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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:47:53 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:47:53 +0000
commitc8bae7493d2f2910b57f13ded012e86bdcfb0532 (patch)
tree24e09d9f84dec336720cf393e156089ca2835791 /replace-object.h
parentInitial commit. (diff)
downloadgit-c8bae7493d2f2910b57f13ded012e86bdcfb0532.tar.xz
git-c8bae7493d2f2910b57f13ded012e86bdcfb0532.zip
Adding upstream version 1:2.39.2.upstream/1%2.39.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'replace-object.h')
-rw-r--r--replace-object.h43
1 files changed, 43 insertions, 0 deletions
diff --git a/replace-object.h b/replace-object.h
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index 0000000..3fbc32e
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+++ b/replace-object.h
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+#ifndef REPLACE_OBJECT_H
+#define REPLACE_OBJECT_H
+
+#include "oidmap.h"
+#include "repository.h"
+#include "object-store.h"
+
+struct replace_object {
+ struct oidmap_entry original;
+ struct object_id replacement;
+};
+
+void prepare_replace_object(struct repository *r);
+
+/*
+ * This internal function is only declared here for the benefit of
+ * lookup_replace_object(). Please do not call it directly.
+ */
+const struct object_id *do_lookup_replace_object(struct repository *r,
+ const struct object_id *oid);
+
+/*
+ * If object sha1 should be replaced, return the replacement object's
+ * name (replaced recursively, if necessary). The return value is
+ * either sha1 or a pointer to a permanently-allocated value. When
+ * object replacement is suppressed, always return sha1.
+ *
+ * Note: some thread debuggers might point a data race on the
+ * replace_map_initialized reading in this function. However, we know there's no
+ * problem in the value being updated by one thread right after another one read
+ * it here (and it should be written to only once, anyway).
+ */
+static inline const struct object_id *lookup_replace_object(struct repository *r,
+ const struct object_id *oid)
+{
+ if (!read_replace_refs ||
+ (r->objects->replace_map_initialized &&
+ r->objects->replace_map->map.tablesize == 0))
+ return oid;
+ return do_lookup_replace_object(r, oid);
+}
+
+#endif /* REPLACE_OBJECT_H */