This commit was manufactured by cvs2svn to create tagpre_jimb_debug

'pre_jimb_debug'.

1 files changed, 0 insertions, 674 deletions

diff --git a/libguile/async.c b/libguile/async.c
deleted file mode 100644
index d2478fd65..000000000
--- a/libguile/async.c
+++ /dev/null
@@ -1,674 +0,0 @@
-/*	Copyright (C) 1995,1996 Free Software Foundation, Inc.
- * 
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this software; see the file COPYING.  If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * As a special exception, the Free Software Foundation gives permission
- * for additional uses of the text contained in its release of GUILE.
- *
- * The exception is that, if you link the GUILE library with other files
- * to produce an executable, this does not by itself cause the
- * resulting executable to be covered by the GNU General Public License.
- * Your use of that executable is in no way restricted on account of
- * linking the GUILE library code into it.
- *
- * This exception does not however invalidate any other reasons why
- * the executable file might be covered by the GNU General Public License.
- *
- * This exception applies only to the code released by the
- * Free Software Foundation under the name GUILE.  If you copy
- * code from other Free Software Foundation releases into a copy of
- * GUILE, as the General Public License permits, the exception does
- * not apply to the code that you add in this way.  To avoid misleading
- * anyone as to the status of such modified files, you must delete
- * this exception notice from them.
- *
- * If you write modifications of your own for GUILE, it is your choice
- * whether to permit this exception to apply to your modifications.
- * If you do not wish that, delete this exception notice.  
- */
-
-
-#include <stdio.h>
-#include <signal.h>
-#include "_scm.h"
-#include "eval.h"
-#include "throw.h"
-#include "smob.h"
-
-#include "async.h"
-
-#ifdef HAVE_STRING_H
-#include <string.h>
-#endif
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
-
-
-/* {Asynchronous Events}
- *
- *
- * Async == thunk + mark.
- *
- * Setting the mark guarantees future execution of the thunk.  More
- * than one set may be satisfied by a single execution.
- * 
- * scm_tick_clock decremented once per SCM_ALLOW_INTS.
- * Async execution triggered by SCM_ALLOW_INTS when scm_tick_clock drops to 0.
- * Async execution prevented by scm_mask_ints != 0.
- *
- * If the clock reaches 0 when scm_mask_ints != 0, then reset the clock
- * to 1.
- *
- * If the clock reaches 0 any other time, run marked asyncs.
- *
- * From a unix signal handler, mark a corresponding async and set the clock
- * to 1.   Do SCM_REDEFER_INTS;/SCM_REALLOW_INTS so that if the signal handler is not
- * called in the dynamic scope of a critical section, it is excecuted immediately.
- *
- * Overall, closely timed signals of a particular sort may be combined.  Pending signals
- * are delivered in a fixed priority order, regardless of arrival order.
- *
- */
-
-
-
-unsigned int scm_async_clock = 20;
-static unsigned int scm_async_rate = 20;
-unsigned int scm_mask_ints = 1;
-
-static unsigned int scm_tick_clock = 0;
-static unsigned int scm_tick_rate = 0;
-static unsigned int scm_desired_tick_rate = 0;
