[xemacs-hg @ 2002-05-28 08:44:22 by ben] merge my stderr-proc ws make-docfile.c: Fix places where we forget to check for EOF. code-init.el: Don't use CRLF conversion by default on process output. CMD.EXE and friends work both ways but Cygwin programs don't like the CRs. code-process.el, multicast.el, process.el: Removed. Improvements to call-process-internal: -- allows a buffer to be specified for input and stderr output -- use it on all systems -- implement C-g as documented -- clean up and comment call-process-region uses new call-process facilities; no temp file. remove duplicate funs in process.el. comment exactly how coding systems work and fix various problems. open-multicast-group now does similar coding-system frobbing to open-network-stream. dumped-lisp.el, faces.el, msw-faces.el: Fix some hidden errors due to code not being defined at the right time. xemacs.mak: Add -DSTRICT. ================================================================ ALLOW SEPARATION OF STDOUT AND STDERR IN PROCESSES ================================================================ Standard output and standard error can be processed separately in a process. Each can have its own buffer, its own mark in that buffer, and its filter function. You can specify a separate buffer for stderr in `start-process' to get things started, or use the new primitives: set-process-stderr-buffer process-stderr-buffer process-stderr-mark set-process-stderr-filter process-stderr-filter Also, process-send-region takes a 4th optional arg, a buffer. Currently always uses a pipe() under Unix to read the error output. (#### Would a PTY be better?) sysdep.h, sysproc.h, unexfreebsd.c, unexsunos4.c, nt.c, emacs.c, callproc.c, symsinit.h, sysdep.c, Makefile.in.in, process-unix.c: Delete callproc.c. Move child_setup() to process-unix.c. wait_for_termination() now only needed on a few really old systems. console-msw.h, event-Xt.c, event-msw.c, event-stream.c, event-tty.c, event-unixoid.c, events.h, process-nt.c, process-unix.c, process.c, process.h, procimpl.h: Rewrite the process methods to handle a separate channel for error input. Create Lstreams for reading in the error channel. Many process methods need change. In general the changes are fairly clear as they involve duplicating what's used for reading the normal stdout and changing for stderr -- although tedious, as such changes are required throughout the entire process code. Rewrote the code that reads process output to do two loops, one for stdout and one for stderr. gpmevent.c, tooltalk.c: set_process_filter takes an argument for stderr. ================================================================ NEW ERROR-TRAPPING MECHANISM ================================================================ Totally rewrite error trapping code to be unified and support more features. Basic function is call_trapping_problems(), which lets you specify, by means of flags, what sorts of problems you want trapped. these can include -- quit -- errors -- throws past the function -- creation of "display objects" (e.g. buffers) -- deletion of already-existing "display objects" (e.g. buffers) -- modification of already-existing buffers -- entering the debugger -- gc -- errors->warnings (ala suspended errors) etc. All other error funs rewritten in terms of this one. Various older mechanisms removed or rewritten. window.c, insdel.c, console.c, buffer.c, device.c, frame.c: When creating a display object, added call to note_object_created(), for use with trapping_problems mechanism. When deleting, call check_allowed_operation() and note_object deleted(). The trapping-problems code records the objects created since the call-trapping-problems began. Those objects can be deleted, but none others (i.e. previously existing ones). bytecode.c, cmdloop.c: internal_catch takes another arg. eval.c: Add long comments describing the "five lists" used to maintain state (backtrace, gcpro, specbind, etc.) in the Lisp engine. backtrace.h, eval.c: Implement trapping-problems mechanism, eliminate old mechanisms or redo in terms of new one. frame.c, gutter.c: Flush out the concept of "critical display section", defined by the in_display() var. Use an internal_bind() to get it reset, rather than just doing it at end, because there may be a non-local