41 lines
1.1 KiB
C
Executable file
41 lines
1.1 KiB
C
Executable file
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#ifndef _SYS_SELECT_H
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#define _SYS_SELECT_H 1
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#include <sys/time.h>
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#include <sys/types.h>
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#include <limits.h>
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/* Use this datatype as basic storage unit in fd_set */
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typedef u32_t _fdsetword;
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/* This many bits fit in an fd_set word. */
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#define _FDSETBITSPERWORD (sizeof(_fdsetword)*8)
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/* We want to store OPEN_MAX fd bits. */
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#define _FDSETWORDS ((OPEN_MAX+_FDSETBITSPERWORD-1)/_FDSETBITSPERWORD)
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/* This means we can store all of OPEN_MAX. */
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#define FD_SETSIZE OPEN_MAX
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typedef struct {
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_fdsetword _fdsetval[_FDSETWORDS];
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} fd_set;
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_PROTOTYPE( int select, (int nfds, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct timeval *timeout) );
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_PROTOTYPE( void FD_CLR, (int fd, fd_set *fdset));
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_PROTOTYPE( int FD_ISSET, (int fd, fd_set *fdset));
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_PROTOTYPE( void FD_SET, (int fd, fd_set *fdset));
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_PROTOTYPE( void FD_ZERO, (fd_set *fdset));
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/* possible select() operation types; read, write, errors */
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/* (FS/driver internal use only) */
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#define SEL_RD (1 << 0)
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#define SEL_WR (1 << 1)
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#define SEL_ERR (1 << 2)
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#define SEL_NOTIFY (1 << 3) /* not a real select operation */
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#endif /* _SYS_SELECT_H */
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