API for file descriptor set

Macros
#define	FD_ZERO(set)   (*(set) = 0)
#define	FD_SET(fd, set)   (*(set) |= (1u << (fd)))
#define	FD_CLR(fd, set)   (*(set) &= ~(1u << (fd)))
#define	FD_ISSET(fd, set)   (*(set) & (1u << (fd)))
#define	FD_SETSIZE   sizeof(fd_set)

Typedefs
typedef uint32_t	fd_set

Detailed Description

File descriptor sets are used as input to the select() function for doing I/O multiplexing. The maximum number of descriptors contained in a set is defined by FD_SETSIZE.

Macro Definition Documentation

#define FD_CLR	(		fd,
			set
	)		(*(set) &= ~(1u << (fd)))

Clear a bit in the set.

#define FD_ISSET	(		fd,
			set
	)		(*(set) & (1u << (fd)))

Check if a bit in the set is set.

#define FD_SET	(		fd,
			set
	)		(*(set) |= (1u << (fd)))

Set a bit in the set.

#define FD_SETSIZE   sizeof(fd_set)

The max size of a set.

#define FD_ZERO

(

set

)

(*(set) = 0)

Clear the entire set.