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/*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2,
* as published by the Free Software Foundation.
*
* In addition to the permissions in the GNU General Public License,
* the authors give you unlimited permission to link the compiled
* version of this file into combinations with other programs,
* and to distribute those combinations without any restriction
* coming from the use of this file. (The General Public License
* restrictions do apply in other respects; for example, they cover
* modification of the file, and distribution when not linked into
* a combined executable.)
*
* This file is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDE_mwindow__
#define INCLUDE_mwindow__
#include "map.h"
#include "vector.h"
#include "fileops.h"
typedef struct git_mwindow {
struct git_mwindow *next;
git_map window_map;
off_t offset;
unsigned int last_used;
unsigned int inuse_cnt;
} git_mwindow;
typedef struct git_mwindow_file {
git_mwindow *windows;
int fd;
off_t size;
} git_mwindow_file;
typedef struct git_mwindow_ctl {
size_t mapped;
unsigned int open_windows;
size_t window_size; /* needs default value */
size_t mapped_limit; /* needs default value */
unsigned int mmap_calls;
unsigned int peak_open_windows;
size_t peak_mapped;
size_t used_ctr;
git_vector windowfiles;
} git_mwindow_ctl;
int git_mwindow_contains(git_mwindow *win, off_t offset);
void git_mwindow_free_all(git_mwindow_file *mwf);
unsigned char *git_mwindow_open(git_mwindow_file *mwf, git_mwindow **cursor, off_t offset, int extra, unsigned int *left);
void git_mwindow_scan_lru(git_mwindow_file *mwf, git_mwindow **lru_w, git_mwindow **lru_l);
int git_mwindow_file_register(git_mwindow_file *mwf);
void git_mwindow_close(git_mwindow **w_cursor);
#endif
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