thodg/libgit2/src/repository.h

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• Hash : 6b2a1941
  Author :
  Date : 2011-03-12T23:09:16
  

  Fix the retarded object interdependency system
  
  It's no longer retarded. All object interdependencies are stored as OIDs
  instead of actual objects. This should be hundreds of times faster,
  specially on big repositories. Heck, who knows, maye it doesn't even
  segfault -- wouldn't that be awesome?
  
  What has changed on the API?
  
  	`git_commit_parent`, `git_commit_tree`, `git_tag_target` now return
  	their values through a pointer-to-pointer, and have an error code.
  
  	`git_commit_set_tree` and `git_tag_set_target` now return an error
  	code and may fail.
  
  	`git_repository_free__no_gc` has been deprecated because it's
  	stupid. Since there are no longer any interdependencies between
  	objects, we don't need internal reference counting, and GC
  	never fails or double-free's pointers.
  
  	`git_object_close` now does a very sane thing: marks an object
  	as unused. Closed objects will be eventually free'd from the
  	object cache based on LRU. Please use `git_object_close` from
  	the garbage collector `destroy` method on your bindings. It's
  	100% safe.
  
  	`git_repository_gc` is a new method that forces a garbage collector
  	pass through the repo, to free as many LRU objects as possible.
  	This is useful if we are running out of memory.
  

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• src/repository.h

• #ifndef INCLUDE_repository_h__
  #define INCLUDE_repository_h__
  
  #include "git2/common.h"
  #include "git2/oid.h"
  #include "git2/odb.h"
  #include "git2/repository.h"
  #include "git2/object.h"
  
  #include "hashtable.h"
  #include "index.h"
  #include "refs.h"
  
  #define DOT_GIT ".git"
  #define GIT_DIR DOT_GIT "/"
  #define GIT_OBJECTS_DIR "objects/"
  #define GIT_INDEX_FILE "index"
  
  typedef struct {
  	git_rawobj raw;
  	void *write_ptr;
  	size_t written_bytes;
  	int open:1;
  } git_odb_source;
  
  struct git_object {
  	git_oid id;
  	git_repository *repo;
  	git_odb_source source;
  	unsigned int lru;
  	unsigned char in_memory, modified, can_free, _pad;
  };
  
  struct git_repository {
  	git_odb *db;
  	git_index *index;
  
  	git_hashtable *objects;
  	git_vector memory_objects;
  
  	git_refcache references;
  
  	char *path_repository;
  	char *path_index;
  	char *path_odb;
  	char *path_workdir;
  
  	unsigned is_bare:1;
  	unsigned int lru_counter;
  };
  
  int git_object__source_open(git_object *object);
  void git_object__source_close(git_object *object);
  
  /* fully free the object; internal method, do not
   * export */
  void git_object__free(git_object *object);
  
  int git__source_printf(git_odb_source *source, const char *format, ...);
  int git__source_write(git_odb_source *source, const void *bytes, size_t len);
  
  int git__parse_oid(git_oid *oid, char **buffer_out, const char *buffer_end, const char *header);
  int git__write_oid(git_odb_source *src, const char *header, const git_oid *oid);
  
  #endif
  

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