src/pack-objects.h

   1 /*
   2  * Copyright (C) 2009-2012 the libgit2 contributors
   3  *
   4  * This file is part of libgit2, distributed under the GNU GPL v2 with
   5  * a Linking Exception. For full terms see the included COPYING file.
   6  */
   7
   8 #ifndef INCLUDE_pack_objects_h__
   9 #define INCLUDE_pack_objects_h__
  10
  11 #include "common.h"
  12
  13 #include "buffer.h"
  14 #include "hash.h"
  15 #include "oidmap.h"
  16 #include "netops.h"
  17
  18 #include "git2/oid.h"
  19
  20 #define GIT_PACK_WINDOW 10 /* number of objects to possibly delta against */
  21 #define GIT_PACK_DEPTH 50 /* max delta depth */
  22 #define GIT_PACK_DELTA_CACHE_SIZE (256 * 1024 * 1024)
  23 #define GIT_PACK_DELTA_CACHE_LIMIT 1000
  24 #define GIT_PACK_BIG_FILE_THRESHOLD (512 * 1024 * 1024)
  25
  26 typedef struct git_pobject {
  27         git_oid id;
  28         git_otype type;
  29         git_off_t offset;
  30
  31         size_t size;
  32
  33         unsigned int hash; /* name hint hash */
  34
  35         struct git_pobject *delta; /* delta base object */
  36         struct git_pobject *delta_child; /* deltified objects who bases me */
  37         struct git_pobject *delta_sibling; /* other deltified objects
  38                                             * who uses the same base as
  39                                             * me */
  40
  41         void *delta_data;
  42         unsigned long delta_size;
  43         unsigned long z_delta_size;
  44
  45         int written:1,
  46             recursing:1,
  47             tagged:1,
  48             filled:1;
  49 } git_pobject;
  50
  51 struct git_packbuilder {
  52         git_repository *repo; /* associated repository */
  53         git_odb *odb; /* associated object database */
  54
  55         git_hash_ctx ctx;
  56
  57         uint32_t nr_objects,
  58                  nr_alloc,
  59                  nr_written,
  60                  nr_remaining;
  61
  62         git_pobject *object_list;
  63
  64         git_oidmap *object_ix;
  65
  66         git_oid pack_oid; /* hash of written pack */
  67
  68         /* synchronization objects */
  69         git_mutex cache_mutex;
  70         git_mutex progress_mutex;
  71         git_cond progress_cond;
  72
  73         /* configs */
  74         unsigned long delta_cache_size;
  75         unsigned long max_delta_cache_size;
  76         unsigned long cache_max_small_delta_size;
  77         unsigned long big_file_threshold;
  78         unsigned long window_memory_limit;
  79
  80         int nr_threads; /* nr of threads to use */
  81
  82         bool done;
  83 };
  84
  85 int git_packbuilder_send(git_packbuilder *pb, gitno_socket *s);
  86 int git_packbuilder_write_buf(git_buf *buf, git_packbuilder *pb);
  87
  88 #endif /* INCLUDE_pack_objects_h__ */