Since the tempfile code recently relaxed the rule that
tempfile structs (and thus locks) need to hang around
forever, we no longer have to leak our lock_file structs.
In fact, we don't even need to heap-allocate them anymore,
since their lifetime can just match that of the surrounding
ref_lock (and if we forget to delete a lock, the effect is
the same as before: it will eventually go away at program
exit).
Note that there is a check in unlock_ref() to only rollback
a lock file if it has been allocated. We don't need that
check anymore; we zero the ref_lock (and thus the
lock_file), so at worst we pass a NULL pointer to
delete_tempfile(), which considers that a noop.
Signed-off-by: Jeff King <peff@xxxxxxxx>
---
refs/files-backend.c | 39 ++++++++++++++++-----------------------
1 file changed, 16 insertions(+), 23 deletions(-)
diff --git a/refs/files-backend.c b/refs/files-backend.c
index 36fe8a986b..f3455609d6 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -12,7 +12,7 @@
struct ref_lock {
char *ref_name;
- struct lock_file *lk;
+ struct lock_file lk;
struct object_id old_oid;
};
@@ -418,9 +418,7 @@ static int files_read_raw_ref(struct ref_store *ref_store,
static void unlock_ref(struct ref_lock *lock)
{
- /* Do not free lock->lk -- atexit() still looks at them */
- if (lock->lk)
- rollback_lock_file(lock->lk);
+ rollback_lock_file(&lock->lk);
free(lock->ref_name);
free(lock);
}
@@ -534,11 +532,8 @@ static int lock_raw_ref(struct files_ref_store *refs,
goto error_return;
}
- if (!lock->lk)
- lock->lk = xcalloc(1, sizeof(struct lock_file));
-
if (hold_lock_file_for_update_timeout(
- lock->lk, ref_file.buf, LOCK_NO_DEREF,
+ &lock->lk, ref_file.buf, LOCK_NO_DEREF,
get_files_ref_lock_timeout_ms()) < 0) {
if (errno == ENOENT && --attempts_remaining > 0) {
/*
@@ -949,11 +944,9 @@ static struct ref_lock *lock_ref_sha1_basic(struct files_ref_store *refs,
goto error_return;
}
- lock->lk = xcalloc(1, sizeof(struct lock_file));
-
lock->ref_name = xstrdup(refname);
- if (raceproof_create_file(ref_file.buf, create_reflock, lock->lk)) {
+ if (raceproof_create_file(ref_file.buf, create_reflock, &lock->lk)) {
last_errno = errno;
unable_to_lock_message(ref_file.buf, errno, err);
goto error_return;
@@ -1404,14 +1397,14 @@ static int files_rename_ref(struct ref_store *ref_store,
static int close_ref_gently(struct ref_lock *lock)
{
- if (close_lock_file_gently(lock->lk))
+ if (close_lock_file_gently(&lock->lk))
return -1;
return 0;
}
static int commit_ref(struct ref_lock *lock)
{
- char *path = get_locked_file_path(lock->lk);
+ char *path = get_locked_file_path(&lock->lk);
struct stat st;
if (!lstat(path, &st) && S_ISDIR(st.st_mode)) {
@@ -1435,7 +1428,7 @@ static int commit_ref(struct ref_lock *lock)
free(path);
}
- if (commit_lock_file(lock->lk))
+ if (commit_lock_file(&lock->lk))
return -1;
return 0;
}
@@ -1627,12 +1620,12 @@ static int write_ref_to_lockfile(struct ref_lock *lock,
unlock_ref(lock);
return -1;
}
- fd = get_lock_file_fd(lock->lk);
+ fd = get_lock_file_fd(&lock->lk);
if (write_in_full(fd, oid_to_hex(oid), GIT_SHA1_HEXSZ) != GIT_SHA1_HEXSZ ||
write_in_full(fd, &term, 1) != 1 ||
close_ref_gently(lock) < 0) {
strbuf_addf(err,
- "couldn't write '%s'", get_lock_file_path(lock->lk));
+ "couldn't write '%s'", get_lock_file_path(&lock->lk));
unlock_ref(lock);
return -1;
}
@@ -1709,7 +1702,7 @@ static int create_ref_symlink(struct ref_lock *lock, const char *target)
{
int ret = -1;
#ifndef NO_SYMLINK_HEAD
- char *ref_path = get_locked_file_path(lock->lk);
+ char *ref_path = get_locked_file_path(&lock->lk);
unlink(ref_path);
ret = symlink(target, ref_path);
free(ref_path);
@@ -1745,14 +1738,14 @@ static int create_symref_locked(struct files_ref_store *refs,
return 0;
}
- if (!fdopen_lock_file(lock->lk, "w"))
+ if (!fdopen_lock_file(&lock->lk, "w"))
return error("unable to fdopen %s: %s",
- lock->lk->tempfile->filename.buf, strerror(errno));
+ lock->lk.tempfile->filename.buf, strerror(errno));
update_symref_reflog(refs, lock, refname, target, logmsg);
/* no error check; commit_ref will check ferror */
- fprintf(lock->lk->tempfile->fp, "ref: %s\n", target);
+ fprintf(lock->lk.tempfile->fp, "ref: %s\n", target);
if (commit_ref(lock) < 0)
return error("unable to write symref for %s: %s", refname,
strerror(errno));
@@ -2853,12 +2846,12 @@ static int files_reflog_expire(struct ref_store *ref_store,
strerror(errno));
rollback_lock_file(&reflog_lock);
} else if (update &&
- (write_in_full(get_lock_file_fd(lock->lk),
+ (write_in_full(get_lock_file_fd(&lock->lk),
oid_to_hex(&cb.last_kept_oid), GIT_SHA1_HEXSZ) != GIT_SHA1_HEXSZ ||
- write_str_in_full(get_lock_file_fd(lock->lk), "\n") != 1 ||
+ write_str_in_full(get_lock_file_fd(&lock->lk), "\n") != 1 ||
close_ref_gently(lock) < 0)) {
status |= error("couldn't write %s",
- get_lock_file_path(lock->lk));
+ get_lock_file_path(&lock->lk));
rollback_lock_file(&reflog_lock);
} else if (commit_lock_file(&reflog_lock)) {
status |= error("unable to write reflog '%s' (%s)",
--
2.14.1.721.gc5bc1565f1
