1Tcl_CreateCloseHandler(3) Tcl Library Procedures Tcl_CreateCloseHandler(3)
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8 Tcl_CreateCloseHandler, Tcl_DeleteCloseHandler - arrange for callbacks
9 when channels are closed
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12 #include <tcl.h>
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14 void
15 Tcl_CreateCloseHandler(channel, proc, clientData)
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17 void
18 Tcl_DeleteCloseHandler(channel, proc, clientData)
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22 Tcl_Channel channel (in) The channel for which to create
23 or delete a close callback.
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25 Tcl_CloseProc *proc (in) The procedure to call as the
26 callback.
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28 ClientData clientData (in) Arbitrary one-word value to pass
29 to proc.
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33 Tcl_CreateCloseHandler arranges for proc to be called when channel is
34 closed with Tcl_Close or Tcl_UnregisterChannel, or using the Tcl close
35 command. Proc should match the following prototype:
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37 typedef void Tcl_CloseProc(
38 ClientData clientData);
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40 The clientData is the same as the value provided in the call to
41 Tcl_CreateCloseHandler.
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43 Tcl_DeleteCloseHandler removes a close callback for channel. The proc
44 and clientData identify which close callback to remove; Tcl_Deleteā
45 CloseHandler does nothing if its proc and clientData arguments do not
46 match the proc and clientData for a close handler for channel.
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49 close(n), Tcl_Close(3), Tcl_UnregisterChannel(3)
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52 callback, channel closing
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56Tcl 7.5 Tcl_CreateCloseHandler(3)