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Added section about frames.

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Marius Vollmer 2004-01-03 21:57:11 +00:00
commit 9879d3906e
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32
NEWS
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@ -1,5 +1,5 @@
Guile NEWS --- history of user-visible changes. Guile NEWS --- history of user-visible changes.
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
See the end for copying conditions. See the end for copying conditions.
Please send Guile bug reports to bug-guile@gnu.org. Please send Guile bug reports to bug-guile@gnu.org.
@ -578,6 +578,36 @@ starting the week.
* Changes to the C interface * Changes to the C interface
** New way to deal with non-local exits and reentries.
There is a new set of functions that essentially do what
scm_internal_dynamic_wind does, but in a more convenient way. Here is
a quick example of how to prevent a potential memory leak:
void
foo ()
{
char *mem;
scm_begin_frame (0);
mem = scm_malloc (100);
scm_on_unwind (free, mem, SCM_F_WIND_EXPLICITELY);
/* MEM would leak if BAR throws an error. SCM_ON_UNWIND frees it
nevertheless.
*/
bar ();
scm_end_frame ();
/* Because of SCM_F_WIND_EXPLICITELY, MEM will be freed by
SCM_END_FRAME as well.
*/
}
For full documentation, see the node "Frames" in the manual.
** New types scm_t_intmax and scm_t_uintmax. ** New types scm_t_intmax and scm_t_uintmax.
On platforms that have them, these types are identical to intmax_t and On platforms that have them, these types are identical to intmax_t and