-static unsigned int scm_switch_clock = 0;
-static unsigned int scm_switch_rate = 0;
-static unsigned int scm_desired_switch_rate = 0;
-
-static SCM system_signal_asyncs[SCM_NUM_SIGS];
-static SCM handler_var;
-static SCM symbol_signal;
-
-
-struct scm_async
-{
-  int got_it;			/* needs to be delivered? */
-  SCM thunk;			/* the handler. */
-};
-
-
-static long scm_tc16_async;
-
-#define SCM_ASYNCP(X) 	(scm_tc16_async == SCM_GCTYP16 (X))
-#define SCM_ASYNC(X) 	((struct scm_async *)SCM_CDR (X))
-
-
-
-
-
-
-static int asyncs_pending SCM_P ((void));
-
-static int
-asyncs_pending ()
-{
-  SCM pos;
-  pos = scm_asyncs;
-  while (pos != SCM_EOL)
-    {
-      SCM a;
-      struct scm_async * it;
-      a = SCM_CAR (pos);
-      it = SCM_ASYNC (a);
-      if (it->got_it)
-	return 1;
-      pos = SCM_CDR (pos);
-    }
-  return 0;
-}
-
-
-
-void
-scm_async_click ()
-{
-  int owe_switch;
-  int owe_tick;
-
-  if (!scm_switch_rate)
-    {
-      owe_switch = 0;
-      scm_switch_clock = scm_switch_rate = scm_desired_switch_rate;
-      scm_desired_switch_rate = 0;
-    }
-  else
-    {
-      owe_switch = (scm_async_rate >= scm_switch_clock);
-      if (owe_switch)
-	{
-	  if (scm_desired_switch_rate)
-	    {
-	      scm_switch_clock = scm_switch_rate = scm_desired_switch_rate;
-	      scm_desired_switch_rate = 0;
-	    }
-	  else
-	    scm_switch_clock = scm_switch_rate;
-	}
-      else
-	{
-	  if (scm_desired_switch_rate)
-	    {
-	      scm_switch_clock = scm_switch_rate = scm_desired_switch_rate;
-	      scm_desired_switch_rate = 0;
-	    }
-	  else
-	    scm_switch_clock -= scm_async_rate;
-	}
-    }
-
-  if (scm_mask_ints)
-    {
-      if (owe_switch)
-	scm_switch ();
-      scm_async_clock = 1;
-      return;;
-    }
-  
-  if (!scm_tick_rate)
-    {
-      unsigned int r;
-      owe_tick = 0;
-      r = scm_desired_tick_rate;
-      if (r)
-	{
-	  scm_desired_tick_rate = 0;
-	  scm_tick_rate = r;
-	  scm_tick_clock = r;
-	}
-    }
-  else
-    {
-      owe_tick = (scm_async_rate >= scm_tick_clock);
-      if (owe_tick)
-	{
-	  scm_tick_clock = scm_tick_rate = scm_desired_tick_rate;
-	  scm_desired_tick_rate = 0;
-	}
-      else
-	{
-	  if (scm_desired_tick_rate)
-	    {
-	      scm_tick_clock = scm_tick_rate = scm_desired_tick_rate;
-	      scm_desired_tick_rate = 0;
-	    }
-	  else
-	    scm_tick_clock -= scm_async_rate;
-	}
-    }
-
-  if (owe_tick)
-    scm_async_mark (system_signal_asyncs[SCM_SIG_ORD(SCM_TICK_SIGNAL)]);
-
-  SCM_DEFER_INTS;
-  if (scm_tick_rate && scm_switch_rate)
-    {
-      scm_async_rate = min (scm_tick_clock,  scm_switch_clock);
-      scm_async_clock = scm_async_rate;
-    }
-  else if (scm_tick_rate)
-    {
-      scm_async_clock = scm_async_rate = scm_tick_clock;
-    }
-  else if (scm_switch_rate)
-    {
-      scm_async_clock = scm_async_rate = scm_switch_clock;
-    }
-  else
-    scm_async_clock = scm_async_rate = 1 << 16;
-  SCM_ALLOW_INTS_ONLY;
-
- tail:
-  scm_run_asyncs (scm_asyncs);
-
-  SCM_DEFER_INTS;
-  if (asyncs_pending ())
-    {
-      SCM_ALLOW_INTS_ONLY;
-      goto tail;
-    }
-  SCM_ALLOW_INTS;
-
-  if (owe_switch)
-    scm_switch ();
-}
-
-
-
-
-
-void
-scm_switch ()
-{
-#if 0 /* Thread switching code should probably reside here, but the
