diff options
Diffstat (limited to 'doc/Cancel.3')
| -rw-r--r-- | doc/Cancel.3 | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/doc/Cancel.3 b/doc/Cancel.3 index 5d258b7..f6b1636 100644 --- a/doc/Cancel.3 +++ b/doc/Cancel.3 @@ -13,20 +13,25 @@ Tcl_CancelEval, Tcl_Canceled \- cancel Tcl scripts .nf \fB#include <tcl.h>\fR int -\fBTcl_CancelEval\fR(\fIinterp, clientData, flags\fR) +\fBTcl_CancelEval\fR(\fIinterp, resultObjPtr, clientData, flags\fR) .sp int \fBTcl_Canceled\fR(\fIinterp, flags\fR) .SH ARGUMENTS +.AS Tcl_Interp *interp .AP Tcl_Interp *interp in Interpreter in which to cancel the script. +.AP Tcl_Obj *resultObjPtr in +Error message to use in the cancellation, or NULL to use a default message. If +not NULL, this object will have its reference count decremented before +\fBTcl_CancelEval\fR returns. .AP int flags in ORed combination of flag bits that specify additional options. For \fBTcl_CancelEval\fR, only \fBTCL_CANCEL_UNWIND\fR is currently supported. For \fBTcl_Canceled\fR, only \fBTCL_LEAVE_ERR_MSG\fR and \fBTCL_CANCEL_UNWIND\fR are currently supported. .AP ClientData clientData in -Currently, reserved for future use. +Currently reserved for future use. It should be set to NULL. .BE .SH DESCRIPTION @@ -41,19 +46,21 @@ returns \fBTCL_ERROR\fR if it has. Otherwise, \fBTCL_OK\fR is returned. Extensions can use this function to check to see if they should abort a long running command. This function is thread sensitive and may only be called from the thread the interpreter was created in. -.SH "FLAG BITS" +.SS "FLAG BITS" Any ORed combination of the following values may be used for the \fIflags\fR argument to procedures such as \fBTcl_CancelEval\fR: -.TP 23 +.TP 20 \fBTCL_CANCEL_UNWIND\fR +. This flag is used by \fBTcl_CancelEval\fR and \fBTcl_Canceled\fR. For \fBTcl_CancelEval\fR, if this flag is set, the script in progress is canceled and the evaluation stack for the interpreter is unwound. For \fBTcl_Canceled\fR, if this flag is set, the script in progress is considered to be canceled only if the evaluation stack for the interpreter is being unwound. -.TP 23 +.TP 20 \fBTCL_LEAVE_ERR_MSG\fR +. This flag is only used by \fBTcl_Canceled\fR; it is ignored by other procedures. If an error is returned and this bit is set in \fIflags\fR, then an error message will be left in the interpreter's @@ -61,6 +68,7 @@ result, where it can be retrieved with \fBTcl_GetObjResult\fR or \fBTcl_GetStringResult\fR. If this flag bit is not set then no error message is left and the interpreter's result will not be modified. .SH "SEE ALSO" +interp(n), Tcl_Eval(3), TIP 285 .SH KEYWORDS cancel, unwind |