refs file backend: move raceproof_create_file() here

Move the raceproof_create_file() API added to cache.h and
object-file.c in 177978f56ad (raceproof_create_file(): new function,
2017-01-06) to its only user, refs/files-backend.c.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 0 insertions, 68 deletions

diff --git a/object-file.c b/object-file.c
index ecca5a8da0..231a02997b 100644
--- a/object-file.c
+++ b/object-file.c
@@ -414,74 +414,6 @@ enum scld_error safe_create_leading_directories_const(const char *path)
 	return result;
 }
 
-int raceproof_create_file(const char *path, create_file_fn fn, void *cb)
-{
-	/*
-	 * The number of times we will try to remove empty directories
-	 * in the way of path. This is only 1 because if another
-	 * process is racily creating directories that conflict with
-	 * us, we don't want to fight against them.
-	 */
-	int remove_directories_remaining = 1;
-
-	/*
-	 * The number of times that we will try to create the
-	 * directories containing path. We are willing to attempt this
-	 * more than once, because another process could be trying to
-	 * clean up empty directories at the same time as we are
-	 * trying to create them.
-	 */
-	int create_directories_remaining = 3;
-
-	/* A scratch copy of path, filled lazily if we need it: */
-	struct strbuf path_copy = STRBUF_INIT;
-
-	int ret, save_errno;
-
-	/* Sanity check: */
-	assert(*path);
-
-retry_fn:
-	ret = fn(path, cb);
-	save_errno = errno;
-	if (!ret)
-		goto out;
-
-	if (errno == EISDIR && remove_directories_remaining-- > 0) {
-		/*
-		 * A directory is in the way. Maybe it is empty; try
-		 * to remove it:
-		 */
-		if (!path_copy.len)
-			strbuf_addstr(&path_copy, path);
-
-		if (!remove_dir_recursively(&path_copy, REMOVE_DIR_EMPTY_ONLY))
-			goto retry_fn;
-	} else if (errno == ENOENT && create_directories_remaining-- > 0) {
-		/*
-		 * Maybe the containing directory didn't exist, or
-		 * maybe it was just deleted by a process that is
-		 * racing with us to clean up empty directories. Try
-		 * to create it:
-		 */
-		enum scld_error scld_result;
-
-		if (!path_copy.len)
-			strbuf_addstr(&path_copy, path);
-
-		do {
-			scld_result = safe_create_leading_directories(path_copy.buf);
-			if (scld_result == SCLD_OK)
-				goto retry_fn;
-		} while (scld_result == SCLD_VANISHED && create_directories_remaining-- > 0);
-	}
-
-out:
-	strbuf_release(&path_copy);
-	errno = save_errno;
-	return ret;
-}
-
 static void fill_loose_path(struct strbuf *buf, const struct object_id *oid)
 {
 	int i;