-         async switching code doesn't seem to work, so it's put in the
-         SCM_ASYNC_TICK macro instead. /mdj */
-  SCM_THREAD_SWITCHING_CODE;
-#endif
-}
-
-
-
-static void scm_deliver_signal SCM_P ((int num));
-
-static void
-scm_deliver_signal (num)
-     int num;
-{
-  SCM handler;
-  handler = SCM_CDR (handler_var);
-  if (handler != SCM_BOOL_F)
-    scm_apply (handler, SCM_MAKINUM (num), scm_listofnull);
-  else
-    {
-      scm_mask_ints = 0;
-      scm_throw (symbol_signal,
-			   scm_listify (SCM_MAKINUM (num), SCM_UNDEFINED));
-    }
-}
-
-
-
-
-
-static int print_async SCM_P ((SCM exp, SCM port, scm_print_state *pstate));
-
-static int
-print_async (exp, port, pstate)
-     SCM exp;
-     SCM port;
-     scm_print_state *pstate;
-{
-  scm_gen_puts (scm_regular_string, "#<async ", port);
-  scm_intprint(exp, 16, port);
-  scm_gen_putc('>', port);
-  return 1;
-}
-
-
-static SCM mark_async SCM_P ((SCM obj));
-
-static SCM
-mark_async (obj)
-     SCM obj;
-{
-  struct scm_async * it;
-  if (SCM_GC8MARKP (obj))
-    return SCM_BOOL_F;
-  SCM_SETGC8MARK (obj);
-  it = SCM_ASYNC (obj);
-  return it->thunk;
-}
-
-
-static scm_sizet free_async SCM_P ((SCM obj));
-
-static scm_sizet
-free_async (obj)
-     SCM obj;
-{
-  struct scm_async * it;
-  it = SCM_ASYNC (obj);
-  scm_must_free ((char *)it);
-  return (sizeof (*it));
-}
-
-
-static scm_smobfuns  async_smob =
-{
-  mark_async,
-  free_async,
-  print_async,
-  0
-};
-
-
-
-
-SCM_PROC(s_async, "async", 1, 0, 0, scm_async);
-
-SCM
-scm_async (thunk)
-     SCM thunk;
-{
-  SCM it;
-  struct scm_async * async;
-
-  SCM_NEWCELL (it);
-  SCM_DEFER_INTS;
-  SCM_SETCDR (it, SCM_EOL);
-  async = (struct scm_async *)scm_must_malloc (sizeof (*async), s_async);
-  async->got_it = 0;
-  async->thunk = thunk;
-  SCM_SETCDR (it, (SCM)async);
-  SCM_SETCAR (it, (SCM)scm_tc16_async);
-  SCM_ALLOW_INTS;
-  return it;
-}
-
-SCM_PROC(s_system_async, "system-async", 1, 0, 0, scm_system_async);
-
-SCM 
-scm_system_async (thunk)
-     SCM thunk;
-{
-  SCM it;
-  SCM list;
-
-  it = scm_async (thunk);
-  SCM_NEWCELL (list);
-  SCM_DEFER_INTS;
-  SCM_SETCAR (list, it);
-  SCM_SETCDR (list, scm_asyncs);
-  scm_asyncs = list;
-  SCM_ALLOW_INTS;
-  return it;
-}
-
-SCM_PROC(s_async_mark, "async-mark", 1, 0, 0, scm_async_mark);
-
-SCM
-scm_async_mark (a)
-     SCM a;
-{
-  struct scm_async * it;
-  SCM_ASSERT (SCM_NIMP (a) &&  SCM_ASYNCP (a), a, SCM_ARG1, s_async_mark);
-  it = SCM_ASYNC (a);
-  it->got_it = 1;
-  return SCM_UNSPECIFIED;
-}
-
-
-SCM_PROC(s_system_async_mark, "system-async-mark", 1, 0, 0, scm_system_async_mark);
-
-SCM
-scm_system_async_mark (a)
-     SCM a;
-{
-  struct scm_async * it;
-  SCM_ASSERT (SCM_NIMP (a) &&  SCM_ASYNCP (a), a, SCM_ARG1, s_async_mark);
-  it = SCM_ASYNC (a);
-  SCM_REDEFER_INTS;
-  it->got_it = 1;
-  scm_async_rate = 1 + scm_async_rate - scm_async_clock;
-  scm_async_clock = 1;
-  SCM_REALLOW_INTS;
-  return SCM_UNSPECIFIED;
-}
-
-
-SCM_PROC(s_run_asyncs, "run-asyncs", 1, 0, 0, scm_run_asyncs);
-
-SCM
-scm_run_asyncs (list_of_a)
-     SCM list_of_a;
-{
-  SCM pos;
-
-  if (scm_mask_ints)
-    return SCM_BOOL_F;
-  pos = list_of_a;
-  while (pos != SCM_EOL)
-    {
-      SCM a;
-      struct scm_async * it;
-      SCM_ASSERT (SCM_NIMP (pos) && SCM_CONSP (pos), pos, SCM_ARG1, s_run_asyncs);
