X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/dff9e15c44ab6340d27215957c56fa72fad246a2..fa798894e27f82493fa87e7a69d7e3f6b3815053:/src/xbt/fifo.c

diff --git a/src/xbt/fifo.c b/src/xbt/fifo.c
index de76e6416d..7a425f687c 100644
--- a/src/xbt/fifo.c
+++ b/src/xbt/fifo.c
@@ -1,6 +1,5 @@
-/* 	$Id$	 */
-
-/* Copyright (c) 2004 Arnaud Legrand. All rights reserved.                  */
+/* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010. 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. */
@@ -14,7 +13,7 @@
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_fifo, xbt, "FIFO");
 
 static void *fifo_item_mallocator_new_f(void);
-static void fifo_item_mallocator_free_f(void *item);
+#define fifo_item_mallocator_free_f xbt_free_f
 static void fifo_item_mallocator_reset_f(void *item);
 
 static xbt_mallocator_t item_mallocator = NULL;
@@ -27,28 +26,34 @@ xbt_fifo_t xbt_fifo_new(void)
   xbt_fifo_t fifo;
   fifo = xbt_new0(struct xbt_fifo, 1);
 
-  if (item_mallocator == NULL) {
-    item_mallocator = xbt_mallocator_new(256,
-                                         fifo_item_mallocator_new_f,
-                                         fifo_item_mallocator_free_f,
-                                         fifo_item_mallocator_reset_f);
-  }
   return fifo;
 }
 
+
 /** Destructor
  * \param l poor victim
  *
  * Free the fifo structure. None of the objects that was in the fifo is however modified.
  */
 void xbt_fifo_free(xbt_fifo_t l)
+{
+  xbt_fifo_reset(l);
+  xbt_free(l);
+}
+
+/**
+ * \brief Makes a fifo empty.
+ * \param l a fifo
+ *
+ * None of the objects that was in the fifo is however modified.
+ */
+void xbt_fifo_reset(xbt_fifo_t l)
 {
   xbt_fifo_item_t b, tmp;
 
   for (b = xbt_fifo_get_first_item(l); b;
        tmp = b, b = b->next, xbt_fifo_free_item(tmp));
-  xbt_free(l);
-  return;
+  l->head = l->tail = NULL;
 }
 
 /** Push
@@ -138,7 +143,7 @@ void *xbt_fifo_shift(xbt_fifo_t l)
  */
 void xbt_fifo_push_item(xbt_fifo_t l, xbt_fifo_item_t new)
 {
-  xbt_assert0((new->next == NULL) && (new->prev == NULL), "Invalid item!");
+  xbt_assert((new->next == NULL) && (new->prev == NULL), "Invalid item!");
   (l->count)++;
   if (l->head == NULL) {
     l->head = new;
@@ -186,7 +191,7 @@ xbt_fifo_item_t xbt_fifo_pop_item(xbt_fifo_t l)
  */
 void xbt_fifo_unshift_item(xbt_fifo_t l, xbt_fifo_item_t new)
 {
-  xbt_assert0((new->next == NULL) && (new->prev == NULL), "Invalid item!");
+  xbt_assert((new->next == NULL) && (new->prev == NULL), "Invalid item!");
   (l->count)++;
   if (l->head == NULL) {
     l->head = new;
@@ -288,7 +293,7 @@ int xbt_fifo_remove_all(xbt_fifo_t l, void *t)
 void xbt_fifo_remove_item(xbt_fifo_t l, xbt_fifo_item_t current)
 {
   if (l->head == l->tail) {     /* special case */
-    xbt_assert0((current == l->head), "This item is not in the list!");
+    xbt_assert((current == l->head), "This item is not in the list!");
     l->head = NULL;
     l->tail = NULL;
     (l->count)--;
@@ -370,11 +375,6 @@ static void *fifo_item_mallocator_new_f(void)
   return xbt_new(s_xbt_fifo_item_t, 1);
 }
 
-static void fifo_item_mallocator_free_f(void *item)
-{
-  xbt_free(item);
-}
-
 static void fifo_item_mallocator_reset_f(void *item)
 {
   /* memset to zero like calloc */
@@ -384,16 +384,16 @@ static void fifo_item_mallocator_reset_f(void *item)
 /** Constructor
  * \return a new bucket
  */
-xbt_fifo_item_t xbt_fifo_new_item(void)
+XBT_INLINE xbt_fifo_item_t xbt_fifo_new_item(void)
 {
   return xbt_mallocator_get(item_mallocator);
 }
 
 /** \deprecated Use #xbt_fifo_new_item instead.
  */
-xbt_fifo_item_t xbt_fifo_newitem(void)
+XBT_INLINE xbt_fifo_item_t xbt_fifo_newitem(void)
 {
-  WARN0("This function is deprecated. Use xbt_fifo_new_item.");
+  XBT_WARN("This function is deprecated. Use xbt_fifo_new_item.");
   return xbt_fifo_new_item();
 }
 
