儲存庫 kBuild 的更動 1859

時間撮記:

2008-10-13 上午04:52:13 (16 年 以前)

作者:

bird

訊息:

kmk: cache 'struct dep' memory to safe time in free() and xmalloc() during snap_deps().

檔案:

• trunk/src/kmk/misc.c (修改) (5 筆差異)

trunk/src/kmk/misc.c

@@ -709 +709 @@
 
 
+#ifdef KMK
+/* Cache free struct dep to save time in free during snap_deps.
+   free is esp. slow on darwin for some reason. */
+static struct dep *free_deps;
+
+static struct dep *
+alloc_dep_int (void)
+{
+    struct dep *d = free_deps;
+    if (d)
+      free_deps = d->next;
+    else
+      d = xmalloc (sizeof (struct dep));
+    return d;
+}
+
+static void
+free_dep_int (struct dep *d)
+{
+  d->next = free_deps;
+  free_deps = d;
+}
+#endif /* KMK */
+
+
 /* Allocate a new `struct dep' with all fields initialized to 0.   */
 
@@ -714 +739 @@
 alloc_dep ()
 {
+#ifndef KMK
   struct dep *d = xmalloc (sizeof (struct dep));
+#else
+  struct dep *d = alloc_dep_int ();
+#endif
   memset (d, '\0', sizeof (struct dep));
   return d;
@@ -725 +754 @@
 free_dep (struct dep *d)
 {
+#ifndef KMK
   free (d);
+#else
+  free_dep_int (d);
+#endif
 }
 
@@ -739 +772 @@
   while (d != 0)
     {
+#ifndef KMK
       struct dep *c = xmalloc (sizeof (struct dep));
+#else
+      struct dep *c = alloc_dep_int ();
+#endif
       memcpy (c, d, sizeof (struct dep));
 
@@ -763 +800 @@
       struct dep *df = d;
       d = d->next;
+#ifndef KMK
       free_dep (df);
+#else
+      free_dep_int (df);
+#endif
     }
 }