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Add a macro to make gcc warn if a function result is ignored. (#145466,

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2005-12-04  Matthias Clasen  <mclasen@redhat.com>

	* glib/gmacros.h (G_GNUC_WARN_UNUSED_RESULT): Add a macro
	to make gcc warn if a function result is ignored.  (#145466,
	Arjan van de Ven, Alex Larsson)

	* glib/gmem.h: Add the new attribute to g_realloc and
	g_try_realloc.
This commit is contained in:
Matthias Clasen 2005-12-04 06:41:58 +00:00 committed by Matthias Clasen
parent 36c836435b
commit 00f952f8e8
8 changed files with 51 additions and 2 deletions
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9
ChangeLog
View File

@ -1,3 +1,12 @@
2005-12-04 Matthias Clasen <mclasen@redhat.com>
* glib/gmacros.h (G_GNUC_WARN_UNUSED_RESULT): Add a macro
to make gcc warn if a function result is ignored. (#145466,
Arjan van de Ven, Alex Larsson)
* glib/gmem.h: Add the new attribute to g_realloc and
g_try_realloc.
2005-12-03 Matthias Clasen <mclasen@redhat.com>
* glib/glib.symbols:

9
ChangeLog.pre-2-10
View File

@ -1,3 +1,12 @@
2005-12-04 Matthias Clasen <mclasen@redhat.com>
* glib/gmacros.h (G_GNUC_WARN_UNUSED_RESULT): Add a macro
to make gcc warn if a function result is ignored. (#145466,
Arjan van de Ven, Alex Larsson)
* glib/gmem.h: Add the new attribute to g_realloc and
g_try_realloc.
2005-12-03 Matthias Clasen <mclasen@redhat.com>
* glib/glib.symbols:

9
ChangeLog.pre-2-12
View File

@ -1,3 +1,12 @@
2005-12-04 Matthias Clasen <mclasen@redhat.com>
* glib/gmacros.h (G_GNUC_WARN_UNUSED_RESULT): Add a macro
to make gcc warn if a function result is ignored. (#145466,
Arjan van de Ven, Alex Larsson)
* glib/gmem.h: Add the new attribute to g_realloc and
g_try_realloc.
2005-12-03 Matthias Clasen <mclasen@redhat.com>
* glib/glib.symbols:

4
docs/reference/ChangeLog
View File

@ -1,3 +1,7 @@
2005-12-04 Matthias Clasen <mclasen@redhat.com>
* glib/tmpl/macros_misc.sgml: Document G_GNUC_WARN_UNUSED_RESULT.
2005-12-03 Matthias Clasen <mclasen@redhat.com>
* glib/tmpl/caches.sgml: Document g_cache_value_foreach

1
docs/reference/glib/glib-sections.txt
View File

@ -323,6 +323,7 @@ G_GNUC_PRINTF
G_GNUC_SCANF
G_GNUC_FORMAT
G_GNUC_NULL_TERMINATED
G_GNUC_WARN_UNUSED_RESULT
G_GNUC_FUNCTION
G_GNUC_PRETTY_FUNCTION
G_GNUC_NO_INSTRUMENT

10
docs/reference/glib/tmpl/macros_misc.sgml
View File

@ -250,6 +250,16 @@ See the GNU C documentation for details.
Since: 2.8
<!-- ##### MACRO G_GNUC_WARN_UNUSED_RESULT ##### -->
<para>
Expands to the GNU C <literal>warn_unused_ersult</literal> function attribute
if the compiler is <command>gcc</command>, or "" if it isn't. This function
attribute makes the compiler emit a warning if the result of a function call
is ignored. See the GNU C documentation for details.
</para>
Since: 2.10
<!-- ##### MACRO G_GNUC_FUNCTION ##### -->
<para>

7
glib/gmacros.h
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@ -95,6 +95,13 @@
#define G_GNUC_DEPRECATED
#endif /* __GNUC__ */
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
#define G_GNUC_WARN_UNUSED_RESULT \
__attribute__((warn_unused_result))
#else
#define G_GNUC_WARN_UNUSED_RESULT
#endif /* __GNUC__ */
/* Wrap the gcc __PRETTY_FUNCTION__ and __FUNCTION__ variables with
* macros, so we can refer to them as strings unconditionally.
* usage not-recommended since gcc-3.0

4
glib/gmem.h
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@ -47,12 +47,12 @@ typedef struct _GMemVTable GMemVTable;
gpointer g_malloc (gulong n_bytes) G_GNUC_MALLOC;
gpointer g_malloc0 (gulong n_bytes) G_GNUC_MALLOC;
gpointer g_realloc (gpointer mem,
gulong n_bytes);
gulong n_bytes) G_GNUC_WARN_UNUSED_RESULT;
void g_free (gpointer mem);
gpointer g_try_malloc (gulong n_bytes) G_GNUC_MALLOC;
gpointer g_try_malloc0 (gulong n_bytes) G_GNUC_MALLOC;
gpointer g_try_realloc (gpointer mem,
gulong n_bytes);
gulong n_bytes) G_GNUC_WARN_UNUSED_RESULT;
/* Convenience memory allocators