sha1_file.c: add a function to release all packs

On Windows, files that are in use cannot be removed or renamed. That
means that we have to release pack files when we are about to, say,
repack them. Let's introduce a convenient function to close all the
pack files and their idx files.

While at it, we consolidate the close windows/close fd/close index
stanza in `free_pack_by_name()` into the `close_pack()` function that
is used by the new `close_all_packs()` function to avoid repeated code.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/cache.h b/cache.h
index 4427945bc08be2d182b123ce5f684d23304582d9..c3a2bb8afff32b029d429b052b1c901dc4776811 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -1231,6 +1231,7 @@ extern void close_pack_index(struct packed_git *);
 
 extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
 extern void close_pack_windows(struct packed_git *);
+extern void close_all_packs(void);
 extern void unuse_pack(struct pack_window **);
 extern void free_pack_by_name(const char *);
 extern void clear_delta_base_cache(void);

diff --git a/sha1_file.c b/sha1_file.c
index 18922b435ebd82f95b495a40b76c4ceb15416dc0..d215e0c9bf0fdf0a7a28233ddccd87ba0c51fd68 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -765,6 +765,25 @@ static int close_pack_fd(struct packed_git *p)
        return 1;
 }
 
+static void close_pack(struct packed_git *p)
+{
+       close_pack_windows(p);
+       close_pack_fd(p);
+       close_pack_index(p);
+}
+
+void close_all_packs(void)
+{
+       struct packed_git *p;
+
+       for (p = packed_git; p; p = p->next)
+               if (p->do_not_close)
+                       die("BUG! Want to close pack marked 'do-not-close'");
+               else
+                       close_pack(p);
+}
+
+
 /*
  * The LRU pack is the one with the oldest MRU window, preferring packs
  * with no used windows, or the oldest mtime if it has no windows allocated.
@@ -873,9 +892,7 @@ void free_pack_by_name(const char *pack_name)
                p = *pp;
                if (strcmp(pack_name, p->pack_name) == 0) {
                        clear_delta_base_cache();
-                       close_pack_windows(p);
-                       close_pack_fd(p);
-                       close_pack_index(p);
+                       close_pack(p);
                        free(p->bad_object_sha1);
                        *pp = p->next;
                        if (last_found_pack == p)