-      a = SCM_CAR (pos);
-      SCM_ASSERT (SCM_NIMP (a) &&  SCM_ASYNCP (a), a, SCM_ARG1, s_run_asyncs);
-      it = SCM_ASYNC (a);
-      scm_mask_ints = 1;
-      if (it->got_it)
-	{
-	  it->got_it = 0;
-	  scm_apply (it->thunk, SCM_EOL, SCM_EOL);
-	}
-      scm_mask_ints = 0;
-      pos = SCM_CDR (pos);
-    }
-  return SCM_BOOL_T;
-}
-
-
-
-
-SCM_PROC(s_noop, "noop", 0, 0, 1, scm_noop);
-
-SCM
-scm_noop (args)
-     SCM args;
-{
-  return (SCM_NULLP (args)
-	  ? SCM_BOOL_F
-	  : SCM_CAR (args));
-}
-
-
-
-
-SCM_PROC(s_set_tick_rate, "set-tick-rate", 1, 0, 0, scm_set_tick_rate);
-
-SCM
-scm_set_tick_rate (n)
-     SCM n;
-{
-  unsigned int old_n;
-  SCM_ASSERT (SCM_INUMP (n), n, SCM_ARG1, s_set_tick_rate);
-  old_n = scm_tick_rate;
-  scm_desired_tick_rate = SCM_INUM (n);
-  scm_async_rate = 1 + scm_async_rate - scm_async_clock;
-  scm_async_clock = 1;
-  return SCM_MAKINUM (old_n);
-}
-
-
-
-
-SCM_PROC(s_set_switch_rate, "set-switch-rate", 1, 0, 0, scm_set_switch_rate);
-
-SCM
-scm_set_switch_rate (n)
-     SCM n;
-{
-  unsigned int old_n;
-  SCM_ASSERT (SCM_INUMP (n), n, SCM_ARG1, s_set_switch_rate);
-  old_n = scm_switch_rate;
-  scm_desired_switch_rate = SCM_INUM (n);
-  scm_async_rate = 1 + scm_async_rate - scm_async_clock;
-  scm_async_clock = 1;
-  return SCM_MAKINUM (old_n);
-}
-
-
-
-
-static SCM scm_sys_hup_async_thunk SCM_P ((void));
-
-static SCM
-scm_sys_hup_async_thunk ()
-{
-  scm_deliver_signal (SCM_HUP_SIGNAL);
-  return SCM_BOOL_F;
-}
-
-
-static SCM scm_sys_int_async_thunk SCM_P ((void));
-
-static SCM
-scm_sys_int_async_thunk ()
-{
-  scm_deliver_signal (SCM_INT_SIGNAL);
-  return SCM_BOOL_F;
-}
-
-
-static SCM scm_sys_fpe_async_thunk SCM_P ((void));
-
-static SCM
-scm_sys_fpe_async_thunk ()
-{
-  scm_deliver_signal (SCM_FPE_SIGNAL);
-  return SCM_BOOL_F;
-}
-
-
-static SCM scm_sys_bus_async_thunk SCM_P ((void));
-
-static SCM
-scm_sys_bus_async_thunk ()
-{
-  scm_deliver_signal (SCM_BUS_SIGNAL);
-  return SCM_BOOL_F;
-}
-
-
-static SCM scm_sys_segv_async_thunk SCM_P ((void));
-
-static SCM
-scm_sys_segv_async_thunk ()
-{
-  scm_deliver_signal (SCM_SEGV_SIGNAL);
-  return SCM_BOOL_F;
-}
-
-
-static SCM scm_sys_alrm_async_thunk SCM_P ((void));
-
-static SCM
-scm_sys_alrm_async_thunk ()
-{
-  scm_deliver_signal (SCM_ALRM_SIGNAL);
-  return SCM_BOOL_F;
-}
-
-
-static SCM scm_sys_gc_async_thunk SCM_P ((void));
-
-static SCM
-scm_sys_gc_async_thunk ()
-{
-  scm_deliver_signal (SCM_GC_SIGNAL);
-  return SCM_BOOL_F;
-}
-
-
-static SCM scm_sys_tick_async_thunk SCM_P ((void));
-
-static SCM
-scm_sys_tick_async_thunk ()
-{
-  scm_deliver_signal (SCM_TICK_SIGNAL);
-  return SCM_BOOL_F;
-}
-
-
-
-
-
-
-SCM
-scm_take_signal (n)
-     int n;
-{
-  SCM ignored;
-  if (!scm_ints_disabled)
-    {
-      /* For reasons of speed, the SCM_NEWCELL macro doesn't defer
-	 interrupts.  Instead, it first sets its argument to point to
-	 the first cell in the list, and then advances the freelist
-	 pointer to the next cell.  Now, if this procedure is
-	 interrupted, the only anomalous state possible is to have
-	 both SCM_NEWCELL's argument and scm_freelist pointing to the
-	 same cell.  To deal with this case, we always throw away the
-	 first cell in scm_freelist here.
