root/include/asm-xtensa/posix_types.h

INCLUDED FROM

DEFINITIONS

1. __FD_SET
2. __FD_CLR
3. __FD_ISSET
4. __FD_ZERO

/*
 * include/asm-xtensa/posix_types.h
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Largely copied from include/asm-ppc/posix_types.h
 *
 * Copyright (C) 2001 - 2005 Tensilica Inc.
 */

#ifndef _XTENSA_POSIX_TYPES_H
#define _XTENSA_POSIX_TYPES_H

/*
 * This file is generally used by user-level software, so you need to
 * be a little careful about namespace pollution etc.  Also, we cannot
 * assume GCC is being used.
 */

typedef unsigned long   __kernel_ino_t;
typedef unsigned int    __kernel_mode_t;
typedef unsigned long   __kernel_nlink_t;
typedef long            __kernel_off_t;
typedef int             __kernel_pid_t;
typedef unsigned short  __kernel_ipc_pid_t;
typedef unsigned int    __kernel_uid_t;
typedef unsigned int    __kernel_gid_t;
typedef unsigned int    __kernel_size_t;
typedef int             __kernel_ssize_t;
typedef long            __kernel_ptrdiff_t;
typedef long            __kernel_time_t;
typedef long            __kernel_suseconds_t;
typedef long            __kernel_clock_t;
typedef int             __kernel_timer_t;
typedef int             __kernel_clockid_t;
typedef int             __kernel_daddr_t;
typedef char *          __kernel_caddr_t;
typedef unsigned short  __kernel_uid16_t;
typedef unsigned short  __kernel_gid16_t;
typedef unsigned int    __kernel_uid32_t;
typedef unsigned int    __kernel_gid32_t;

typedef unsigned short  __kernel_old_uid_t;
typedef unsigned short  __kernel_old_gid_t;
typedef unsigned short  __kernel_old_dev_t;

#ifdef __GNUC__
typedef long long       __kernel_loff_t;
#endif

typedef struct {
        int     val[2];
} __kernel_fsid_t;

#ifndef __GNUC__

#define __FD_SET(d, set)        ((set)->fds_bits[__FDELT(d)] |= __FDMASK(d))
#define __FD_CLR(d, set)        ((set)->fds_bits[__FDELT(d)] &= ~__FDMASK(d))
#define __FD_ISSET(d, set)      ((set)->fds_bits[__FDELT(d)] & __FDMASK(d))
#define __FD_ZERO(set)  \
  ((void) memset ((void *) (set), 0, sizeof (__kernel_fd_set)))

#else /* __GNUC__ */

#if defined(__KERNEL__)
/* With GNU C, use inline functions instead so args are evaluated only once: */

#undef __FD_SET
static __inline__ void __FD_SET(unsigned long fd, __kernel_fd_set *fdsetp)
{
        unsigned long _tmp = fd / __NFDBITS;
        unsigned long _rem = fd % __NFDBITS;
        fdsetp->fds_bits[_tmp] |= (1UL<<_rem);
}

#undef __FD_CLR
static __inline__ void __FD_CLR(unsigned long fd, __kernel_fd_set *fdsetp)
{
        unsigned long _tmp = fd / __NFDBITS;
        unsigned long _rem = fd % __NFDBITS;
        fdsetp->fds_bits[_tmp] &= ~(1UL<<_rem);
}

#undef __FD_ISSET
static __inline__ int __FD_ISSET(unsigned long fd, __kernel_fd_set *p)
{
        unsigned long _tmp = fd / __NFDBITS;
        unsigned long _rem = fd % __NFDBITS;
        return (p->fds_bits[_tmp] & (1UL<<_rem)) != 0;
}

/*
 * This will unroll the loop for the normal constant case (8 ints,
 * for a 256-bit fd_set)
 */
#undef __FD_ZERO
static __inline__ void __FD_ZERO(__kernel_fd_set *p)
{
        unsigned int *tmp = (unsigned int *)p->fds_bits;
        int i;

        if (__builtin_constant_p(__FDSET_LONGS)) {
                switch (__FDSET_LONGS) {
                        case 8:
                                tmp[0] = 0; tmp[1] = 0; tmp[2] = 0; tmp[3] = 0;
                                tmp[4] = 0; tmp[5] = 0; tmp[6] = 0; tmp[7] = 0;
                                return;
                }
        }
        i = __FDSET_LONGS;
        while (i) {
                i--;
                *tmp = 0;
                tmp++;
        }
}

#endif /* defined(__KERNEL__) */
#endif /* __GNUC__ */
#endif /* _XTENSA_POSIX_TYPES_H */