SysUtil Class Reference
[Utils]

#include <SysUtil.h>

List of all members.

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Detailed Description

System utility class for sleeping, selecting, and installing signal handlers.

Definition at line 63 of file SysUtil.h.

Static Public Member Functions
static int	select (int max=0, fd_set *rfs=0, fd_set *wfs=0, fd_set *efs=0, struct timeval *timeout=0, bool restartOnEINTR=true)
	Call system select with various sets.
static int	select (int max, fd_set *rfs, fd_set *wfs, fd_set *efs, uint64_t timeout, bool restartOnEINTR=true)
	constructs a timeval, and calls select(int, fd_set*, fd_set*, fd_set*, struct timeval*, bool)
static sighandler_t	signal (int signum, sighandler_t handler, bool warn=true)
	Install signal handler handler for signum, warn on duplicate if warn.
static void	sleep (time_t sec=0, useconds_t usec=0)
	Sleep an optional number of seconds and (< 1000000) microsecods (0 means infinite).
static void	sleepu (uint64_t usec)
	Sleep a number of microseconds (0 means infinite).
static void	sleepm (useconds_t msec)
	Sleep a number of milliseconds (0 means infinite).

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Member Function Documentation

int SysUtil::select	(	int	max = 0,
		fd_set *	rfs = 0,
		fd_set *	wfs = 0,
		fd_set *	efs = 0,
		struct timeval *	timeout = 0,
		bool	restartOnEINTR = true
	)			[static]

Call system select with various sets.

Note about Windows implementation: in the Winsock API, it is invalid to use select to sleep only (without passing in any file descriptors). On Windows, if max is 0, the implementation calls OS sleep instead.

Parameters:

	max	the largest file descriptor (plus one)
	rfs	the read fd_set (set of fds to wait for readability)
	wfs	the write fd_set (set of fds to wait for writability)
	efs	the error fd_set (set of fds to wait for error signals)
	timeout	the timeout for select (0 means forever)
	restartOnEINTR	whether to restart the sleep if the sleep is interrupted

Returns:

the number of file descriptors in the output fd_sets.

Definition at line 53 of file SysUtil.cc.

References ABORT, Log::err(), SockUtil::errorBadF(), SockUtil::errorInterrupted(), TimeUtil::fillTimeval(), SockUtil::getErrno(), Log::perror(), TimeUtil::timeu(), and Log::warn().

Referenced by select(), sleep(), and PipedSignal::wait().

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The documentation for this class was generated from the following files:

• /home/elb/work/cs590n/mace/mace/lib/SysUtil.h
• /home/elb/work/cs590n/mace/mace/lib/SysUtil.cc