systime.cxx

// dawn/src/io/systime.cxx
//
// SPDX-License-Identifier: Apache-2.0
//
 
#include "dawn/io/systime.hxx"
 
#include <errno.h>
#include <time.h>
 
using namespace dawn;
 
int CIOSystime::init()
{
  return OK;
}
 
int CIOSystime::getDataImpl(IODataCmn &data, size_t len)
{
  struct timespec ts;
  int ret;
 
  if (len != 1)
    {
      return -ENOTSUP;
    }
 
  ret = clock_gettime(CLOCK_REALTIME, &ts);
  if (ret < 0)
    {
      return -errno;
    }
 
  // Return nanoseconds since epoch
 
  uint64_t *time_data = static_cast<uint64_t *>(data.getDataPtr());
  *time_data = static_cast<uint64_t>(ts.tv_sec) * 1000000000ULL + static_cast<uint64_t>(ts.tv_nsec);
 
  return OK;
}
 
int CIOSystime::setDataImpl(IODataCmn &data)
{
  struct timespec ts;
  int ret;
 
  // Set time from nanoseconds since epoch
 
  uint64_t *time_data = static_cast<uint64_t *>(data.getDataPtr());
  ts.tv_sec = static_cast<time_t>(*time_data / 1000000000ULL);
  ts.tv_nsec = static_cast<long>(*time_data % 1000000000ULL);
 
  ret = clock_settime(CLOCK_REALTIME, &ts);
  if (ret < 0)
    {
      return -errno;
    }
 
  return OK;
}
 
size_t CIOSystime::getDataSize() const
{
  return sizeof(uint64_t);
}
 
size_t CIOSystime::getDataDim() const
{
  return 1;
}
 
bool CIOSystime::isRead() const
{
  return true;
}
 
bool CIOSystime::isWrite() const
{
  return true;
}
 
bool CIOSystime::isNotify() const
{
  return false;
}
 
bool CIOSystime::isBatch() const
{
  return false;
}