Imported Upstream version 2.13.0

[platform/upstream/git.git] / alloc.c

diff --git a/alloc.c b/alloc.c
index aeae55c..12afadf 100644 (file)
--- a/alloc.c
+++ b/alloc.c
@@ -18,25 +18,6 @@
 
 #define BLOCKING 1024
 
-#define DEFINE_ALLOCATOR(name, type)                           \
-static unsigned int name##_allocs;                             \
-void *alloc_##name##_node(void)                                        \
-{                                                              \
-       static int nr;                                          \
-       static type *block;                                     \
-       void *ret;                                              \
-                                                               \
-       if (!nr) {                                              \
-               nr = BLOCKING;                                  \
-               block = xmalloc(BLOCKING * sizeof(type));       \
-       }                                                       \
-       nr--;                                                   \
-       name##_allocs++;                                        \
-       ret = block++;                                          \
-       memset(ret, 0, sizeof(type));                           \
-       return ret;                                             \
-}
-
 union any_object {
        struct object object;
        struct blob blob;
@@ -45,11 +26,75 @@ union any_object {
        struct tag tag;
 };
 
-DEFINE_ALLOCATOR(blob, struct blob)
-DEFINE_ALLOCATOR(tree, struct tree)
-DEFINE_ALLOCATOR(commit, struct commit)
-DEFINE_ALLOCATOR(tag, struct tag)
-DEFINE_ALLOCATOR(object, union any_object)
+struct alloc_state {
+       int count; /* total number of nodes allocated */
+       int nr;    /* number of nodes left in current allocation */
+       void *p;   /* first free node in current allocation */
+};
+
+static inline void *alloc_node(struct alloc_state *s, size_t node_size)
+{
+       void *ret;
+
+       if (!s->nr) {
+               s->nr = BLOCKING;
+               s->p = xmalloc(BLOCKING * node_size);
+       }
+       s->nr--;
+       s->count++;
+       ret = s->p;
+       s->p = (char *)s->p + node_size;
+       memset(ret, 0, node_size);
+       return ret;
+}
+
+static struct alloc_state blob_state;
+void *alloc_blob_node(void)
+{
+       struct blob *b = alloc_node(&blob_state, sizeof(struct blob));
+       b->object.type = OBJ_BLOB;
+       return b;
+}
+
+static struct alloc_state tree_state;
+void *alloc_tree_node(void)
+{
+       struct tree *t = alloc_node(&tree_state, sizeof(struct tree));
+       t->object.type = OBJ_TREE;
+       return t;
+}
+
+static struct alloc_state tag_state;
+void *alloc_tag_node(void)
+{
+       struct tag *t = alloc_node(&tag_state, sizeof(struct tag));
+       t->object.type = OBJ_TAG;
+       return t;
+}
+
+static struct alloc_state object_state;
+void *alloc_object_node(void)
+{
+       struct object *obj = alloc_node(&object_state, sizeof(union any_object));
+       obj->type = OBJ_NONE;
+       return obj;
+}
+
+static struct alloc_state commit_state;
+
+unsigned int alloc_commit_index(void)
+{
+       static unsigned int count;
+       return count++;
+}
+
+void *alloc_commit_node(void)
+{
+       struct commit *c = alloc_node(&commit_state, sizeof(struct commit));
+       c->object.type = OBJ_COMMIT;
+       c->index = alloc_commit_index();
+       return c;
+}
 
 static void report(const char *name, unsigned int count, size_t size)
 {
@@ -57,13 +102,14 @@ static void report(const char *name, unsigned int count, size_t size)
                        name, count, (uintmax_t) size);
 }
 
-#define REPORT(name)   \
-    report(#name, name##_allocs, name##_allocs*sizeof(struct name) >> 10)
+#define REPORT(name, type)     \
+    report(#name, name##_state.count, name##_state.count * sizeof(type) >> 10)
 
 void alloc_report(void)
 {
-       REPORT(blob);
-       REPORT(tree);
-       REPORT(commit);
-       REPORT(tag);
+       REPORT(blob, struct blob);
+       REPORT(tree, struct tree);
+       REPORT(commit, struct commit);
+       REPORT(tag, struct tag);
+       REPORT(object, union any_object);
 }