posix_types.h
上传用户:szlgq88
上传日期:2009-04-28
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文件大小:1k
- #ifndef _LINUX_POSIX_TYPES_H
- #define _LINUX_POSIX_TYPES_H
- #include <linux/stddef.h>
- /*
- * This allows for 1024 file descriptors: if NR_OPEN is ever grown
- * beyond that you'll have to change this too. But 1024 fd's seem to be
- * enough even for such "real" unices like OSF/1, so hopefully this is
- * one limit that doesn't have to be changed [again].
- *
- * Note that POSIX wants the FD_CLEAR(fd,fdsetp) defines to be in
- * <sys/time.h> (and thus <linux/time.h>) - but this is a more logical
- * place for them. Solved by having dummy defines in <sys/time.h>.
- */
- /*
- * Those macros may have been defined in <gnu/types.h>. But we always
- * use the ones here.
- */
- #undef __NFDBITS
- #define __NFDBITS (8 * sizeof(unsigned long))
- #undef __FD_SETSIZE
- #define __FD_SETSIZE 1024
- #undef __FDSET_LONGS
- #define __FDSET_LONGS (__FD_SETSIZE/__NFDBITS)
- #undef __FDELT
- #define __FDELT(d) ((d) / __NFDBITS)
- #undef __FDMASK
- #define __FDMASK(d) (1UL << ((d) % __NFDBITS))
- typedef struct {
- unsigned long fds_bits [__FDSET_LONGS];
- } __kernel_fd_set;
- /* Type of a signal handler. */
- typedef void (*__kernel_sighandler_t)(int);
- /* Type of a SYSV IPC key. */
- typedef int __kernel_key_t;
- typedef int __kernel_mqd_t;
- #include <asm/posix_types.h>
- #endif /* _LINUX_POSIX_TYPES_H */