sdks/python/apache_beam/runners/worker/crossplatform_unistd.h

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

#ifndef BEAM_CROSSPLATFORM_UNISTD_H
#define BEAM_CROSSPLATFORM_UNISTD_H

#ifdef _WIN32
#include <windows.h>

/**
 * Alternative to POSIX usleep that may be run on Windows platform.
 */
void usleep(__int64 usec) {
    HANDLE timer;
    LARGE_INTEGER timerDueTime;

    // Timer is measuring in 100 of nanoseconds, negative means relative
    timerDueTime.QuadPart = -(10 * usec);

    timer = CreateWaitableTimer(NULL, TRUE, NULL);
    SetWaitableTimer(timer, &timerDueTime, 0, NULL, NULL, 0);
    WaitForSingleObject(timer, INFINITE);
    CloseHandle(timer);
}

#else
#include "unistd.h"
#endif

#endif //BEAM_CROSSPLATFORM_UNISTD_H