exit. event-msw.c, event-stream.c, console-msw.h, device.c, dialog-msw.c, frame.c, frame.h, intl.c, toolbar.c, menubar-msw.c, redisplay.c, alloc.c, menubar-x.c: Make use of new trapping-errors stuff and rewrite code based on old mechanisms. glyphs-widget.c, redisplay.h: Protect calling Lisp in redisplay. insdel.c: Protect hooks against deleting existing buffers. frame-msw.c: Use EQ, not EQUAL in hash tables whose keys are just numbers. Otherwise we run into stickiness in redisplay because internal_equal() can QUIT. ================================================================ SIGNAL, C-G CHANGES ================================================================ Here we change the way that C-g interacts with event reading. The idea is that a C-g occurring while we're reading a user event should be read as C-g, but elsewhere should be a QUIT. The former code did all sorts of bizarreness -- requiring that no QUIT occurs anywhere in event-reading code (impossible to enforce given the stuff called or Lisp code invoked), and having some weird system involving enqueue/dequeue of a C-g and interaction with Vquit_flag -- and it didn't work. Now, we simply enclose all code where we want C-g read as an event with {begin/end}_dont_check_for_quit(). This completely turns off the mechanism that checks (and may remove or alter) C-g in the read-ahead queues, so we just get the C-g normal. Signal.c documents this very carefully. cmdloop.c: Correct use of dont_check_for_quit to new scheme, remove old out-of-date comments. event-stream.c: Fix C-g handling to actually work. device-x.c: Disable quit checking when err out. signal.c: Cleanup. Add large descriptive comment. process-unix.c, process-nt.c, sysdep.c: Use QUIT instead of REALLY_QUIT. It's not necessary to use REALLY_QUIT and just confuses the issue. lisp.h: Comment quit handlers. ================================================================ CONS CHANGES ================================================================ free_cons() now takes a Lisp_Object not the result of XCONS(). car and cdr have been renamed so that they don't get used directly; go through XCAR(), XCDR() instead. alloc.c, dired.c, editfns.c, emodules.c, fns.c, glyphs-msw.c, glyphs-x.c, glyphs.c, keymap.c, minibuf.c, search.c, eval.c, lread.c, lisp.h: Correct free_cons calling convention: now takes Lisp_Object, not Lisp_Cons chartab.c: Eliminate direct use of ->car, ->cdr, should be black box. callint.c: Rewrote using EXTERNAL_LIST_LOOP to avoid use of Lisp_Cons. ================================================================ USE INTERNAL-BIND-* ================================================================ eval.c: Cleanups of these funs. alloc.c, fileio.c, undo.c, specifier.c, text.c, profile.c, lread.c, redisplay.c, menubar-x.c, macros.c: Rewrote to use internal_bind_int() and internal_bind_lisp_object() in place of whatever varied and cumbersome mechanisms were formerly there. ================================================================ SPECBIND SANITY ================================================================ backtrace.h: - Improved comments backtrace.h, bytecode.c, eval.c: Add new mechanism check_specbind_stack_sanity() for sanity checking code each time the catchlist or specbind stack change. Removed older prototype of same mechanism. ================================================================ MISC ================================================================ lisp.h, insdel.c, window.c, device.c, console.c, buffer.c: Fleshed out authorship. device-msw.c: Correct bad Unicode-ization. print.c: Be more careful when not initialized or in fatal error handling. search.c: Eliminate running_asynch_code, an FSF holdover. alloc.c: Added comments about gc-cons-threshold. dialog-x.c: Use begin_gc_forbidden() around code to build up a widget value tree, like in menubar-x.c. gui.c: Use Qunbound not Qnil as the default for gethash. lisp-disunion.h, lisp-union.h: Added warnings on use of VOID_TO_LISP(). lisp.h: Use ERROR_CHECK_STRUCTURES to turn on ERROR_CHECK_TRAPPING_PROBLEMS and ERROR_CHECK_TYPECHECK lisp.h: Add assert_with_message. lisp.h: Add macros for gcproing entire arrays. (You could do this before but it required manual twiddling the gcpro structure.) lisp.h: Add prototypes for new functions defined elsewhere.

