thodg/libgit2/src/mwindow.h

• Show log

  Commit

• Hash : 8cef828d
  Author :
  Date : 2012-08-18T22:11:49
  

  Make the memory-window conrol structures global
  
  Up to now, the idea was that the user would do all the operations for
  one repository in the same thread. Thus we could have the
  memory-mapped window information thread-local and avoid any locking.
  
  This is not practical in a few environments, such as Apple's GCD which
  allocates threads arbitrarily or the .NET CLR, where the OS-level
  thread can change at any moment.
  
  Make the control structure global and protect it with a mutex so we
  don't depend on the thread currently executing the code.
  

Download

• src/mwindow.h

• /*
   * Copyright (C) 2009-2012 the libgit2 contributors
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  
  #ifndef INCLUDE_mwindow__
  #define INCLUDE_mwindow__
  
  #include "map.h"
  #include "vector.h"
  
  typedef struct git_mwindow {
  	struct git_mwindow *next;
  	git_map window_map;
  	git_off_t offset;
  	size_t last_used;
  	size_t inuse_cnt;
  } git_mwindow;
  
  typedef struct git_mwindow_file {
  	git_mwindow *windows;
  	int fd;
  	git_off_t size;
  } git_mwindow_file;
  
  typedef struct git_mwindow_ctl {
  	size_t mapped;
  	unsigned int open_windows;
  	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, git_off_t offset);
  void git_mwindow_free_all(git_mwindow_file *mwf);
  unsigned char *git_mwindow_open(git_mwindow_file *mwf, git_mwindow **cursor, git_off_t offset, size_t extra, unsigned int *left);
  int git_mwindow_file_register(git_mwindow_file *mwf);
  int git_mwindow_file_deregister(git_mwindow_file *mwf);
  void git_mwindow_close(git_mwindow **w_cursor);
  
  #endif
  

Download