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[PATCH 04/17] commit: push commit_index update into alloc_commit_node

From
Jeff King <peff@peff.net>
Date
Jun 10, 2014, 21:39 UTC
Message-ID
<20140610213904.GD19147@sigill.intra.peff.net>
In-Reply-To
<20140610213509.GA26979@sigill.intra.peff.net>

Whenever we create a commit object via lookup_commit, we give it a unique index to be used with the commit-slab API. The theory is that any "struct commit" we create would follow this code path, so any such struct would get an index. However, callers could use alloc_commit_node() directly (and get multiple commits with index 0).

Let's push the indexing into alloc_commit_node so that it's hard for callers to get it wrong.

Signed-off-by: Jeff King <peff@peff.net>
---
 alloc.c  | 12 ++++++++++--
 commit.c |  2 --
 2 files changed, 10 insertions(+), 4 deletions(-)
diff --git a/alloc.c b/alloc.c
index 38ff7e7..eb22a45 100644
--- a/alloc.c
+++ b/alloc.c
@@ -47,10 +47,18 @@ union any_object {
 
 DEFINE_ALLOCATOR(blob, struct blob)
 DEFINE_ALLOCATOR(tree, struct tree)
-DEFINE_ALLOCATOR(commit, struct commit)
+DEFINE_ALLOCATOR(raw_commit, struct commit)
 DEFINE_ALLOCATOR(tag, struct tag)
 DEFINE_ALLOCATOR(object, union any_object)
 
+void *alloc_commit_node(void)
+{
+	static int commit_count;
+	struct commit *c = alloc_raw_commit_node();
+	c->index = commit_count++;
+	return c;
+}
+
 static void report(const char *name, unsigned int count, size_t size)
 {
 	fprintf(stderr, "%10s: %8u (%"PRIuMAX" kB)\n",
@@ -64,7 +72,7 @@ void alloc_report(void)
 {
 	REPORT(blob, struct blob);
 	REPORT(tree, struct tree);
-	REPORT(commit, struct commit);
+	REPORT(raw_commit, struct commit);
 	REPORT(tag, struct tag);
 	REPORT(object, union any_object);
 }
diff --git a/commit.c b/commit.c
index bd3d5af..fbdc480 100644
--- a/commit.c
+++ b/commit.c
@@ -17,7 +17,6 @@ static struct commit_extra_header *read_commit_extra_header_lines(const char *bu
 int save_commit_buffer = 1;
 
 const char *commit_type = "commit";
-static int commit_count;
 
 static struct commit *check_commit(struct object *obj,
 				   const unsigned char *sha1,
@@ -64,7 +63,6 @@ struct commit *lookup_commit(const unsigned char *sha1)
 	struct object *obj = lookup_object(sha1);
 	if (!obj) {
 		struct commit *c = alloc_commit_node();
-		c->index = commit_count++;
 		return create_object(sha1, OBJ_COMMIT, c);
 	}
 	if (!obj->type)

-- 
2.0.0.729.g520999f
Previous: Jeff KingNext: Jeff King
Message 39 of 60 in “store length of commit->buffer”
  1. 0/15 store length of commit->bufferJeff King, Jun 9, 2014
  2. 01/15 alloc: include any-object allocations in alloc_reportJeff King, Jun 9, 2014
  3. 02/15 commit: push commit_index update into alloc_commit_nodeJeff King, Jun 9, 2014
  4. Junio C HamanoJun 10, 2014
  5. 03/15 do not create "struct commit" with xcallocJeff King, Jun 9, 2014
  6. Junio C HamanoJun 10, 2014
  7. Jeff KingJun 10, 2014
  8. 04/15 logmsg_reencode: return const bufferJeff King, Jun 9, 2014
  9. Eric SunshineJun 10, 2014
  10. 05/15 sequencer: use logmsg_reencode in get_messageJeff King, Jun 9, 2014
  11. Junio C HamanoJun 10, 2014
  12. Jeff KingJun 10, 2014
  13. 06/15 provide a helper to free commit bufferJeff King, Jun 9, 2014
  14. 07/15 provide a helper to set the commit bufferJeff King, Jun 9, 2014
  15. 08/15 provide helpers to access the commit bufferJeff King, Jun 9, 2014
  16. Eric SunshineJun 10, 2014
  17. 09/15 use get_cached_commit_buffer where appropriateJeff King, Jun 9, 2014
  18. 10/15 use get_commit_buffer to avoid duplicate codeJeff King, Jun 9, 2014
  19. Eric SunshineJun 10, 2014
  20. Jeff KingJun 10, 2014
  21. 11/15 convert logmsg_reencode to get_commit_bufferJeff King, Jun 9, 2014
  22. 12/15 use get_commit_buffer everywhereJeff King, Jun 9, 2014
  23. Junio C HamanoJun 9, 2014
  24. Jeff KingJun 10, 2014
  25. Jeff KingJun 10, 2014
  26. Junio C HamanoJun 10, 2014
  27. Jeff KingJun 10, 2014
  28. 13/15 commit-slab: provide a static initializerJeff King, Jun 9, 2014
  29. 14/15 commit: convert commit->buffer to a slabJeff King, Jun 9, 2014
  30. 15/15 commit: record buffer length in cacheJeff King, Jun 9, 2014
  31. Christian CouderJun 10, 2014
  32. Jeff KingJun 10, 2014
  33. Jeff KingJun 10, 2014
  34. Christian CouderJun 10, 2014
  35. 0/17 store length of commit->bufferJeff King, Jun 10, 2014
  36. 01/17 commit_tree: take a pointer/len pair rather than a const strbufJeff King, Jun 10, 2014
  37. 02/17 replace dangerous uses of strbuf_attachJeff King, Jun 10, 2014
  38. 03/17 alloc: include any-object allocations in alloc_reportJeff King, Jun 10, 2014
  39. 04/17 commit: push commit_index update into alloc_commit_nodeJeff King, Jun 10, 2014
  40. 05/17 do not create "struct commit" with xcallocJeff King, Jun 10, 2014
  41. 06/17 logmsg_reencode: return const bufferJeff King, Jun 10, 2014
  42. 07/17 sequencer: use logmsg_reencode in get_messageJeff King, Jun 10, 2014
  43. 08/17 provide a helper to free commit bufferJeff King, Jun 10, 2014
  44. Junio C HamanoJun 12, 2014
  45. Jeff KingJun 12, 2014
  46. Jeff KingJun 12, 2014
  47. 09/17 provide a helper to set the commit bufferJeff King, Jun 10, 2014
  48. 10/17 provide helpers to access the commit bufferJeff King, Jun 10, 2014
  49. 11/17 use get_cached_commit_buffer where appropriateJeff King, Jun 10, 2014
  50. 12/17 use get_commit_buffer to avoid duplicate codeJeff King, Jun 10, 2014
  51. 13/17 convert logmsg_reencode to get_commit_bufferJeff King, Jun 10, 2014
  52. 14/17 use get_commit_buffer everywhereJeff King, Jun 10, 2014
  53. 15/17 commit-slab: provide a static initializerJeff King, Jun 10, 2014
  54. Junio C HamanoJun 12, 2014
  55. Jeff KingJun 12, 2014
  56. 16/17 commit: convert commit->buffer to a slabJeff King, Jun 10, 2014
  57. 17/17 commit: record buffer length in cacheJeff King, Jun 10, 2014
  58. Jeff KingJun 10, 2014
  59. Junio C HamanoJun 12, 2014
  60. reuse cached commit buffer when parsing signaturesJeff King, Jun 13, 2014

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