watchdog.h File Reference

Declare SIGALRM/Watchdog for Windows/Linux. More...

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Functions
ctl_watchdog_handler	ctl_watchdog_init (ctl_watchdog_handler handler)
void	ctl_watchdog_kick (int milliseconds)

---

Detailed Description

Declare SIGALRM/Watchdog for Windows/Linux.

Author:

David Mace

Definition in file watchdog.h.

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Function Documentation

ctl_watchdog_handler ctl_watchdog_init

(

ctl_watchdog_handler

handler

)

Initialize the watchdog; you have one minute to kick it

Parameters:

handler

Watchdog handler callback to call when 'kick' doesn't happen

Returns:

Old handler, if any

Definition at line 59 of file watchdog.c.

References assertcodeptr, and ctl_mstime().

{
    ctl_watchdog_handler old = wd_handler;
    wd_handler = NULL == handler ? ctl_watchdog_handler_default : handler;
    assertcodeptr(wd_handler);
#ifdef WIN32
    msexpire = ctl_mstime() + 60000;
    hSleepy = CreateEvent( NULL, FALSE, FALSE, NULL );
    hThread = (HANDLE)_beginthread( WatchdogThreadProc, 0, NULL );
#else
    {   /* Assume POSIX */
        struct sigaction action;
        action.sa_handler = sigalrm_callback;
        sigemptyset(&action.sa_mask);
        action.sa_flags = 0;
        /* alarm() is our watchdog */
        sigaction(SIGALRM, &action, NULL);
    }
    alarm(60);
#endif
    return old;
}

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void ctl_watchdog_kick

(

int

milliseconds

)

Initialize the watchdog

Parameters:

milliseconds

How long until watchdog callback is triggered We only have second precision, but it gets confusing consistently dealing with milliseconds in other places

Definition at line 87 of file watchdog.c.

References ctl_mstime().

{
#ifdef WIN32
    msexpire = ctl_mstime() + milliseconds;
    SetEvent( hSleepy );
#else
    alarm((milliseconds+999)/1000);
#endif
}

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