mirror of
https://github.com/wfjm/w11.git
synced 2026-02-06 08:45:19 +00:00
153 lines
3.8 KiB
C++
153 lines
3.8 KiB
C++
// $Id: RtimerFd.cpp 983 2018-01-02 20:35:59Z mueller $
|
|
//
|
|
// Copyright 2013-2017 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
|
|
//
|
|
// This program is free software; you may redistribute and/or modify it under
|
|
// the terms of the GNU General Public License as published by the Free
|
|
// Software Foundation, either version 3, or (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful, but
|
|
// WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY
|
|
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
// for complete details.
|
|
//
|
|
// Revision History:
|
|
// Date Rev Version Comment
|
|
// 2017-02-18 852 1.0 Initial version
|
|
// 2013-01-11 473 0.1 First draft
|
|
// ---------------------------------------------------------------------------
|
|
|
|
/*!
|
|
\file
|
|
\brief Implemenation of class RtimerFd.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <sys/timerfd.h>
|
|
|
|
#include "RtimerFd.hpp"
|
|
|
|
#include "librtools/Rexception.hpp"
|
|
|
|
using namespace std;
|
|
|
|
/*!
|
|
\class Retro::RtimerFd
|
|
\brief FIXME_docs
|
|
*/
|
|
|
|
// all method definitions in namespace Retro
|
|
namespace Retro {
|
|
|
|
//------------------------------------------+-----------------------------------
|
|
//! FIXME_docs
|
|
|
|
RtimerFd::RtimerFd()
|
|
: fFd(-1)
|
|
{}
|
|
|
|
//------------------------------------------+-----------------------------------
|
|
//! FIXME_docs
|
|
|
|
RtimerFd::~RtimerFd()
|
|
{
|
|
Close();
|
|
}
|
|
|
|
//------------------------------------------+-----------------------------------
|
|
//! FIXME_docs
|
|
|
|
void RtimerFd::Open(clockid_t clkid)
|
|
{
|
|
if (IsOpen())
|
|
throw Rexception("RtimerFd::Open()", "bad state: already open");
|
|
|
|
fFd = ::timerfd_create(clkid, TFD_NONBLOCK);
|
|
if (!IsOpen())
|
|
throw Rexception("RtimerFd::Open()", "timerfd_create() failed: ", errno);
|
|
return;
|
|
}
|
|
|
|
//------------------------------------------+-----------------------------------
|
|
//! FIXME_docs
|
|
|
|
void RtimerFd::Close()
|
|
{
|
|
if (IsOpen()) {
|
|
::close(fFd);
|
|
fFd = -1;
|
|
}
|
|
return;
|
|
}
|
|
|
|
//------------------------------------------+-----------------------------------
|
|
//! FIXME_docs
|
|
|
|
void RtimerFd::SetRelative(const Rtime& dt)
|
|
{
|
|
if (!IsOpen())
|
|
throw Rexception("RtimerFd::SetRelative()", "bad state: not open");
|
|
|
|
if (dt.Sec() <= 0 || dt.NSec() <= 0)
|
|
throw Rexception("RtimerFd::SetRelative()",
|
|
"bad value: dt zero or negative ");
|
|
|
|
struct itimerspec itspec;
|
|
itspec.it_interval.tv_sec = 0;
|
|
itspec.it_interval.tv_nsec = 0;
|
|
itspec.it_value = dt.Timespec();
|
|
|
|
if (::timerfd_settime(fFd, 0, &itspec, nullptr) < 0)
|
|
throw Rexception("RtimerFd::SetRelative()",
|
|
"timerfd_settime() failed: ", errno);
|
|
return;
|
|
}
|
|
|
|
//------------------------------------------+-----------------------------------
|
|
//! FIXME_docs
|
|
|
|
void RtimerFd::Cancel()
|
|
{
|
|
if (!IsOpen())
|
|
throw Rexception("RtimerFd::Cancel()", "bad state: not open");
|
|
|
|
struct itimerspec itspec;
|
|
itspec.it_interval.tv_sec = 0;
|
|
itspec.it_interval.tv_nsec = 0;
|
|
itspec.it_value.tv_sec = 0;
|
|
itspec.it_value.tv_nsec = 0;
|
|
|
|
// cancel running timers
|
|
if (::timerfd_settime(fFd, 0, &itspec, nullptr) < 0)
|
|
throw Rexception("RtimerFd::Cancel()",
|
|
"timerfd_settime() failed: ", errno);
|
|
|
|
// clear aready experied timers
|
|
uint64_t cnt;
|
|
int irc = ::read(fFd, &cnt, sizeof(cnt));
|
|
if (irc < 0 && errno != EAGAIN)
|
|
throw Rexception("RtimerFd::Cancel()", "read() failed: ", errno);
|
|
|
|
return;
|
|
}
|
|
|
|
//------------------------------------------+-----------------------------------
|
|
//! FIXME_docs
|
|
|
|
uint64_t RtimerFd::Read()
|
|
{
|
|
if (!IsOpen())
|
|
throw Rexception("RtimerFd::Read()", "bad state: not open");
|
|
|
|
uint64_t cnt;
|
|
int irc = ::read(fFd, &cnt, sizeof(cnt));
|
|
if (irc < 0) {
|
|
if (errno == EAGAIN) return 0;
|
|
throw Rexception("RtimerFd::Read()", "read() failed: ", errno);
|
|
}
|
|
return cnt;
|
|
}
|
|
|
|
} // end namespace Retro
|