/* Opaque Lisp objects.
   Copyright (C) 1993, 1994, 1995 Sun Microsystems, Inc.
   Copyright (C) 1995, 1996, 2002 Ben Wing.

This file is part of XEmacs.

XEmacs 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.

XEmacs 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 XEmacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Synched up with: Not in FSF. */

/* Written by Ben Wing, October 1993. */

/* "Opaque" is used internally to hold keep track of allocated memory
   so it gets GC'd properly, and to store arbitrary data in places
   where a Lisp_Object is required and which may get GC'd. (e.g.  as
   the argument to record_unwind_protect()).  Once created in C,
   opaque objects cannot be resized.

   OPAQUE OBJECTS SHOULD NEVER ESCAPE TO THE LISP LEVEL.  Some code
   depends on this.  As such, opaque objects are a generalization
   of the Qunbound marker.
 */

#include <config.h>
#include "lisp.h"
#include "opaque.h"

Lisp_Object Vopaque_ptr_free_list;

/* Should never, ever be called. (except by an external debugger) */
static void
print_opaque (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
{
  const Lisp_Opaque *p = XOPAQUE (obj);

  write_fmt_string
    (printcharfun,
     "#<INTERNAL OBJECT (XEmacs bug?) (opaque, size=%lu) 0x%lx>",
     (long)(p->size), (unsigned long) p);
}

inline static Bytecount
aligned_sizeof_opaque (Bytecount opaque_size)
{
  return MAX_ALIGN_SIZE (offsetof (Lisp_Opaque, data) + opaque_size);
}

static Bytecount
sizeof_opaque (const void *header)
{
  return aligned_sizeof_opaque (((const Lisp_Opaque *) header)->size);
}

/* Return an opaque object of size SIZE.
   If DATA is OPAQUE_CLEAR, the object's data is memset to '\0' bytes.
   If DATA is OPAQUE_UNINIT, the object's data is uninitialized.
   Else the object's data is initialized by copying from DATA. */
Lisp_Object
make_opaque (const void *data, Bytecount size)
{
  Lisp_Opaque *p = (Lisp_Opaque *)
    alloc_lcrecord (aligned_sizeof_opaque (size), &lrecord_opaque);
  p->size = size;

  if (data == OPAQUE_CLEAR)
    memset (p->data, '\0', size);
  else if (data == OPAQUE_UNINIT)
    DO_NOTHING;
  else
    memcpy (p->data, data, size);

  {
    return wrap_opaque (p);
  }
}

/* This will not work correctly for opaques with subobjects! */

static int
equal_opaque (Lisp_Object obj1, Lisp_Object obj2, int depth)
{
  Bytecount size;
  return ((size = XOPAQUE_SIZE (obj1)) == XOPAQUE_SIZE (obj2) &&
	  !memcmp (XOPAQUE_DATA (obj1), XOPAQUE_DATA (obj2), size));
}

/* This will not work correctly for opaques with subobjects! */

static unsigned long
hash_opaque (Lisp_Object obj, int depth)
{
  if (XOPAQUE_SIZE (obj) == sizeof (unsigned long))
    return *((unsigned long *) XOPAQUE_DATA (obj));
  else
    return memory_hash (XOPAQUE_DATA (obj), XOPAQUE_SIZE (obj));
}

static const struct lrecord_description opaque_description[] = {
  { XD_END }
};

DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION ("opaque", opaque,
					0, print_opaque, 0,
					equal_opaque, hash_opaque,
					opaque_description,
					sizeof_opaque, Lisp_Opaque);

/* stuff to handle opaque pointers */

/* Should never, ever be called. (except by an external debugger) */
static void
print_opaque_ptr (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
{
  const Lisp_Opaque_Ptr *p = XOPAQUE_PTR (obj);

  write_fmt_string
    (printcharfun,
     "#<INTERNAL OBJECT (XEmacs bug?) (opaque-ptr, adr=0x%lx) 0x%lx>",
     (long)(p->ptr), (unsigned long) p);
}

static int
equal_opaque_ptr (Lisp_Object obj1, Lisp_Object obj2, int depth)
{
  return (XOPAQUE_PTR (obj1)->ptr == XOPAQUE_PTR (obj2)->ptr);
}

static unsigned long
hash_opaque_ptr (Lisp_Object obj, int depth)
{
  return (unsigned long) XOPAQUE_PTR (obj)->ptr;
}

DEFINE_LRECORD_IMPLEMENTATION ("opaque-ptr", opaque_ptr,
			       0, print_opaque_ptr, 0,
			       equal_opaque_ptr, hash_opaque_ptr, 0,
			       Lisp_Opaque_Ptr);

Lisp_Object
make_opaque_ptr (void *val)
{
  Lisp_Object res = allocate_managed_lcrecord (Vopaque_ptr_free_list);
  set_opaque_ptr (res, val);
  return res;
}

/* Be very very careful with this.  Same admonitions as with
   free_cons() apply. */

void
free_opaque_ptr (Lisp_Object ptr)
{
  free_managed_lcrecord (Vopaque_ptr_free_list, ptr);
}

void
reinit_opaque_once_early (void)
{
  Vopaque_ptr_free_list = make_lcrecord_list (sizeof (Lisp_Opaque_Ptr),
					      &lrecord_opaque_ptr);
  staticpro_nodump (&Vopaque_ptr_free_list);
}

void
init_opaque_once_early (void)
{
  INIT_LRECORD_IMPLEMENTATION (opaque);
  INIT_LRECORD_IMPLEMENTATION (opaque_ptr);

  reinit_opaque_once_early ();
}