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-rw-r--r--refs.c59
-rw-r--r--refs.h8
2 files changed, 39 insertions, 28 deletions
diff --git a/refs.c b/refs.c
index 2496d40..ee7e381 100644
--- a/refs.c
+++ b/refs.c
@@ -134,15 +134,15 @@ static struct ref_entry *search_ref_array(struct ref_array *array, const char *n
* Future: need to be in "struct repository"
* when doing a full libification.
*/
-static struct cached_refs {
- struct cached_refs *next;
+static struct ref_cache {
+ struct ref_cache *next;
char did_loose;
char did_packed;
struct ref_array loose;
struct ref_array packed;
/* The submodule name, or "" for the main repo. */
char name[FLEX_ARRAY];
-} *cached_refs;
+} *ref_cache;
static struct ref_entry *current_ref;
@@ -158,36 +158,41 @@ static void free_ref_array(struct ref_array *array)
array->refs = NULL;
}
-static void clear_cached_refs(struct cached_refs *ca)
+static void clear_packed_ref_cache(struct ref_cache *refs)
{
- if (ca->did_loose)
- free_ref_array(&ca->loose);
- if (ca->did_packed)
- free_ref_array(&ca->packed);
- ca->did_loose = ca->did_packed = 0;
+ if (refs->did_packed)
+ free_ref_array(&refs->packed);
+ refs->did_packed = 0;
}
-static struct cached_refs *create_cached_refs(const char *submodule)
+static void clear_loose_ref_cache(struct ref_cache *refs)
+{
+ if (refs->did_loose)
+ free_ref_array(&refs->loose);
+ refs->did_loose = 0;
+}
+
+static struct ref_cache *create_ref_cache(const char *submodule)
{
int len;
- struct cached_refs *refs;
+ struct ref_cache *refs;
if (!submodule)
submodule = "";
len = strlen(submodule) + 1;
- refs = xcalloc(1, sizeof(struct cached_refs) + len);
+ refs = xcalloc(1, sizeof(struct ref_cache) + len);
memcpy(refs->name, submodule, len);
return refs;
}
/*
- * Return a pointer to a cached_refs for the specified submodule. For
+ * Return a pointer to a ref_cache for the specified submodule. For
* the main repository, use submodule==NULL. The returned structure
* will be allocated and initialized but not necessarily populated; it
* should not be freed.
*/
-static struct cached_refs *get_cached_refs(const char *submodule)
+static struct ref_cache *get_ref_cache(const char *submodule)
{
- struct cached_refs *refs = cached_refs;
+ struct ref_cache *refs = ref_cache;
if (!submodule)
submodule = "";
while (refs) {
@@ -196,19 +201,17 @@ static struct cached_refs *get_cached_refs(const char *submodule)
refs = refs->next;
}
- refs = create_cached_refs(submodule);
- refs->next = cached_refs;
- cached_refs = refs;
+ refs = create_ref_cache(submodule);
+ refs->next = ref_cache;
+ ref_cache = refs;
return refs;
}
-static void invalidate_cached_refs(void)
+void invalidate_ref_cache(const char *submodule)
{
- struct cached_refs *refs = cached_refs;
- while (refs) {
- clear_cached_refs(refs);
- refs = refs->next;
- }
+ struct ref_cache *refs = get_ref_cache(submodule);
+ clear_packed_ref_cache(refs);
+ clear_loose_ref_cache(refs);
}
static void read_packed_refs(FILE *f, struct ref_array *array)
@@ -257,7 +260,7 @@ void clear_extra_refs(void)
static struct ref_array *get_packed_refs(const char *submodule)
{
- struct cached_refs *refs = get_cached_refs(submodule);
+ struct ref_cache *refs = get_ref_cache(submodule);
if (!refs->did_packed) {
const char *packed_refs_file;
@@ -379,7 +382,7 @@ void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname)
static struct ref_array *get_loose_refs(const char *submodule)
{
- struct cached_refs *refs = get_cached_refs(submodule);
+ struct ref_cache *refs = get_ref_cache(submodule);
if (!refs->did_loose) {
get_ref_dir(submodule, "refs", &refs->loose);
@@ -1238,7 +1241,7 @@ int delete_ref(const char *refname, const unsigned char *sha1, int delopt)
ret |= repack_without_ref(refname);
unlink_or_warn(git_path("logs/%s", lock->ref_name));
- invalidate_cached_refs();
+ invalidate_ref_cache(NULL);
unlock_ref(lock);
return ret;
}
@@ -1529,7 +1532,7 @@ int write_ref_sha1(struct ref_lock *lock,
unlock_ref(lock);
return -1;
}
- invalidate_cached_refs();
+ clear_loose_ref_cache(get_ref_cache(NULL));
if (log_ref_write(lock->ref_name, lock->old_sha1, sha1, logmsg) < 0 ||
(strcmp(lock->ref_name, lock->orig_ref_name) &&
log_ref_write(lock->orig_ref_name, lock->old_sha1, sha1, logmsg) < 0)) {
diff --git a/refs.h b/refs.h
index 0229c57..f439c54 100644
--- a/refs.h
+++ b/refs.h
@@ -80,6 +80,14 @@ extern void unlock_ref(struct ref_lock *lock);
/** Writes sha1 into the ref specified by the lock. **/
extern int write_ref_sha1(struct ref_lock *lock, const unsigned char *sha1, const char *msg);
+/*
+ * Invalidate the reference cache for the specified submodule. Use
+ * submodule=NULL to invalidate the cache for the main module. This
+ * function must be called if references are changed via a mechanism
+ * other than the refs API.
+ */
+extern void invalidate_ref_cache(const char *submodule);
+
/** Setup reflog before using. **/
int log_ref_setup(const char *ref_name, char *logfile, int bufsize);