1 file changed, 11 insertions, 1 deletion
diff --git a/source/cache.h b/source/cache.h
index d3a7ec4..cfe1fbf 100644
--- a/source/cache.h
+++ b/source/cache.h
@@ -27,7 +27,7 @@ extern int cache_process(int size, const char *path, const char *key, int ttl,
  * Write one line per cache slot to stdout, giving its path, modification time,
  * size and key.
  */
-extern int cache_ls(const char *path);
+extern void cache_ls(const char *path);
 
 /*
  * Give up on the slot being filled and put stdout back on the client, after
@@ -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