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// Module: Log4CPLUS
// File: sleep.cxx
// Created: 5/2003
// Author: Tad E. Smith
//
//
// Copyright 2003-2010 Tad E. Smith
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "dcmtk/oflog/config/windowsh.h"
#include "dcmtk/oflog/helpers/sleep.h"
#include "dcmtk/oflog/helpers/timehelp.h"
#include <cerrno>
#if defined (DCMTK_LOG4CPLUS_HAVE_ERRNO_H)
#include <errno.h>
#endif
#if defined (DCMTK_LOG4CPLUS_HAVE_TIME_H)
#include <time.h>
#endif
namespace dcmtk {
namespace log4cplus { namespace helpers {
///////////////////////////////////////////////////////////////////////////////
// public methods
///////////////////////////////////////////////////////////////////////////////
int const MILLIS_TO_NANOS = 1000000;
int const SEC_TO_MILLIS = 1000;
#if ! defined (_WIN32)
static inline
int
unix_nanosleep (const struct timespec *req, struct timespec *rem)
{
#if defined (DCMTK_LOG4CPLUS_HAVE_CLOCK_NANOSLEEP)
return clock_nanosleep (CLOCK_REALTIME, 0, req, rem);
#elif defined (DCMTK_LOG4CPLUS_HAVE_NANOSLEEP)
return nanosleep (req, rem);
#else
# error no nanosleep() or clock_nanosleep()
#endif
}
#endif
void
sleep(unsigned long secs, unsigned long nanosecs)
{
#if defined(_WIN32)
DWORD const MAX_SLEEP_SECONDS = 4294966; // (2**32-2)/1000
DWORD nano_millis = nanosecs / OFstatic_cast(unsigned long, MILLIS_TO_NANOS);
if (secs <= MAX_SLEEP_SECONDS) {
Sleep((secs * SEC_TO_MILLIS) + nano_millis);
return;
}
DWORD no_of_max_sleeps = secs / MAX_SLEEP_SECONDS;
for(DWORD i = 0; i < no_of_max_sleeps; i++) {
Sleep(MAX_SLEEP_SECONDS * SEC_TO_MILLIS);
}
Sleep((secs % MAX_SLEEP_SECONDS) * SEC_TO_MILLIS + nano_millis);
#else
timespec sleep_time = { OFstatic_cast(STD_NAMESPACE time_t, secs),
OFstatic_cast(long, nanosecs) };
timespec remain;
while (unix_nanosleep (&sleep_time, &remain)) {
if (errno == EINTR) {
sleep_time.tv_sec = remain.tv_sec;
sleep_time.tv_nsec = remain.tv_nsec;
continue;
}
else {
return;
}
}
#endif
}
void
sleepmillis(unsigned long millis)
{
unsigned long secs = millis / SEC_TO_MILLIS;
unsigned long nanosecs = (millis % SEC_TO_MILLIS) * MILLIS_TO_NANOS;
sleep(secs, nanosecs);
}
} } // namespace log4cplus { namespace helpers {
} // end namespace dcmtk
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