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From: Jeff King <peff@peff.net>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: Stefan Beller <sbeller@google.com>,
	git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>
Subject: [PATCH 4/4] pack-bitmap: drop "loaded" flag
Date: Sat, 1 Sep 2018 03:50:57 -0400	[thread overview]
Message-ID: <20180901075056.GD25461@sigill.intra.peff.net> (raw)
In-Reply-To: <20180901074145.GA24023@sigill.intra.peff.net>

In the early days of the bitmap code, there was a single
static bitmap_index struct that was used behind the scenes,
and any bitmap-related functions could lazily check
bitmap_git.loaded to see if they needed to read the on-disk
data.

But since 3ae5fa0768 (pack-bitmap: remove bitmap_git global
variable, 2018-06-07), the caller is responsible for the
lifetime of the bitmap_index struct, and we return it from
prepare_bitmap_git() and prepare_bitmap_walk(), both of
which load the on-disk data (or return NULL).

So outside of these functions, it's not possible to have a
bitmap_index for which the loaded flag is not true. Nor is
it possible to accidentally pass an already-loaded
bitmap_index to the loading function (which is static-local
to the file).

We can drop this unnecessary and confusing flag.

Signed-off-by: Jeff King <peff@peff.net>
---
 pack-bitmap.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/pack-bitmap.c b/pack-bitmap.c
index 8c1af1cca2..40debd5e20 100644
--- a/pack-bitmap.c
+++ b/pack-bitmap.c
@@ -91,8 +91,6 @@ struct bitmap_index {
 
 	/* Version of the bitmap index */
 	unsigned int version;
-
-	unsigned loaded : 1;
 };
 
 static struct ewah_bitmap *lookup_stored_bitmap(struct stored_bitmap *st)
@@ -306,7 +304,7 @@ static int open_pack_bitmap_1(struct bitmap_index *bitmap_git, struct packed_git
 
 static int load_pack_bitmap(struct bitmap_index *bitmap_git)
 {
-	assert(bitmap_git->map && !bitmap_git->loaded);
+	assert(bitmap_git->map);
 
 	bitmap_git->bitmaps = kh_init_sha1();
 	bitmap_git->ext_index.positions = kh_init_sha1_pos();
@@ -321,7 +319,6 @@ static int load_pack_bitmap(struct bitmap_index *bitmap_git)
 	if (load_bitmap_entries_v1(bitmap_git) < 0)
 		goto failed;
 
-	bitmap_git->loaded = 1;
 	return 0;
 
 failed:
@@ -336,7 +333,7 @@ static int open_pack_bitmap(struct bitmap_index *bitmap_git)
 	struct packed_git *p;
 	int ret = -1;
 
-	assert(!bitmap_git->map && !bitmap_git->loaded);
+	assert(!bitmap_git->map);
 
 	for (p = get_packed_git(the_repository); p; p = p->next) {
 		if (open_pack_bitmap_1(bitmap_git, p) == 0)
@@ -738,7 +735,7 @@ struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs)
 	 * from disk. this is the point of no return; after this the rev_list
 	 * becomes invalidated and we must perform the revwalk through bitmaps
 	 */
-	if (!bitmap_git->loaded && load_pack_bitmap(bitmap_git) < 0)
+	if (load_pack_bitmap(bitmap_git) < 0)
 		goto cleanup;
 
