redhat man page for tcl_sleep

Tcl_Sleep(3)						      Tcl Library Procedures						      Tcl_Sleep(3)

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NAME
       Tcl_Sleep - delay execution for a given number of milliseconds

SYNOPSIS
       #include <tcl.h>

       Tcl_Sleep(ms)

ARGUMENTS
       int ms (in)	    Number of milliseconds to sleep.
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DESCRIPTION
       This  procedure delays the calling process by the number of milliseconds given by the ms parameter and returns after that time has elapsed.
       It is typically used for things like flashing a button, where the delay is short and the application need not do anything while	it  waits.
       For  longer  delays where the application needs to respond to other events during the delay, the procedure Tcl_CreateTimerHandler should be
       used instead of Tcl_Sleep.

KEYWORDS
       sleep, time, wait

Tcl									7.5							      Tcl_Sleep(3)