src/os/posix/vm/os_posix.hpp

*** 87,92 ****
--- 87,108 ----
  private:
    void restore();
    sigjmp_buf _jmpbuf;
  };
  
+ class PosixSemaphore : public Semaphore {
+  public:
+   PosixSemaphore(uint value = 0) : Semaphore(value) {}
+ 
+   bool trywait();
+   bool timedwait(unsigned int sec, int nsec) {
+     return timedwait(create_timespec(sec, nsec));
+   }
+ 
+  private:
+   bool timedwait(struct timespec ts);
+ 
+   // OS specific implementation to create a timespec suitable for semaphores.
+   static struct timespec create_timespec(unsigned int set, int nsec);
+ };
+ 
  #endif // OS_POSIX_VM_OS_POSIX_HPP