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authorjan.nijtmans <nijtmans@users.sourceforge.net>2011-08-14 08:23:53 (GMT)
committerjan.nijtmans <nijtmans@users.sourceforge.net>2011-08-14 08:23:53 (GMT)
commitabd37955826e20ddd7de66d3f88b5528c6aa1728 (patch)
treebb84ca16b8b76a5599b73bde8b969a767735fe53 /doc
parent948b2d552982b5117007d46042778e09b38ba9ff (diff)
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[Patch 3124554]: Move WishPanic from Tk to Tcl
Added Documentation
Diffstat (limited to 'doc')
-rw-r--r--doc/FindExec.37
-rw-r--r--doc/Panic.320
2 files changed, 16 insertions, 11 deletions
diff --git a/doc/FindExec.3 b/doc/FindExec.3
index 0e225e9..66cc1f1 100644
--- a/doc/FindExec.3
+++ b/doc/FindExec.3
@@ -45,6 +45,13 @@ application's executable, if possible. If it fails to find
the binary, then future calls to \fBinfo nameofexecutable\fR
will return an empty string.
.PP
+On Windows platforms this procedure is typically invoked as the very
+first thing in the application's main program as well; Its \fIargv[0]\fR
+argument is only used to indicate wheter the executable has a stderr
+channel (any non-null value) or not (the value null). If \fBTcl_SetPanicProc\fR
+is never called and no debugger is running, this determines whether
+the panic message is sent to stderr or to a standard system dialog.
+.PP
\fBTcl_GetNameOfExecutable\fR simply returns a pointer to the
internal full path name of the executable file as computed by
\fBTcl_FindExecutable\fR. This procedure call is the C API
diff --git a/doc/Panic.3 b/doc/Panic.3
index 44eb102..48aed2b 100644
--- a/doc/Panic.3
+++ b/doc/Panic.3
@@ -49,7 +49,10 @@ same formatting rules are also used by the built-in Tcl command
In a freshly loaded Tcl library, \fBTcl_Panic\fR prints the formatted
error message to the standard error file of the process, and then
calls \fBabort\fR to terminate the process. \fBTcl_Panic\fR does not
-return.
+return. On Windows, when a debugger is running, the formatted error
+message is sent to the debugger in stead. If the windows executable
+does not have a stderr channel (e.g. \fBwish.exe\fR), then a
+system dialog box is used to display the panic message.
.PP
\fBTcl_SetPanicProc\fR may be used to modify the behavior of
\fBTcl_Panic\fR. The \fIpanicProc\fR argument should match the
@@ -63,19 +66,14 @@ typedef void \fBTcl_PanicProc\fR(
.PP
After \fBTcl_SetPanicProc\fR returns, any future calls to
\fBTcl_Panic\fR will call \fIpanicProc\fR, passing along the
-\fIformat\fR and \fIarg\fR arguments. To maintain consistency with the
-callers of \fBTcl_Panic\fR, \fIpanicProc\fR must not return; it must
-call \fBabort\fR. \fIpanicProc\fR should avoid making calls into the
-Tcl library, or into other libraries that may call the Tcl library,
-since the original call to \fBTcl_Panic\fR indicates the Tcl library is
-not in a state of reliable operation.
+\fIformat\fR and \fIarg\fR arguments. \fIpanicProc\fR should avoid
+making calls into the Tcl library, or into other libraries that may
+call the Tcl library, since the original call to \fBTcl_Panic\fR
+indicates the Tcl library is not in a state of reliable operation.
.PP
The typical use of \fBTcl_SetPanicProc\fR arranges for the error message
to be displayed or reported in a manner more suitable for the
-application or the platform. As an example, the Windows implementation
-of \fBwish\fR calls \fBTcl_SetPanicProc\fR to force all panic messages
-to be displayed in a system dialog box, rather than to be printed to the
-standard error file (usually not visible under Windows).
+application or the platform.
.PP
Although the primary callers of \fBTcl_Panic\fR are the procedures of
the Tcl library, \fBTcl_Panic\fR is a public function and may be called