[rfc] WINE_ONCE macro

[Dan Kegel]

There are many places in the wine source that use a static
to print a fixme just once.  Here's a simple macro that
combines declaring and testing the static.

Thoughts?

diff --git a/include/wine/debug.h b/include/wine/debug.h
index ba6fabe..3112401 100644
--- a/include/wine/debug.h
+++ b/include/wine/debug.h
@@ -250,6 +250,8 @@ static inline const char *wine_dbgstr_longlong(
ULONGLONG ll )
 #define WINE_DPRINTF               wine_dbg_printf
 #define WINE_MESSAGE               wine_dbg_printf

+#define WINE_ONCE(s) { static int once; if (!once++) s; }
+
 #ifdef __WINESRC__
 /* Wine uses shorter names that are very likely to conflict with
other software */

@@ -276,6 +278,8 @@ static inline const char *debugstr_w( const WCHAR
*s ) { return wine_dbgstr_wn(
 #define ERR_(ch)                   WINE_ERR_(ch)
 #define ERR_ON(ch)                 WINE_ERR_ON(ch)

+#define ONCE(s)                    WINE_ONCE(s)
+
 #define DPRINTF                    WINE_DPRINTF
 #define MESSAGE                    WINE_MESSAGE


And here's an example of its use:

diff --git a/dlls/msvcr90/msvcr90.c b/dlls/msvcr90/msvcr90.c
index fd24f11..af75095 100644
--- a/dlls/msvcr90/msvcr90.c
+++ b/dlls/msvcr90/msvcr90.c
@@ -310,9 +310,7 @@ int CDECL _atoflt( _CRT_FLOAT *value, char *str )
 DEFINE_THISCALL_WRAPPER(MSVCRT_type_info_name_internal_method,8)
 const char * __thiscall
MSVCRT_type_info_name_internal_method(type_info * _this, struct
__type_info_node *node)
 {
-    static int once;
-
-    if (node && !once++) FIXME("type_info_node parameter ignored\n");
+    if (node) ONCE(FIXME("type_info_node parameter ignored\n"));

     if (!_this->name)
     {