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Cross platform named mutex which provide a system-wide mutex synchronization primitive

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package io.github.hcoona.concurrent;

import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import com.sun.jna.ptr.IntByReference;

import java.util.Arrays;
import java.util.List;

interface Pthread extends Library {
  Pthread INSTANCE = Native.loadLibrary("pthread", Pthread.class);

  int pthread_self();

  Pointer sem_open(String name, int oflag);

  Pointer sem_open(String name, int oflag, int mode, int value);

  int sem_wait(Pointer sem);

  int sem_trywait(Pointer sem);

  class TimeSpec extends Structure {
    public long tv_sec;
    public long tv_nsec;

    public TimeSpec(long seconds, long nanoseconds) {
      this.tv_sec = seconds;
      this.tv_nsec = nanoseconds;
    }

    @Override
    protected List getFieldOrder() {
      return Arrays.asList("tv_sec", "tv_nsec");
    }
  }

  class TimeSpecByReference extends TimeSpec implements Structure.ByReference {
    public TimeSpecByReference(long seconds, long nanoseconds) {
      super(seconds, nanoseconds);
    }
  }

  int sem_timedwait(Pointer sem, TimeSpecByReference abs_timeout);

  int sem_post(Pointer sem);

  int sem_getvalue(Pointer sem, IntByReference sval);

  int sem_destroy(Pointer sem);

  int sem_close(Pointer sem);

  int sem_unlink(String name);
}