src/pack-objects.h

   1 /*
   2  * Copyright (C) the libgit2 contributors. All rights reserved.
   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 #include "zstream.h"
  18 #include "pool.h"
  19 #include "indexer.h"
  20
  21 #include "git2/oid.h"
  22 #include "git2/pack.h"
  23
  24 #define GIT_PACK_WINDOW 10 /* number of objects to possibly delta against */
  25 #define GIT_PACK_DEPTH 50 /* max delta depth */
  26 #define GIT_PACK_DELTA_CACHE_SIZE (256 * 1024 * 1024)
  27 #define GIT_PACK_DELTA_CACHE_LIMIT 1000
  28 #define GIT_PACK_BIG_FILE_THRESHOLD (512 * 1024 * 1024)
  29
  30 typedef struct git_pobject {
  31         git_oid id;
  32         git_object_t type;
  33         off64_t offset;
  34
  35         size_t size;
  36
  37         unsigned int hash; /* name hint hash */
  38
  39         struct git_pobject *delta; /* delta base object */
  40         struct git_pobject *delta_child; /* deltified objects who bases me */
  41         struct git_pobject *delta_sibling; /* other deltified objects
  42                                             * who uses the same base as
  43                                             * me */
  44
  45         void *delta_data;
  46         size_t delta_size;
  47         size_t z_delta_size;
  48
  49         int written:1,
  50             recursing:1,
  51             tagged:1,
  52             filled:1;
  53 } git_pobject;
  54
  55 struct git_packbuilder {
  56         git_repository *repo; /* associated repository */
  57         git_odb *odb; /* associated object database */
  58
  59         git_hash_ctx ctx;
  60         git_zstream zstream;
  61
  62         uint32_t nr_objects,
  63                 nr_deltified,
  64                 nr_written,
  65                 nr_remaining;
  66
  67         size_t nr_alloc;
  68
  69         git_pobject *object_list;
  70
  71         git_oidmap *object_ix;
  72
  73         git_oidmap *walk_objects;
  74         git_pool object_pool;
  75
  76         git_oid pack_oid; /* hash of written pack */
  77
  78         /* synchronization objects */
  79         git_mutex cache_mutex;
  80         git_mutex progress_mutex;
  81         git_cond progress_cond;
  82
  83         /* configs */
  84         size_t delta_cache_size;
  85         size_t max_delta_cache_size;
  86         size_t cache_max_small_delta_size;
  87         size_t big_file_threshold;
  88         size_t window_memory_limit;
  89
  90         unsigned int nr_threads; /* nr of threads to use */
  91
  92         git_packbuilder_progress progress_cb;
  93         void *progress_cb_payload;
  94         double last_progress_report_time; /* the time progress was last reported */
  95
  96         bool done;
  97 };
  98
  99 int git_packbuilder_write_buf(git_buf *buf, git_packbuilder *pb);
 100
 101 #endif