libguile/threads.c

   1 /*      Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2, or (at your option)
   6  * any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this software; see the file COPYING.  If not, write to
  15  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  16  * Boston, MA 02111-1307 USA
  17  *
  18  * As a special exception, the Free Software Foundation gives permission
  19  * for additional uses of the text contained in its release of GUILE.
  20  *
  21  * The exception is that, if you link the GUILE library with other files
  22  * to produce an executable, this does not by itself cause the
  23  * resulting executable to be covered by the GNU General Public License.
  24  * Your use of that executable is in no way restricted on account of
  25  * linking the GUILE library code into it.
  26  *
  27  * This exception does not however invalidate any other reasons why
  28  * the executable file might be covered by the GNU General Public License.
  29  *
  30  * This exception applies only to the code released by the
  31  * Free Software Foundation under the name GUILE.  If you copy
  32  * code from other Free Software Foundation releases into a copy of
  33  * GUILE, as the General Public License permits, the exception does
  34  * not apply to the code that you add in this way.  To avoid misleading
  35  * anyone as to the status of such modified files, you must delete
  36  * this exception notice from them.
  37  *
  38  * If you write modifications of your own for GUILE, it is your choice
  39  * whether to permit this exception to apply to your modifications.
  40  * If you do not wish that, delete this exception notice.  */
  41 \f
  42
  43 #include <stdio.h>
  44 #include "_scm.h"
  45 #include "dynwind.h"
  46 #include "smob.h"
  47
  48 #include "threads.h"
  49
  50 \f
  51
  52 long scm_tc16_thread;
  53
  54 long scm_tc16_mutex;
  55
  56 long scm_tc16_condvar;
  57
  58 \f
  59 /* Scheme-visible thread functions. */
  60
  61 #ifdef USE_COOP_THREADS
  62 SCM_PROC(s_single_thread_p, "single-active-thread?", 0, 0, 0, scm_single_thread_p);
  63 #endif
  64 SCM_PROC(s_yield, "yield", 0, 0, 0, scm_yield);
  65 SCM_PROC(s_call_with_new_thread, "call-with-new-thread", 0, 0, 1, scm_call_with_new_thread);
  66 SCM_PROC(s_join_thread, "join-thread", 1, 0, 0, scm_join_thread);
  67 SCM_PROC(s_make_mutex, "make-mutex", 0, 0, 0, scm_make_mutex);
  68 SCM_PROC(s_lock_mutex, "lock-mutex", 1, 0, 0, scm_lock_mutex);
  69 SCM_PROC(s_unlock_mutex, "unlock-mutex", 1, 0, 0, scm_unlock_mutex);
  70 SCM_PROC(s_make_condition_variable, "make-condition-variable", 0, 0, 0, scm_make_condition_variable);
  71 SCM_PROC(s_wait_condition_variable, "wait-condition-variable", 2, 0, 0, scm_wait_condition_variable);
  72 SCM_PROC(s_signal_condition_variable, "signal-condition-variable", 1, 0, 0, scm_signal_condition_variable);
  73
  74 \f
  75
  76 #ifdef USE_MIT_PTHREADS
  77 #include "mit-pthreads.c"
  78 #endif
  79
  80 #ifdef USE_COOP_THREADS
  81 #include "coop-threads.c"
  82 #endif
  83
  84 static int
  85 print_thread (exp, port, pstate)
  86      SCM exp;
  87      SCM port;
  88      scm_print_state *pstate;
  89 {
  90   scm_puts ("#<thread ", port);
  91   scm_intprint (SCM_CDR (exp), 16, port);
  92   scm_putc ('>', port);
  93   return 1;
  94 }
  95
  96 static scm_smobfuns thread_smob =
  97 {
  98   scm_mark0,
  99   scm_threads_free_thread,
 100   print_thread,
 101   0
 102 };
 103
 104 static int
 105 print_mutex (exp, port, pstate)
 106      SCM exp;
 107      SCM port;
 108      scm_print_state *pstate;
 109 {
 110   scm_puts ("#<mutex ", port);
 111   scm_intprint (SCM_CDR (exp), 16, port);
 112   scm_putc ('>', port);
 113   return 1;
 114 }
 115
 116 static scm_smobfuns mutex_smob =
 117 {
 118   scm_mark0,
 119   scm_threads_free_mutex,
 120   print_mutex,
 121   0
 122 };
 123
 124 static int
 125 print_condvar (exp, port, pstate)
 126      SCM exp;
 127      SCM port;
 128      scm_print_state *pstate;
 129 {
 130   scm_puts ("#<condition-variable ", port);
 131   scm_intprint (SCM_CDR (exp), 16, port);
 132   scm_putc ('>', port);
 133   return 1;
 134 }
 135
 136 static scm_smobfuns condvar_smob =
 137 {
 138   scm_mark0,
 139   scm_threads_free_condvar,
 140   print_condvar,
 141   0
 142 };
 143
 144 \f
 145
 146 #ifdef __STDC__
 147 void
 148 scm_init_threads (SCM_STACKITEM *i)
 149 #else
 150 void
 151 scm_init_threads (i)
 152      SCM_STACKITEM *i;
 153 #endif
 154 {
 155   scm_tc16_thread = scm_newsmob (&thread_smob);
 156   scm_tc16_mutex = scm_newsmob (&mutex_smob);
 157   scm_tc16_condvar = scm_newsmob (&condvar_smob);
 158 #include "threads.x"
 159   /* Initialize implementation specific details of the threads support */
 160   scm_threads_init (i);
 161 }