From: Ramsay Jones <ram...@ramsay1.demon.co.uk>
In order to encapsulate the setting of the unique commit index, commit
969eba63 ("commit: push commit_index update into alloc_commit_node",
10-06-2014) introduced a (logically private) intermediary allocator
function. However, this function (alloc_raw_commit_node()) was declared
as a public function, which undermines its entire purpose.
Introduce an inline function, alloc_node(), which implements the main
logic of the allocator used by DEFINE_ALLOCATOR, and redefine the macro
in terms of the new function. In addition, use the new function in the
implementation of the alloc_commit_node() allocator, rather than the
intermediary allocator, which can now be removed.
Noticed by sparse ("symbol 'alloc_raw_commit_node' was not declared.
Should it be static?").
Signed-off-by: Ramsay Jones <ram...@ramsay1.demon.co.uk>
Signed-off-by: Jeff King <p...@peff.net>
---
alloc.c | 47 +++++++++++++++++++++++++++++------------------
1 file changed, 29 insertions(+), 18 deletions(-)
diff --git a/alloc.c b/alloc.c
index eb22a45..d7c3605 100644
--- a/alloc.c
+++ b/alloc.c
@@ -19,22 +19,10 @@
#define BLOCKING 1024
#define DEFINE_ALLOCATOR(name, type) \
-static unsigned int name##_allocs; \
+static struct alloc_state name##_state; \
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; \
+ return alloc_node(&name##_state, sizeof(type)); \
}
union any_object {
@@ -45,16 +33,39 @@ union any_object {
struct tag tag;
};
+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;
+}
+
DEFINE_ALLOCATOR(blob, struct blob)
DEFINE_ALLOCATOR(tree, struct tree)
-DEFINE_ALLOCATOR(raw_commit, struct commit)
DEFINE_ALLOCATOR(tag, struct tag)
DEFINE_ALLOCATOR(object, union any_object)
+static struct alloc_state commit_state;
+
void *alloc_commit_node(void)
{
static int commit_count;
- struct commit *c = alloc_raw_commit_node();
+ struct commit *c = alloc_node(&commit_state, sizeof(struct commit));
c->index = commit_count++;
return c;
}
@@ -66,13 +77,13 @@ static void report(const char *name, unsigned int count,
size_t size)
}
#define REPORT(name, type) \
- report(#name, name##_allocs, name##_allocs * sizeof(type) >> 10)
+ report(#name, name##_state.count, name##_state.count * sizeof(type) >> 10)
void alloc_report(void)
{
REPORT(blob, struct blob);
REPORT(tree, struct tree);
- REPORT(raw_commit, struct commit);
+ REPORT(commit, struct commit);
REPORT(tag, struct tag);
REPORT(object, union any_object);
}
--
2.0.0.566.gfe3e6b2
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