SysTime.h

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/*
 * Copyright 2016-present Facebook, Inc.
 *
 * 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.
 */

#pragma once

#ifndef _WIN32
#include <sys/time.h>
#else
// Someone decided this was a good place to define timeval.....
#include <folly/portability/Windows.h>
struct timezone {
  int tz_minuteswest;
  int tz_dsttime;
};

extern "C" {
// Note that this needs to explicitly be `struct timezone` due to the fact that
// the python 3 headers `#define timezone _timezone` on Windows. `_timezone` is
// a global field that contains information on the current timezone. By
// explicitly specifying that this is a `struct`, we ensure that it's treated as
// a type, regardless of what name that type actually is :)
// Note that this will break if `gettimeofday` ever becomes declared as anything
// other than `extern "C"`, as the mangled name would be dependent on whether
// python had been included before this header.
int gettimeofday(timeval* tv, struct timezone*);
void timeradd(timeval* a, timeval* b, timeval* res);
void timersub(timeval* a, timeval* b, timeval* res);
}
#endif