thodg/libgit2/src/git2/odb_backend.h

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• Hash : d4b5a4e2
  Author :
  Date : 2011-02-09T19:49:02
  

  Internal changes on the backend system The priority value for different backends has been removed from the public `git_odb_backend` struct. We handle that internally. The priority value is specified on the `git_odb_add_alternate`. This is convenient because it allows us to poll a backend twice with different priorities without having to instantiate it twice. We also differentiate between main backends and alternates; alternates have lower priority and cannot be written to. These changes come with some unit tests to make sure that the backend sorting is consistent. The libgit2 version has been bumped to 0.4.0. This commit changes the external API: CHANGED: struct git_odb_backend No longer has a `priority` attribute; priority for the backend in managed internally by the library. git_odb_add_backend(git_odb *odb, git_odb_backend *backend, int priority) Now takes an additional priority parameter, the priority that will be given to the backend. ADDED: git_odb_add_alternate(git_odb *odb, git_odb_backend *backend, int priority) Add a backend as an alternate. Alternate backends have always lower priority than main backends, and writing is disabled on them. Signed-off-by: Vicent Marti <tanoku@gmail.com> Signed-off-by: Vicent Marti <tanoku@gmail.com>

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• src/git2/odb_backend.h

• /*
   * This file is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License, version 2,
   * as published by the Free Software Foundation.
   *
   * In addition to the permissions in the GNU General Public License,
   * the authors give you unlimited permission to link the compiled
   * version of this file into combinations with other programs,
   * and to distribute those combinations without any restriction
   * coming from the use of this file.  (The General Public License
   * restrictions do apply in other respects; for example, they cover
   * modification of the file, and distribution when not linked into
   * a combined executable.)
   *
   * This file is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; see the file COPYING.  If not, write to
   * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
   * Boston, MA 02110-1301, USA.
   */
  #ifndef INCLUDE_git_odb_backend_h__
  #define INCLUDE_git_odb_backend_h__
  
  #include "common.h"
  #include "types.h"
  #include "oid.h"
  
  /**
   * @file git2/backend.h
   * @brief Git custom backend functions
   * @defgroup git_backend Git custom backend API
   * @ingroup Git
   * @{
   */
  GIT_BEGIN_DECL
  
  /** An instance for a custom backend */
  struct git_odb_backend {
  	git_odb *odb;
  
  	int (* read)(
  			git_rawobj *,
  			struct git_odb_backend *,
  			const git_oid *);
  
  	int (* read_header)(
  			git_rawobj *,
  			struct git_odb_backend *,
  			const git_oid *);
  
  	int (* write)(
  			git_oid *id,
  			struct git_odb_backend *,
  			git_rawobj *obj);
  
  	int (* exists)(
  			struct git_odb_backend *,
  			const git_oid *);
  
  	void (* free)(struct git_odb_backend *);
  };
  
  GIT_EXTERN(int) git_odb_backend_pack(git_odb_backend **backend_out, const char *objects_dir);
  GIT_EXTERN(int) git_odb_backend_loose(git_odb_backend **backend_out, const char *objects_dir);
  
  #ifdef GIT2_SQLITE_BACKEND
  GIT_EXTERN(int) git_odb_backend_sqlite(git_odb_backend **backend_out, const char *sqlite_db);
  #endif
  
  GIT_END_DECL
  
  #endif
  

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