38     int m_writeFd;  member in Pipe
44     Pipe(int readFd, int writeFd) : m_readFd{readFd}, m_writeFd{writeFd} {  in Pipe()
46         fcntl(m_writeFd, F_SETFD, FD_CLOEXEC);
50         m_writeFd = rval.m_writeFd;  in Pipe()
52         rval.m_writeFd = 0;  in Pipe()
56         if (m_writeFd) close(m_writeFd);  in ~Pipe()
61             fcntl(m_writeFd, F_SETFD, 0);  in preserveOverFork()
64             fcntl(m_writeFd, F_SETFD, FD_CLOEXEC);  in preserveOverFork()
68     int getWriteFd() { return m_writeFd; }  in getWriteFd()
71         int error = write(m_writeFd, &val, sizeof(val));  in signal()
86         int error = write(m_writeFd, &v, sizeof(T));  in send()