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https://github.com/git/git
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d3ff6f5501
Every single user actually wanted this only for commit objects, and we have no reason to waste space on it for other object types. So just move the structure member from the low-level "struct object" into the "struct commit". This leaves the commit object the same size, and removes one unnecessary pointer from all other object allocations. This shrinks memory usage (still at a fairly hefty half-gig, admittedly) of "git-rev-list --all --objects" on the mozilla repo by another 5% in my tests. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
#ifndef OBJECT_H
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#define OBJECT_H
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struct object_list {
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struct object *item;
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struct object_list *next;
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const char *name;
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};
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struct object_refs {
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unsigned count;
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struct object *ref[FLEX_ARRAY]; /* more */
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};
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#define TYPE_BITS 3
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#define FLAG_BITS 27
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#define TYPE_NONE 0
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#define TYPE_BLOB 1
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#define TYPE_TREE 2
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#define TYPE_COMMIT 3
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#define TYPE_TAG 4
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#define TYPE_BAD 5
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struct object {
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unsigned parsed : 1;
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unsigned used : 1;
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unsigned type : TYPE_BITS;
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unsigned flags : FLAG_BITS;
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unsigned char sha1[20];
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struct object_refs *refs;
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};
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extern int track_object_refs;
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extern int obj_allocs;
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extern struct object **objs;
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extern const char *type_names[];
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static inline const char *typename(unsigned int type)
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{
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return type_names[type > TYPE_TAG ? TYPE_BAD : type];
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}
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/** Internal only **/
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struct object *lookup_object(const unsigned char *sha1);
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/** Returns the object, having looked it up as being the given type. **/
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struct object *lookup_object_type(const unsigned char *sha1, const char *type);
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void created_object(const unsigned char *sha1, struct object *obj);
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/** Returns the object, having parsed it to find out what it is. **/
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struct object *parse_object(const unsigned char *sha1);
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/** Returns the object, with potentially excess memory allocated. **/
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struct object *lookup_unknown_object(const unsigned char *sha1);
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struct object_refs *alloc_object_refs(unsigned count);
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void set_object_refs(struct object *obj, struct object_refs *refs);
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void mark_reachable(struct object *obj, unsigned int mask);
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struct object_list *object_list_insert(struct object *item,
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struct object_list **list_p);
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void object_list_append(struct object *item,
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struct object_list **list_p);
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unsigned object_list_length(struct object_list *list);
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int object_list_contains(struct object_list *list, struct object *obj);
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#endif /* OBJECT_H */
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