pack: move release_pack_memory()

The function unuse_one_window() needs to be temporarily made global. Its
scope will be restored to static in a subsequent commit.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-compat-util.h

@@ -749,8 +749,6 @@ const char *inet_ntop(int af, const void *src, char *dst, size_t size);
 extern int git_atexit(void (*handler)(void));
 #endif
 
-extern void release_pack_memory(size_t);
-
 typedef void (*try_to_free_t)(size_t);
 extern try_to_free_t set_try_to_free_routine(try_to_free_t);
 

packfile.c

@@ -208,3 +208,52 @@ struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path)
 
 	return p;
 }
+
+static void scan_windows(struct packed_git *p,
+	struct packed_git **lru_p,
+	struct pack_window **lru_w,
+	struct pack_window **lru_l)
+{
+	struct pack_window *w, *w_l;
+
+	for (w_l = NULL, w = p->windows; w; w = w->next) {
+		if (!w->inuse_cnt) {
+			if (!*lru_w || w->last_used < (*lru_w)->last_used) {
+				*lru_p = p;
+				*lru_w = w;
+				*lru_l = w_l;
+			}
+		}
+		w_l = w;
+	}
+}
+
+int unuse_one_window(struct packed_git *current)
+{
+	struct packed_git *p, *lru_p = NULL;
+	struct pack_window *lru_w = NULL, *lru_l = NULL;
+
+	if (current)
+		scan_windows(current, &lru_p, &lru_w, &lru_l);
+	for (p = packed_git; p; p = p->next)
+		scan_windows(p, &lru_p, &lru_w, &lru_l);
+	if (lru_p) {
+		munmap(lru_w->base, lru_w->len);
+		pack_mapped -= lru_w->len;
+		if (lru_l)
+			lru_l->next = lru_w->next;
+		else
+			lru_p->windows = lru_w->next;
+		free(lru_w);
+		pack_open_windows--;
+		return 1;
+	}
+	return 0;
+}
+
+void release_pack_memory(size_t need)
+{
+	size_t cur = pack_mapped;
+	while (need >= (cur - pack_mapped) && unuse_one_window(NULL))
+		; /* nothing */
+}

packfile.h

@@ -43,4 +43,8 @@ extern void pack_report(void);
  */
 extern int open_pack_index(struct packed_git *);
 
+extern int unuse_one_window(struct packed_git *current);
+
+extern void release_pack_memory(size_t);
+
 #endif

sha1_file.c

@@ -681,55 +681,6 @@ static int has_loose_object(const unsigned char *sha1)
 	return check_and_freshen(sha1, 0);
 }
 
-static void scan_windows(struct packed_git *p,
-	struct packed_git **lru_p,
-	struct pack_window **lru_w,
-	struct pack_window **lru_l)
-{
-	struct pack_window *w, *w_l;
-
-	for (w_l = NULL, w = p->windows; w; w = w->next) {
-		if (!w->inuse_cnt) {
-			if (!*lru_w || w->last_used < (*lru_w)->last_used) {
-				*lru_p = p;
-				*lru_w = w;
-				*lru_l = w_l;
-			}
-		}
-		w_l = w;
-	}
-}
-
-static int unuse_one_window(struct packed_git *current)
-{
-	struct packed_git *p, *lru_p = NULL;
-	struct pack_window *lru_w = NULL, *lru_l = NULL;
-
-	if (current)
-		scan_windows(current, &lru_p, &lru_w, &lru_l);
-	for (p = packed_git; p; p = p->next)
-		scan_windows(p, &lru_p, &lru_w, &lru_l);
-	if (lru_p) {
-		munmap(lru_w->base, lru_w->len);
-		pack_mapped -= lru_w->len;
-		if (lru_l)
-			lru_l->next = lru_w->next;
-		else
-			lru_p->windows = lru_w->next;
-		free(lru_w);
-		pack_open_windows--;
-		return 1;
-	}
-	return 0;
-}
-
-void release_pack_memory(size_t need)
-{
-	size_t cur = pack_mapped;
-	while (need >= (cur - pack_mapped) && unuse_one_window(NULL))
-		; /* nothing */
-}
-
 static void mmap_limit_check(size_t length)
 {
 	static size_t limit = 0;