 	object_array_clear(&revs->pending);
-- 
2.19.0.rc1.549.g6ce4dc0f08

  parent reply	other threads:[~2018-09-01  7:51 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-21 18:41 [PATCH] test-tool.h: include git-compat-util.h Jeff King
2018-08-21 19:03 ` Junio C Hamano
2018-08-21 19:06 ` [PATCH 1/6] t/perf: factor boilerplate out of test_perf Jeff King
2018-08-21 19:06 ` [PATCH 2/6] t/perf: factor out percent calculations Jeff King
2018-08-21 19:06 ` [PATCH 3/6] t/perf: add infrastructure for measuring sizes Jeff King
2018-08-22 13:40   ` Derrick Stolee
2018-08-22 15:31     ` Jeff King
2018-08-21 19:06 ` [PATCH 4/6] t/perf: add perf tests for fetches from a bitmapped server Jeff King
2018-08-21 19:07 ` [PATCH 5/6] pack-bitmap: save "have" bitmap from walk Jeff King
2018-08-21 19:47   ` Derrick Stolee
2018-08-21 19:54     ` Jeff King
2018-08-31 15:23   ` Ævar Arnfjörð Bjarmason
2018-08-31 22:55     ` Jeff King
2018-09-01  7:41       ` [PATCH 0/4] un-breaking pack-objects with bitmaps Jeff King
2018-09-01  7:44         ` [PATCH 1/4] bitmap_has_sha1_in_uninteresting(): drop BUG check Jeff King
2018-09-01  7:48         ` [PATCH 2/4] t5310: test delta reuse with bitmaps Jeff King
2018-09-01  8:03           ` Jeff King
2018-09-01 20:29             ` Ævar Arnfjörð Bjarmason
2018-09-01 22:46               ` Ben Peart
2018-09-02  5:51               ` Jeff King
2018-09-04 19:05             ` Stefan Beller
2018-09-04 19:45               ` Junio C Hamano
2018-09-04 20:02               ` Jeff King
2018-09-01  7:49         ` [PATCH 3/4] traverse_bitmap_commit_list(): don't free result Jeff King
2018-09-01  7:50         ` Jeff King [this message]
2018-09-04 19:30         ` [PATCH 0/4] un-breaking pack-objects with bitmaps Stefan Beller
2018-09-04 20:03           ` Jeff King
2018-09-08  6:43         ` Ævar Arnfjörð Bjarmason
2018-09-10 16:53           ` Junio C Hamano
2018-09-10 18:48             ` Jeff King
2018-09-10 19:23               ` Junio C Hamano
2018-08-21 19:07 ` [PATCH 6/6] pack-objects: reuse on-disk deltas for thin "have" objects Jeff King
2018-08-21 19:43   ` Junio C Hamano
2018-08-21 19:50     ` Junio C Hamano
2018-08-21 20:07       ` Jeff King
2018-08-21 20:14         ` Jeff King
2018-08-21 20:52           ` Junio C Hamano
2018-08-21 21:30             ` Jeff King
2018-08-21 20:57         ` Junio C Hamano
2018-08-21 21:32           ` Jeff King
2018-08-23  0:43           ` [PATCH 0/9] trailer-parsing false positives Jeff King
2018-08-23  0:44             ` [PATCH 1/9] trailer: use size_t for string offsets Jeff King
2018-08-23  0:45             ` [PATCH 2/9] trailer: use size_t for iterating trailer list Jeff King
2018-08-23  0:46             ` [PATCH 3/9] trailer: pass process_trailer_opts to trailer_info_get() Jeff King
2018-08-23  0:48             ` [PATCH 4/9] interpret-trailers: tighten check for "---" patch boundary Jeff King
2018-08-23  0:49             ` [PATCH 5/9] interpret-trailers: allow suppressing "---" divider Jeff King
2018-08-23  0:50             ` [PATCH 6/9] pretty, ref-filter: format %(trailers) with no_divider option Jeff King
2018-08-23  0:50             ` [PATCH 7/9] sequencer: ignore "---" divider when parsing trailers Jeff King
2018-08-23  0:50             ` [PATCH 8/9] append_signoff: use size_t for string offsets Jeff King
2018-08-23  0:51             ` [PATCH 9/9] sequencer: handle ignore_footer when parsing trailers Jeff King
2018-08-23 18:30             ` [PATCH 0/9] trailer-parsing false positives Junio C Hamano
2018-08-24  7:26               ` Jeff King
2018-08-21 20:00     ` [PATCH 6/6] pack-objects: reuse on-disk deltas for thin "have" objects Jeff King

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