/[svn]/branches/newio/include/dbuf.h
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revision 2387 by michael, Sat Jul 6 16:22:05 2013 UTC revision 2388 by michael, Tue Jul 9 11:22:52 2013 UTC
# Line 1  Line 1 
1  /*  /*
2   *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).   *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
  *  dbuf.h: A header for the dynamic buffers functions.  
3   *   *
4   *  Copyright (C) 2002 by the past and present ircd coders, and others.   *  Copyright (C) 1990 Markku Savela
5     *  Copyright (C) 2013 by the Hybrid Development Team.
6   *   *
7   *  This program is free software; you can redistribute it and/or modify   *  This program is free software; you can redistribute it and/or modify
8   *  it under the terms of the GNU General Public License as published by   *  it under the terms of the GNU General Public License as published by
# Line 18  Line 18 
18   *  along with this program; if not, write to the Free Software   *  along with this program; if not, write to the Free Software
19   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
20   *  USA   *  USA
  *  
  *  $Id$  
21   */   */
22    
23  #ifndef __DBUF_H_INCLUDED  /*! \file dbuf.h
24  #define __DBUF_H_INCLUDED   * \brief Interfaces and declarations for dealing with data buffers.
25     * \version $Id$
26     */
27    
28  #define DBUF_BLOCK_SIZE 1024  /* this is also our MTU used for sending */  #ifndef INCLUDED_dbuf_h
29    #define INCLUDED_dbuf_h
30    #ifndef INCLUDED_sys_types_h
31    #include <sys/types.h>          /* size_t */
32    #define INCLUDED_sys_types_h
33    #endif
34    
35  #define dbuf_length(x) ((x)->total_size)  /*
36  #define dbuf_clear(x) dbuf_delete(x, dbuf_length(x))   * These two globals should be considered read only
37     */
38    extern int DBufAllocCount;
39    extern int DBufUsedCount;
40    
41  struct dbuf_block  struct DBufBuffer;
 {  
   size_t size;  
   char data[DBUF_BLOCK_SIZE];  
 };  
42    
43  struct dbuf_queue  /** Queue of data chunks. */
44    struct DBuf
45  {  {
46    dlink_list blocks;    unsigned int length;     /**< Current number of bytes stored */
47    size_t total_size;    struct DBufBuffer *head; /**< First data buffer, if length > 0 */
48      struct DBufBuffer *tail; /**< Last data buffer, if length > 0 */
49  };  };
50    
51  extern void dbuf_init(void);  /** Return number of bytes in a DBuf. */
52  extern void dbuf_put(struct dbuf_queue *, char *, size_t);  #define DBufLength(dyn) ((dyn)->length)
53  extern void dbuf_delete(struct dbuf_queue *, size_t);  
54  #endif  /** Release the entire content of a DBuf. */
55    #define DBufClear(dyn) dbuf_delete((dyn), DBufLength(dyn))
56    
57    /*
58     * Prototypes
59     */
60    extern void dbuf_delete(struct DBuf *, unsigned int);
61    extern int dbuf_put(struct DBuf *, const char *, unsigned int);
62    extern const char *dbuf_map(const struct DBuf *, unsigned int *);
63    extern unsigned int dbuf_get(struct DBuf *, char *, unsigned int);
64    extern unsigned int dbuf_getmsg(struct DBuf *, char *, unsigned int);
65    extern void dbuf_count_memory(size_t *, size_t *);
66    #endif /* INCLUDED_dbuf_h */
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