Diff options
| author | Bryce Kwon <bryce@brycekwon.com> | |
|---|---|---|
| committer | Bryce Kwon <bryce@brycekwon.com> | |
| commit | ||
| parent | ||
| tree | ||
| download | ||
Share one lock-file helper between the caches
Diffstat (limited to 'source/cache.h')
| -rw-r--r-- | source/cache.h | 10 |
1 file changed, 10 insertions, 0 deletions
diff --git a/source/cache.h b/source/cache.h index b73a6f4..cfe1fbf 100644 --- a/source/cache.h +++ b/source/cache.h @@ -40,4 +40,14 @@ extern int cache_abandon_fill(void); extern unsigned long cache_hash_str(const char *str); +/* + * Open the lock file at path, creating it if need be, then lock it without + * waiting and empty it, leaving the descriptor in *fd. The lock holds until + * the last descriptor on the file closes, and the caller renames or removes + * the file before that. Returns 0, EAGAIN or EWOULDBLOCK when another process + * holds the lock or has renamed the file away, or the errno of the step that + * failed, which has been logged. *fd is -1 on failure. + */ +extern int cache_lock_file(const char *path, int *fd); + #endif // CGIT_CACHE_H |