'''Hacking on The Core''' — it's good for the soul!


** Some Debugging Macros **

[PYK] 2015-04-25:  I'm still learning the ropes of [C], but I'll throw these
here anyway.  They came in handy recently to debug an I/O/[thread] issue.

======c
#define tdebug(statement) \
    fprintf(stderr, "%p: %s\n", Tcl_GetCurrentThread(), (statement))

#define tcdebug(statePtr, statement) \
    fprintf(stderr, "%p: chan %s: %s\n", Tcl_GetCurrentThread(), (statePtr)->channelName, (statement))
======

[AMG]: Minor, minor style tweaks, though the macros look good and useful for situations where you can't use the Tcl I/O or command return mechanisms.  The `do ... while (0)` trick is not necessary when the macro is just a single function call.  Arguments to be expanded almost always should be surrounded by parentheses, and you do this, but you had `(statePtr->channelName)` rather than `(statePtr)->channelName`.

<<categories>> The Tcl Core  | Debugging