/usr/include/wvstreams/wvtimestream.h is in libwvstreams-dev 4.6.1-7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | /* -*- Mode: C++ -*-
* Worldvisions Weaver Software:
* Copyright (C) 1997-2002 Net Integration Technologies, Inc.
*
*/
#ifndef __WVTIMESTREAM_H
#define __WVTIMESTREAM_H
#include "wvtimeutils.h"
#include "wvstream.h"
/**
* WvTimeStream causes select() to be true after a configurable number
* of milliseconds. Because programs using WvStream make no guarantees
* about how often select() will be called, WvTimeStream tries to adjust
* its timing to a correct _average_ number of milliseconds per tick.
*
* For example, if ms_per_tick=100, WvTimeStream will tick 10 times in one
* second. However, there may be a few milliseconds of difference
* ("jitter") for each individual tick, due to random system delays.
*/
class WvTimeStream : public WvStream
{
WvTime last;
WvTime next;
time_t ms_per_tick;
public:
WvTimeStream();
/**
* Every 'msec' milliseconds, select() will return true on this
* stream. if 'msec' is 0 (or less), the timer is disabled.
*
* Be careful when mixing alarm() with this. You can know whether
* it was the alarm or if you had a timer event by looking at
* alarm_was_ticking. But the alarm() has priority, so if there's
* always an alarm, the timer event never gets to run. Calling
* alarm(0) in the callback unconditionally would thus be a bad
* idea, or even with an unsuitably small number (say, less than
* the time it takes to go back into select()). So don't do it.
*/
void set_timer(time_t msec);
virtual bool isok() const;
virtual void pre_select(SelectInfo &si);
virtual bool post_select(SelectInfo &si);
virtual void execute();
public:
const char *wstype() const { return "WvTimeStream"; }
};
#endif // __WVTIMESTREAM_H
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