-
-	 At least, that's the theory.  I'm not convinced that that's
-	 the only anomalous path we need to worry about.  */
-      SCM_NEWCELL (ignored);
-    }
-  scm_system_async_mark (system_signal_asyncs[SCM_SIG_ORD(n)]);
-  return SCM_BOOL_F;
-}
-
-
-
-SCM_PROC(s_unmask_signals, "unmask-signals", 0, 0, 0, scm_unmask_signals);
-
-SCM
-scm_unmask_signals ()
-{
-  scm_mask_ints = 0;
-  return SCM_UNSPECIFIED;
-}
-
-
-SCM_PROC(s_mask_signals, "mask-signals", 0, 0, 0, scm_mask_signals);
-
-SCM
-scm_mask_signals ()
-{
-  scm_mask_ints = 1;
-  return SCM_UNSPECIFIED;
-}
-
-
-
-
-void
-scm_init_async ()
-{
-  SCM a_thunk;
-  scm_tc16_async = scm_newsmob (&async_smob);
-  symbol_signal = SCM_CAR (scm_sysintern ("signal", SCM_UNDEFINED));
-  scm_permanent_object (symbol_signal);
-
-  /* These are in the opposite order of delivery priortity. 
-   *
-   * Error conditions are given low priority:
-   */
-  a_thunk = scm_make_gsubr ("%hup-thunk", 0, 0, 0, scm_sys_hup_async_thunk);
-  system_signal_asyncs[SCM_SIG_ORD(SCM_HUP_SIGNAL)] = scm_system_async (a_thunk);
-  a_thunk = scm_make_gsubr ("%int-thunk", 0, 0, 0, scm_sys_int_async_thunk);
-  system_signal_asyncs[SCM_SIG_ORD(SCM_INT_SIGNAL)] = scm_system_async (a_thunk);
-  a_thunk = scm_make_gsubr ("%fpe-thunk", 0, 0, 0, scm_sys_fpe_async_thunk);
-  system_signal_asyncs[SCM_SIG_ORD(SCM_FPE_SIGNAL)] = scm_system_async (a_thunk);
-  a_thunk = scm_make_gsubr ("%bus-thunk", 0, 0, 0, scm_sys_bus_async_thunk);
-  system_signal_asyncs[SCM_SIG_ORD(SCM_BUS_SIGNAL)] = scm_system_async (a_thunk);
-  a_thunk = scm_make_gsubr ("%segv-thunk", 0, 0, 0, scm_sys_segv_async_thunk);
-  system_signal_asyncs[SCM_SIG_ORD(SCM_SEGV_SIGNAL)] = scm_system_async (a_thunk);
-
-
-  a_thunk = scm_make_gsubr ("%gc-thunk", 0, 0, 0, scm_sys_gc_async_thunk);
-  system_signal_asyncs[SCM_SIG_ORD(SCM_GC_SIGNAL)] = scm_system_async (a_thunk);
-
-  /* Clock and PC driven conditions are given highest priority. */
-  a_thunk = scm_make_gsubr ("%tick-thunk", 0, 0, 0, scm_sys_tick_async_thunk);
-  system_signal_asyncs[SCM_SIG_ORD(SCM_TICK_SIGNAL)] = scm_system_async (a_thunk);
-  a_thunk = scm_make_gsubr ("%alrm-thunk", 0, 0, 0, scm_sys_alrm_async_thunk);
-  system_signal_asyncs[SCM_SIG_ORD(SCM_ALRM_SIGNAL)] = scm_system_async (a_thunk);
-
-  handler_var = scm_sysintern ("signal-handler", SCM_UNDEFINED);
-  SCM_SETCDR (handler_var, SCM_BOOL_F);
-  scm_permanent_object (handler_var);
-#include "async.x"
-}