目前linux的系统调用中没有可以有效获得当前进程打开的所有文件标识符的函数。所以我实现了nextfd,findfd系统调用，使用bitmap高效率实现。-Linux system calls can access the function of all open files in the current process identifier. So I achieve a nextfd of findfd system calls, the use of bitmap high efficie

Theory of Operation: A cog is launched which processes commands via the PUB routines. Points, lines, arcs, sprites, text, and polygons are rasterized into a specified stretch of memory which serves as a generic bitmap buffer.