From: Alin Soare <as1789@gmail.com>
To: Emacs Dev <emacs-devel@gnu.org>
Subject: please help concerning specpdl
Date: Sat, 4 Dec 2010 07:33:50 +0200 [thread overview]
Message-ID: <AANLkTim-O08+aton9kyOjf-EBfPUhL494rra5CaB7BzU@mail.gmail.com> (raw)
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Many functions in emacs contain the sequence
{
count = SPECPDL_INDEX ();
record_unwind_protect
val = Fprogn (args);
return unbind_to (count, val);
}
like the function attached below,
Can you explain me the logic of specpdl please ?
DEFUN ("save-current-buffer", Fsave_current_buffer, Ssave_current_buffer, 0,
UNEVALLED, 0,
....
(Lisp_Object args)
{
Lisp_Object val;
int count = SPECPDL_INDEX ();
record_unwind_protect (set_buffer_if_live, Fcurrent_buffer ());
val = Fprogn (args);
return unbind_to (count, val);
}
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next reply other threads:[~2010-12-04 5:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-04 5:33 Alin Soare [this message]
2010-12-06 16:22 ` please help concerning specpdl Davis Herring
2010-12-14 21:25 ` Alin Soare
2010-12-15 0:14 ` Davis Herring
2010-12-15 0:53 ` Ken Raeburn
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