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
  20 #include "git2/oid.h"
  21 #include "git2/pack.h"
  22
  23 #define GIT_PACK_WINDOW 10 /* number of objects to possibly delta against */
  24 #define GIT_PACK_DEPTH 50 /* max delta depth */
  25 #define GIT_PACK_DELTA_CACHE_SIZE (256 * 1024 * 1024)
  26 #define GIT_PACK_DELTA_CACHE_LIMIT 1000
  27 #define GIT_PACK_BIG_FILE_THRESHOLD (512 * 1024 * 1024)
  28
  29 typedef struct git_pobject {
  30         git_oid id;
  31         git_otype type;
  32         git_off_t offset;
  33
  34         size_t size;
  35
  36         unsigned int hash; /* name hint hash */
  37
  38         struct git_pobject *delta; /* delta base object */
  39         struct git_pobject *delta_child; /* deltified objects who bases me */
  40         struct git_pobject *delta_sibling; /* other deltified objects
  41                                             * who uses the same base as
  42                                             * me */
  43
  44         void *delta_data;
  45         unsigned long delta_size;
  46         unsigned long z_delta_size;
  47
  48         int written:1,
  49             recursing:1,
  50             tagged:1,
  51             filled:1;
  52 } git_pobject;
  53
  54 typedef struct {
  55         git_oid id;
  56         unsigned int uninteresting:1,
  57                 seen:1;
  58 } git_walk_object;
  59
  60 struct git_packbuilder {
  61         git_repository *repo; /* associated repository */
  62         git_odb *odb; /* associated object database */
  63
  64         git_hash_ctx ctx;
  65         git_zstream zstream;
  66
  67         uint32_t nr_objects,
  68                  nr_alloc,
  69                  nr_written,
  70                  nr_remaining;
  71
  72         git_pobject *object_list;
  73
  74         git_oidmap *object_ix;
  75
  76         git_oidmap *walk_objects;
  77         git_pool object_pool;
  78
  79         git_oid pack_oid; /* hash of written pack */
  80
  81         /* synchronization objects */
  82         git_mutex cache_mutex;
  83         git_mutex progress_mutex;
  84         git_cond progress_cond;
  85
  86         /* configs */
  87         uint64_t delta_cache_size;
  88         uint64_t max_delta_cache_size;
  89         uint64_t cache_max_small_delta_size;
  90         uint64_t big_file_threshold;
  91         uint64_t window_memory_limit;
  92
  93         int nr_threads; /* nr of threads to use */
  94
  95         git_packbuilder_progress progress_cb;
  96         void *progress_cb_payload;
  97         double last_progress_report_time; /* the time progress was last reported */
  98
  99         bool done;
 100 };
 101
 102 int git_packbuilder_write_buf(git_buf *buf, git_packbuilder *pb);
 103
 104 #endif /* INCLUDE_pack_objects_h__ */