@@ -403,7 +403,7 @@ xbt_fifo_item_t xbt_fifo_newitem(void)
  *
  * stores \a v in \a i.
  */
-void xbt_fifo_set_item_content(xbt_fifo_item_t i, void *v)
+XBT_INLINE void xbt_fifo_set_item_content(xbt_fifo_item_t i, void *v)
 {
   xbt_fifo_setItemcontent(i, v);
 }
@@ -412,7 +412,7 @@ void xbt_fifo_set_item_content(xbt_fifo_item_t i, void *v)
  * \param i a bucket
  * \return the object stored \a i.
  */
-void *xbt_fifo_get_item_content(xbt_fifo_item_t i)
+XBT_INLINE void *xbt_fifo_get_item_content(xbt_fifo_item_t i)
 {
   return xbt_fifo_getItemcontent(i);
 }
@@ -422,7 +422,7 @@ void *xbt_fifo_get_item_content(xbt_fifo_item_t i)
  *
  * Free the bucket but does not modifies the object (if any) that was stored in it.
  */
-void xbt_fifo_free_item(xbt_fifo_item_t b)
+XBT_INLINE void xbt_fifo_free_item(xbt_fifo_item_t b)
 {
   xbt_mallocator_release(item_mallocator, b);
   return;
@@ -431,9 +431,9 @@ void xbt_fifo_free_item(xbt_fifo_item_t b)
 /** Destructor
  * \deprecated Use #xbt_fifo_free_item instead.
  */
-void xbt_fifo_freeitem(xbt_fifo_item_t b)
+XBT_INLINE void xbt_fifo_freeitem(xbt_fifo_item_t b)
 {
-  WARN0("This function is deprecated. Use xbt_fifo_free_item.");
+  XBT_WARN("This function is deprecated. Use xbt_fifo_free_item.");
   xbt_fifo_free_item(b);
   return;
 }
@@ -442,7 +442,7 @@ void xbt_fifo_freeitem(xbt_fifo_item_t b)
  * \param f a list
  * \return the number of buckets in \a f.
  */
-int xbt_fifo_size(xbt_fifo_t f)
+XBT_INLINE int xbt_fifo_size(xbt_fifo_t f)
 {
   return f->count;
 }
@@ -450,25 +450,40 @@ int xbt_fifo_size(xbt_fifo_t f)
 /**
  * \param l a list
  * \return the head of \a l.
+ *
+ * Returns NULL if the list is empty.
  */
-xbt_fifo_item_t xbt_fifo_get_first_item(xbt_fifo_t l)
+XBT_INLINE xbt_fifo_item_t xbt_fifo_get_first_item(xbt_fifo_t l)
 {
   return l->head;
 }
 
+/**
+ * \param l a list
+ * \return the tail of \a l.
+ *
+ * Returns NULL if the list is empty.
+ */
+XBT_INLINE xbt_fifo_item_t xbt_fifo_get_last_item(xbt_fifo_t l)
+{
+  return l->tail;
+}
+
 /** \deprecated Use #xbt_fifo_get_first_item instead.
  */
-xbt_fifo_item_t xbt_fifo_getFirstItem(xbt_fifo_t l)
+XBT_INLINE xbt_fifo_item_t xbt_fifo_getFirstItem(xbt_fifo_t l)
 {
-  WARN0("This function is deprecated. Use xbt_fifo_get_first_item.");
+  XBT_WARN("This function is deprecated. Use xbt_fifo_get_first_item.");
   return xbt_fifo_get_first_item(l);
 }
 
 /**
  * \param i a bucket
  * \return the bucket that comes next
+ *
+ * Returns NULL if \a i is the tail of the list.
  */
-xbt_fifo_item_t xbt_fifo_get_next_item(xbt_fifo_item_t i)
+XBT_INLINE xbt_fifo_item_t xbt_fifo_get_next_item(xbt_fifo_item_t i)
 {
   if (i)
     return i->next;
@@ -479,15 +494,17 @@ xbt_fifo_item_t xbt_fifo_get_next_item(xbt_fifo_item_t i)
  */
 xbt_fifo_item_t xbt_fifo_getNextItem(xbt_fifo_item_t i)
 {
-  WARN0("This function is deprecated. Use xbt_fifo_get_next_item.");
+  XBT_WARN("This function is deprecated. Use xbt_fifo_get_next_item.");
   return xbt_fifo_get_next_item(i);
 }
 
 /**
  * \param i a bucket
  * \return the bucket that is just before \a i.
+ *
+ * Returns NULL if \a i is the head of the list.
  */
-xbt_fifo_item_t xbt_fifo_get_prev_item(xbt_fifo_item_t i)
+XBT_INLINE xbt_fifo_item_t xbt_fifo_get_prev_item(xbt_fifo_item_t i)
 {
   if (i)
     return i->prev;
@@ -498,15 +515,23 @@ xbt_fifo_item_t xbt_fifo_get_prev_item(xbt_fifo_item_t i)
  */
 xbt_fifo_item_t xbt_fifo_getPrevItem(xbt_fifo_item_t i)
 {
-  WARN0("This function is deprecated. Use xbt_fifo_get_prev_item.");
+  XBT_WARN("This function is deprecated. Use xbt_fifo_get_prev_item.");
   return xbt_fifo_get_prev_item(i);
 }
 
-/**
- * Destroy the fifo item mallocator.
- * This is an internal XBT function called by xbt_exit().
+/* Module init/exit handling the fifo item mallocator
+ * These are internal XBT functions called by xbt_preinit/postexit().
+ * It can be used several times to recreate the mallocator, for example when you switch to MC mode
  */
-void xbt_fifo_exit(void)
+void xbt_fifo_preinit(void)
+{
+  item_mallocator = xbt_mallocator_new(65536,
+                                       fifo_item_mallocator_new_f,
+                                       fifo_item_mallocator_free_f,
+                                       fifo_item_mallocator_reset_f);
+}
+
+void xbt_fifo_postexit(void)
 {
   if (item_mallocator != NULL) {
     xbt_mallocator_free(item_mallocator);