mirror of
https://github.com/git/git.git
synced 2024-05-26 07:06:13 +02:00
35425d1034
The reftable format includes support for an (OID => ref) map. This map can speed up visibility and reachability checks. In particular, various operations along the fetch/push path within Gerrit have ben sped up by using this structure. The map is constructed with help of a binary tree. Object IDs are hashes, so they are uniformly distributed. Hence, the tree does not attempt forced rebalancing. Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
/*
|
|
Copyright 2020 Google LLC
|
|
|
|
Use of this source code is governed by a BSD-style
|
|
license that can be found in the LICENSE file or at
|
|
https://developers.google.com/open-source/licenses/bsd
|
|
*/
|
|
|
|
#include "tree.h"
|
|
|
|
#include "basics.h"
|
|
#include "record.h"
|
|
#include "test_framework.h"
|
|
#include "reftable-tests.h"
|
|
|
|
static int test_compare(const void *a, const void *b)
|
|
{
|
|
return (char *)a - (char *)b;
|
|
}
|
|
|
|
struct curry {
|
|
void *last;
|
|
};
|
|
|
|
static void check_increasing(void *arg, void *key)
|
|
{
|
|
struct curry *c = arg;
|
|
if (c->last) {
|
|
EXPECT(test_compare(c->last, key) < 0);
|
|
}
|
|
c->last = key;
|
|
}
|
|
|
|
static void test_tree(void)
|
|
{
|
|
struct tree_node *root = NULL;
|
|
|
|
void *values[11] = { NULL };
|
|
struct tree_node *nodes[11] = { NULL };
|
|
int i = 1;
|
|
struct curry c = { NULL };
|
|
do {
|
|
nodes[i] = tree_search(values + i, &root, &test_compare, 1);
|
|
i = (i * 7) % 11;
|
|
} while (i != 1);
|
|
|
|
for (i = 1; i < ARRAY_SIZE(nodes); i++) {
|
|
EXPECT(values + i == nodes[i]->key);
|
|
EXPECT(nodes[i] ==
|
|
tree_search(values + i, &root, &test_compare, 0));
|
|
}
|
|
|
|
infix_walk(root, check_increasing, &c);
|
|
tree_free(root);
|
|
}
|
|
|
|
int tree_test_main(int argc, const char *argv[])
|
|
{
|
|
RUN_TEST(test_tree);
|
|
return 0;
|
|
}
|