libguile/iselect.h

   1 /* classes: h_files */
   2
   3 #ifndef ISELECTH
   4 #define ISELECTH
   5
   6 /*      Copyright (C) 1997, 1998 Free Software Foundation, Inc.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2, or (at your option)
  11  * any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this software; see the file COPYING.  If not, write to
  20  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  * As a special exception, the Free Software Foundation gives permission
  23  * for additional uses of the text contained in its release of GUILE.
  24  *
  25  * The exception is that, if you link the GUILE library with other files
  26  * to produce an executable, this does not by itself cause the
  27  * resulting executable to be covered by the GNU General Public License.
  28  * Your use of that executable is in no way restricted on account of
  29  * linking the GUILE library code into it.
  30  *
  31  * This exception does not however invalidate any other reasons why
  32  * the executable file might be covered by the GNU General Public License.
  33  *
  34  * This exception applies only to the code released by the
  35  * Free Software Foundation under the name GUILE.  If you copy
  36  * code from other Free Software Foundation releases into a copy of
  37  * GUILE, as the General Public License permits, the exception does
  38  * not apply to the code that you add in this way.  To avoid misleading
  39  * anyone as to the status of such modified files, you must delete
  40  * this exception notice from them.
  41  *
  42  * If you write modifications of your own for GUILE, it is your choice
  43  * whether to permit this exception to apply to your modifications.
  44  * If you do not wish that, delete this exception notice.
  45  */
  46
  47 #include "libguile/__scm.h"
  48
  49 /* Needed for FD_SET on some systems.  */
  50 #include <sys/types.h>
  51
  52 # ifdef TIME_WITH_SYS_TIME
  53 #  include <sys/time.h>
  54 #  include <time.h>
  55 # else
  56 #  ifdef HAVE_SYS_TIME_H
  57 #   include <sys/time.h>
  58 #  else
  59 #   ifdef HAVE_TIME_H
  60 #    include <time.h>
  61 #   endif
  62 #  endif
  63 # endif
  64
  65 #ifdef HAVE_SYS_SELECT_H
  66 #include <sys/select.h>
  67 #endif
  68
  69 #ifdef FD_SET
  70
  71 #define SELECT_TYPE fd_set
  72 #define SELECT_SET_SIZE FD_SETSIZE
  73
  74 #else /* no FD_SET */
  75
  76 /* Define the macros to access a single-int bitmap of descriptors.  */
  77 #define SELECT_SET_SIZE 32
  78 #define SELECT_TYPE int
  79 #define FD_SET(n, p) (*(p) |= (1 << (n)))
  80 #define FD_CLR(n, p) (*(p) &= ~(1 << (n)))
  81 #define FD_ISSET(n, p) (*(p) & (1 << (n)))
  82 #define FD_ZERO(p) (*(p) = 0)
  83
  84 #endif /* no FD_SET */
  85
  86 #ifdef GUILE_ISELECT
  87
  88 extern int scm_I_am_dead;
  89
  90 extern int scm_internal_select (int fds,
  91                                 SELECT_TYPE *rfds,
  92                                 SELECT_TYPE *wfds,
  93                                 SELECT_TYPE *efds,
  94                                 struct timeval *timeout);
  95 extern void scm_error_revive_threads (void);
  96 extern void scm_init_iselect (void);
  97
  98 #else /* GUILE_ISELECT */
  99 #define scm_internal_select select
 100 #endif /* GUILE_ISELECT */
 101
 102 #endif