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