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Tcl_CreateCloseHandler, Tcl_DeleteCloseHandler ? arrange for callbacks when channels are closed |
#include <tcl.h> void Tcl_CreateCloseHandler(channel, proc, clientData) void Tcl_DeleteCloseHandler(channel, proc, clientData) |
Tcl_Channel channel (in)
The channel for which to create or delete a close callback.
Tcl_CloseProc *proc (in)
The procedure to call as the callback.
ClientData clientData (in)
Arbitrary one-word value to pass to proc.
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Tcl_CreateCloseHandler arranges for proc to be called when channel is closed with Tcl_Close or Tcl_UnregisterChannel, or using the Tcl close command. Proc should match the following prototype: |
typedef void Tcl_CloseProc( |
ClientData clientData); |
The clientData is the same as the value provided in the call to Tcl_CreateCloseHandler. Tcl_DeleteCloseHandler removes a close callback for channel. The proc and clientData identify which close callback to remove; Tcl_DeleteCloseHandler does nothing if its proc and clientData arguments do not match the proc and clientData for a close handler for channel. |
close(n), Tcl_Close(3), Tcl_UnregisterChannel(3) |
callback, channel closing |