roughtime.googlesource.com/roughtime.git@v0.0.0-20201210012726-dd529367052d/sys_time.cc (about)

     1  /* Copyright 2016 The Roughtime Authors.
     2   *
     3   * Licensed under the Apache License, Version 2.0 (the "License");
     4   * you may not use this file except in compliance with the License.
     5   * You may obtain a copy of the License at
     6   *
     7   *   http://www.apache.org/licenses/LICENSE-2.0
     8   *
     9   * Unless required by applicable law or agreed to in writing, software
    10   * distributed under the License is distributed on an "AS IS" BASIS,
    11   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12   * See the License for the specific language governing permissions and
    13   * limitations under the License. */
    14  
    15  #include "sys_time.h"
    16  
    17  #if defined(__MACH__)
    18  #include <sys/time.h>
    19  #else
    20  #include <time.h>
    21  #endif
    22  
    23  #include "logging.h"
    24  
    25  namespace roughtime {
    26  
    27  static const uint32_t kOneSecondRadius = 1000000;
    28  
    29  SystemTimeSource::SystemTimeSource() {}
    30  
    31  SystemTimeSource::~SystemTimeSource() {}
    32  
    33  #if defined(__MACH__)
    34  std::pair<rough_time_t, uint32_t> SystemTimeSource::Now() {
    35    struct timeval tv;
    36    ROUGHTIME_CHECK_EQ(0, gettimeofday(&tv, nullptr));
    37    uint64_t now = tv.tv_sec;
    38    now *= 1000000;
    39    now += tv.tv_usec;
    40  
    41    return std::make_pair(now, kOneSecondRadius);
    42  }
    43  #else
    44  std::pair<rough_time_t, uint32_t> SystemTimeSource::Now() {
    45    struct timespec ts;
    46    ROUGHTIME_CHECK_EQ(0, clock_gettime(CLOCK_REALTIME_COARSE, &ts));
    47    uint64_t now = ts.tv_sec;
    48    now *= 1000000;
    49    now += ts.tv_nsec / 1000;
    50  
    51    return std::make_pair(now, kOneSecondRadius);
    52  }
    53  #endif
    54  
    55  }  // namespace roughtime