55 lines
1 KiB
C
Executable file
55 lines
1 KiB
C
Executable file
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#include <lib.h>
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#include <sys/select.h>
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PUBLIC int select(int nfds,
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fd_set *readfds, fd_set *writefds, fd_set *errorfds,
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struct timeval *timeout)
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{
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message m;
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m.SEL_NFDS = nfds;
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m.SEL_READFDS = (char *) readfds;
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m.SEL_WRITEFDS = (char *) writefds;
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m.SEL_ERRORFDS = (char *) errorfds;
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m.SEL_TIMEOUT = (char *) timeout;
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return (_syscall(FS, SELECT, &m));
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}
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#define FD_BITMASK(b) (1L << ((b) % _FDSETBITSPERWORD))
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#define FD_BITWORD(b) ((b)/_FDSETBITSPERWORD)
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PUBLIC void FD_CLR(int fd, fd_set *fdset)
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{
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if(fd < 0 || fd >= FD_SETSIZE) return;
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fdset->_fdsetval[FD_BITWORD(fd)] &= ~(FD_BITMASK(fd));
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return;
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}
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PUBLIC int FD_ISSET(int fd, fd_set *fdset)
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{
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if(fd < 0 || fd >= FD_SETSIZE)
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return 0;
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if(fdset->_fdsetval[FD_BITWORD(fd)] & FD_BITMASK(fd))
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return 1;
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return 0;
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}
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PUBLIC void FD_SET(int fd, fd_set *fdset)
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{
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if(fd < 0 || fd >= FD_SETSIZE)
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return;
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fdset->_fdsetval[FD_BITWORD(fd)] |= FD_BITMASK(fd);
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return;
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}
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PUBLIC void FD_ZERO(fd_set *fdset)
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{
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int i;
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for(i = 0; i < _FDSETWORDS; i++)
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fdset->_fdsetval[i] = 0;
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return;
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}
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