src/libgit2/mwindow.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_mwindow__
   9 #define INCLUDE_mwindow__
  10
  11 #include "common.h"
  12
  13 #include "map.h"
  14 #include "vector.h"
  15
  16 typedef struct git_mwindow {
  17         struct git_mwindow *next;
  18         git_map window_map;
  19         off64_t offset;
  20         size_t last_used;
  21         size_t inuse_cnt;
  22 } git_mwindow;
  23
  24 typedef struct git_mwindow_file {
  25         git_mutex lock; /* protects updates to fd */
  26         git_mwindow *windows;
  27         int fd;
  28         off64_t size;
  29 } git_mwindow_file;
  30
  31 typedef struct git_mwindow_ctl {
  32         size_t mapped;
  33         unsigned int open_windows;
  34         unsigned int mmap_calls;
  35         unsigned int peak_open_windows;
  36         size_t peak_mapped;
  37         size_t used_ctr;
  38         git_vector windowfiles;
  39 } git_mwindow_ctl;
  40
  41 int git_mwindow_contains(git_mwindow *win, off64_t offset, off64_t extra);
  42 int git_mwindow_free_all(git_mwindow_file *mwf); /* locks */
  43 unsigned char *git_mwindow_open(git_mwindow_file *mwf, git_mwindow **cursor, off64_t offset, size_t extra, unsigned int *left);
  44 int git_mwindow_file_register(git_mwindow_file *mwf);
  45 void git_mwindow_file_deregister(git_mwindow_file *mwf);
  46 void git_mwindow_close(git_mwindow **w_cursor);
  47
  48 extern int git_mwindow_global_init(void);
  49
  50 struct git_pack_file; /* just declaration to avoid cyclical includes */
  51 int git_mwindow_get_pack(struct git_pack_file **out, const char *path);
  52 int git_mwindow_put_pack(struct git_pack_file *pack);
  53
  54 #endif