1 #include <errno.h> 2 #include <stddef.h> 3 #ifdef _WIN32 4 #include <windows.h> 5 #else 6 #include <sys/select.h> 7 #endif 8 9 // Wait until file descriptor |fd| becomes readable. 10 void yield_until_fd_readable(int fd) { 11 for (;;) { 12 fd_set read_fds; 13 FD_ZERO(&read_fds); 14 FD_SET(fd, &read_fds); 15 int ret = select(fd + 1, &read_fds, NULL, NULL, NULL); 16 if (ret == 1 || (ret < 0 && errno != -EINTR)) 17 return; 18 } 19 } 20 21
