc_default_mdp) {
-    unsigned long mask = ~((unsigned long)getpagesize() - 1);
-    void *addr = (void*)(((unsigned long)sbrk(0) + HEAP_OFFSET) & mask);
-    __mmalloc_default_mdp = mmalloc_attach(-1, addr);
-    /* Fixme? only the default mdp in protected against forks */
-    res = xbt_os_thread_atfork(mmalloc_fork_prepare,
-			       mmalloc_fork_parent, mmalloc_fork_child);
-    if (res != 0)
-      THROWF(system_error,0,"xbt_os_thread_atfork() failed: return value %d",res);
-  }
-  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);
-}