Mercurial > hg > xemacs-beta
view src/ntplay.c @ 5566:4654c01af32b
Improve the implementation, documentation of #'labels, #'flet.
lisp/ChangeLog addition:
2011-09-07 Aidan Kehoe <kehoea@parhasard.net>
* bytecomp.el:
* bytecomp.el (for-effect): Move this earlier in the file, it's
referenced in byte-compile-initial-macro-environment.
* bytecomp.el (byte-compile-initial-macro-environment):
In the byte-compile-macro-environment definition for #'labels, put
off the compiling the lambda bodies until the point where the rest
of the form is being compiled, allowing the lambda bodies to
access appropriate values for byte-compile-bound-variables, and
reducing excessive warning about free variables.
Add a byte-compile-macro-environment definition for #'flet. This
modifies byte-compile-function-environment appropriately, and
warns about bindings of functions that have macro definitions in
the current environment, about functions that have byte codes, and
about functions that have byte-compile methods (which may not do
what the user wants at runtime).
* bytecomp.el (byte-compile-funcall):
If FUNCTION is constant, call #'byte-compile-callargs-warn if
that's appropriate, giving warnings about problems with calling
functions bound with #'labels.
* cl-macs.el:
* cl-macs.el (flet):
Mention the main difference from Common Lisp, that the bindings
are dynamic, not lexical. Counsel the use of #'labels, not #'flet,
for this and other reasons. Explain the limited single use case for
#'flet. Cross-reference to bytecomp.el in a comment.
* cl-macs.el (labels):
Go into detail on which functions may be called from
where. Explain how to access the function definition of a label
within FORM. Add a comment cross-referencing to bytecomp.el.
man/ChangeLog addition:
2011-09-07 Aidan Kehoe <kehoea@parhasard.net>
* cl.texi (Function Bindings):
Move #'labels first, describe it in more detail, explaining that
it is to be preferred over #'flet, and explaining why.
Explain that dynamic bindings with #'flet will also not work when
functions are accessed through their bytecodes.
author | Aidan Kehoe <kehoea@parhasard.net> |
---|---|
date | Wed, 07 Sep 2011 16:26:45 +0100 |
parents | 308d34e9f07d |
children |
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/* Sound in windows nt XEmacs. Copyright (C) 1998 Andy Piper. Copyright (C) 2001 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>. */ /* Synched up with: Not in FSF. */ /* This file Mule-ized by Ben Wing, 5-15-01. */ #include <config.h> #include "lisp.h" #include "sound.h" #include "syswindows.h" #include "sysfile.h" static int play_sound_data_1 (Binbyte *data, int length, int volume, int convert); void nt_play_sound_file (Lisp_Object path, int UNUSED (volume)) { DWORD flags = SND_ASYNC | SND_NODEFAULT | SND_FILENAME; Lisp_Object fname = Ffile_name_nondirectory (path); Extbyte *fnameext; fnameext = LISP_STRING_TO_TSTR (fname); if (qxeSearchPath (NULL, fnameext, NULL, 0, NULL, NULL) == 0) { /* file isn't in the path so read it as data */ int size; Binbyte *data; int ofd = qxe_open (XSTRING_DATA (path), O_RDONLY | OPEN_BINARY, 0); if (ofd < 0) return; size = lseek (ofd, 0, SEEK_END); data = xnew_binbytes (size); lseek (ofd, 0, SEEK_SET); if (!data) { retry_close (ofd); return; } if (retry_read (ofd, data, size) != size) { retry_close (ofd); xfree (data); return; } retry_close (ofd); play_sound_data_1 (data, size, 100, FALSE); } else qxePlaySound (fnameext, NULL, flags); } /* mswindows can't cope with playing a sound from alloca space so we have to convert if necessary */ static int play_sound_data_1 (Binbyte *data, int length, int UNUSED (volume), int convert_to_malloc) { DWORD flags = SND_ASYNC | SND_MEMORY | SND_NODEFAULT; static Binbyte *sound_data = 0; if (sound_data) { qxePlaySound (NULL, NULL, flags); xfree (sound_data); sound_data = 0; } if (convert_to_malloc) { sound_data = xnew_binbytes (length); memcpy (sound_data, data, length); } else sound_data = data; qxePlaySound ((Extbyte *) sound_data, NULL, flags); /* #### Error handling? */ return 1; } int play_sound_data (Binbyte *data, int length, int volume) { return play_sound_data_1 (data, length, volume, TRUE); }