mdw@git.distorted.org.uk Git - mLib/blob - selbuf.h

   1 /* -*-c-*-
   2  *
   3  * $Id: selbuf.h,v 1.1 1999/05/14 21:01:15 mdw Exp $
   4  *
   5  * Line-buffering select handler
   6  *
   7  * (c) 1999 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of the mLib utilities library.
  13  *
  14  * mLib is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU Library General Public License as
  16  * published by the Free Software Foundation; either version 2 of the
  17  * License, or (at your option) any later version.
  18  *
  19  * mLib is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU Library General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU Library General Public
  25  * License along with mLib; if not, write to the Free
  26  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  27  * MA 02111-1307, USA.
  28  */
  29
  30 /*----- Revision history --------------------------------------------------*
  31  *
  32  * $Log: selbuf.h,v $
  33  * Revision 1.1  1999/05/14 21:01:15  mdw
  34  * Integrated `select' handling bits from the background resolver project.
  35  *
  36  */
  37
  38 #ifndef SELBUF_H
  39 #define SELBUF_H
  40
  41 #ifdef __cplusplus
  42   extern "C" {
  43 #endif
  44
  45 /*----- Header files ------------------------------------------------------*/
  46
  47 #ifndef LBUF_H
  48 #  include "lbuf.h"
  49 #endif
  50
  51 #ifndef SEL_H
  52 #  include "sel.h"
  53 #endif
  54
  55 /*----- Data structures ---------------------------------------------------*/
  56
  57 typedef struct selbuf {
  58   sel_file reader;                      /* File selection object */
  59   lbuf b;                               /* Line buffering object */
  60 } selbuf;
  61
  62 /*----- Functions provided ------------------------------------------------*/
  63
  64 /* --- @selbuf_enable@ --- *
  65  *
  66  * Arguments:   @selbuf *b@ = pointer to buffer block
  67  *
  68  * Returns:     ---
  69  *
  70  * Use:         Enables a buffer for reading, and emits any queued lines
  71  *              to the buffer's owner.
  72  */
  73
  74 extern void selbuf_enable(selbuf */*b*/);
  75
  76 /* --- @selbuf_disable@ --- *
  77  *
  78  * Arguments:   @selbuf *b@ = pointer to a buffer block
  79  *
  80  * Returns:     ---
  81  *
  82  * Use:         Disables a buffer.  It won't be read from until it's
  83  *              enabled again.
  84  */
  85
  86 extern void selbuf_disable(selbuf */*b*/);
  87
  88 /* --- @selbuf_init@ --- *
  89  *
  90  * Arguments:   @selbuf *b@ = pointer to buffer block
  91  *              @sel_state *s@ = pointer to select state to attach to
  92  *              @int fd@ = file descriptor to listen to
  93  *              @void (*func)(char *s, void *p)@ = function to call
  94  *              @void *p@ = argument for function
  95  *
  96  * Returns:     ---
  97  *
  98  * Use:         Initializes a buffer block.
  99  */
 100
 101 extern void selbuf_init(selbuf */*b*/,
 102                         sel_state */*s*/,
 103                         int /*fd*/,
 104                         void (*/*func*/)(char */*s*/, void */*p*/),
 105                         void */*p*/);
 106
 107 /*----- That's all, folks -------------------------------------------------*/
 108
 109 #ifdef __cplusplus
 110   }
 111 #endif
 112
 113 #endif