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><A
NAME="DBG-CHANNELS"
>2.2. Debugging channels</A
></H1
><P
> Each component is assigned a debugging channel. The
identifier of the channel must be a valid C identifier
(reserved word like <SPAN
CLASS="TYPE"
>int</SPAN
> or <SPAN
CLASS="TYPE"
>static</SPAN
>
are premitted). To use a new channel, simply use it in
your code. It will be picked up automatically by the build process.
</P
><P
> Typically, a file contains code pertaining to only one component,
and as such, there is only one channel to output to. You can declare
a default chanel for the file using the
<CODE
CLASS="SYMBOL"
>WINE_DEFAULT_DEBUG_CHANNEL()</CODE
> macro:
<PRE
CLASS="PROGRAMLISTING"
>#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(xxx);
...
FIXME("some unimplemented feature", ...);
...
if (zero != 0)
ERR("This should never be non-null: %d", zero);
...
</PRE
>
</P
><P
> In rare situations there is a need to output to more than one
debug channel per file. In such cases, you need to declare
all the additional channels at the top of the file, and
use the _-version of the debugging macros:
<PRE
CLASS="PROGRAMLISTING"
>#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(xxx);
WINE_DECLARE_DEBUG_CHANNEL(yyy);
WINE_DECLARE_DEBUG_CHANNEL(zzz);
...
FIXME("this one goes to xxx channel");
...
FIXME_(yyy)("Some other msg for the yyy channel");
...
WARN_(zzz)("And yet another msg on another channel!");
...
</PRE
>
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