linux/include/asm-powerpc/posix_types.h

最新推荐文章于 2024-10-06 16:13:27 发布

原创最新推荐文章于 2024-10-06 16:13:27 发布 · 760 阅读

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#types #timer #struct #gcc #file #c

本文档详细介绍了 PowerPC 架构下 Linux 操作系统中 POSIX 类型的定义，包括各种基本类型如 ino_t、mode_t 和高级类型如 fsid_t 的具体实现方式。此外还提供了一些特定于 PowerPC 架构的类型定义。

linux/include/asm-powerpc/posix_types.h

  1 #ifndef _ASM_POWERPC_POSIX_TYPES_H
  2 #define _ASM_POWERPC_POSIX_TYPES_H
  3 
  4 /*
  5  * This file is generally used by user-level software, so you need to
  6  * be a little careful about namespace pollution etc.  Also, we cannot
  7  * assume GCC is being used.
  8  */
  9 
 10 typedef unsigned long   __kernel_ino_t;
 11 typedef unsigned int    __kernel_mode_t;
 12 typedef long            __kernel_off_t;
 13 typedef int             __kernel_pid_t;
 14 typedef unsigned int    __kernel_uid_t;
 15 typedef unsigned int    __kernel_gid_t;
 16 typedef long            __kernel_ptrdiff_t;
 17 typedef long            __kernel_time_t;
 18 typedef long            __kernel_clock_t;
 19 typedef int             __kernel_timer_t;
 20 typedef int             __kernel_clockid_t;
 21 typedef long            __kernel_suseconds_t;
 22 typedef int             __kernel_daddr_t;
 23 typedef char *          __kernel_caddr_t;
 24 typedef unsigned short  __kernel_uid16_t;
 25 typedef unsigned short  __kernel_gid16_t;
 26 typedef unsigned int    __kernel_uid32_t;
 27 typedef unsigned int    __kernel_gid32_t;
 28 typedef unsigned int    __kernel_old_uid_t;
 29 typedef unsigned int    __kernel_old_gid_t;
 30 
 31 #ifdef __powerpc64__
 32 typedef unsigned long   __kernel_nlink_t;
 33 typedef int             __kernel_ipc_pid_t;
 34 typedef unsigned long   __kernel_size_t;
 35 typedef long            __kernel_ssize_t;
 36 typedef unsigned long   __kernel_old_dev_t;
 37 #else
 38 typedef unsigned short  __kernel_nlink_t;
 39 typedef short           __kernel_ipc_pid_t;
 40 typedef unsigned int    __kernel_size_t;
 41 typedef int             __kernel_ssize_t;
 42 typedef unsigned int    __kernel_old_dev_t;
 43 #endif
 44 
 45 #ifdef __powerpc64__
 46 typedef long long       __kernel_loff_t;
 47 #else
 48 #ifdef __GNUC__
 49 typedef long long       __kernel_loff_t;
 50 #endif
 51 #endif
 52 
 53 typedef struct {
 54         int     val[2];
 55 } __kernel_fsid_t;
 56 
 57 #ifndef __GNUC__
 58 
 59 #define __FD_SET(d, set)        ((set)->fds_bits[__FDELT(d)] |= __FDMASK(d))
 60 #define __FD_CLR(d, set)        ((set)->fds_bits[__FDELT(d)] &= ~__FDMASK(d))
 61 #define __FD_ISSET(d, set)      (((set)->fds_bits[__FDELT(d)] & __FDMASK(d)) != 0)
 62 #define __FD_ZERO(set)  /
 63   ((void) memset ((__ptr_t) (set), 0, sizeof (__kernel_fd_set)))
 64 
 65 #else /* __GNUC__ */
 66 
 67 #if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2) /
 68     || (__GLIBC__ == 2 && __GLIBC_MINOR__ == 0)
 69 /* With GNU C, use inline functions instead so args are evaluated only once: */
 70 
 71 #undef __FD_SET
 72 static __inline__ void __FD_SET(unsigned long fd, __kernel_fd_set *fdsetp)
 73 {
 74         unsigned long _tmp = fd / __NFDBITS;
 75         unsigned long _rem = fd % __NFDBITS;
 76         fdsetp->fds_bits[_tmp] |= (1UL<<_rem);
 77 }
 78 
 79 #undef __FD_CLR
 80 static __inline__ void __FD_CLR(unsigned long fd, __kernel_fd_set *fdsetp)
 81 {
 82         unsigned long _tmp = fd / __NFDBITS;
 83         unsigned long _rem = fd % __NFDBITS;
 84         fdsetp->fds_bits[_tmp] &= ~(1UL<<_rem);
 85 }
 86 
 87 #undef __FD_ISSET
 88 static __inline__ int __FD_ISSET(unsigned long fd, __kernel_fd_set *p)
 89 { 
 90         unsigned long _tmp = fd / __NFDBITS;
 91         unsigned long _rem = fd % __NFDBITS;
 92         return (p->fds_bits[_tmp] & (1UL<<_rem)) != 0;
 93 }
 94 
 95 /*
 96  * This will unroll the loop for the normal constant case (8 ints,
 97  * for a 256-bit fd_set)
 98  */
 99 #undef __FD_ZERO
100 static __inline__ void __FD_ZERO(__kernel_fd_set *p)
101 {
102         unsigned long *tmp = (unsigned long *)p->fds_bits;
103         int i;
104 
105         if (__builtin_constant_p(__FDSET_LONGS)) {
106                 switch (__FDSET_LONGS) {
107                       case 16:
108                         tmp[12] = 0; tmp[13] = 0; tmp[14] = 0; tmp[15] = 0;
109                         tmp[ 8] = 0; tmp[ 9] = 0; tmp[10] = 0; tmp[11] = 0;
110 
111                       case 8:
112                         tmp[ 4] = 0; tmp[ 5] = 0; tmp[ 6] = 0; tmp[ 7] = 0;
113 
114                       case 4:
115                         tmp[ 0] = 0; tmp[ 1] = 0; tmp[ 2] = 0; tmp[ 3] = 0;
116                         return;
117                 }
118         }
119         i = __FDSET_LONGS;
120         while (i) {
121                 i--;
122                 *tmp = 0;
123                 tmp++;
124         }
125 }
126 
127 #endif /* defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2) */
128 #endif /* __GNUC__ */
129 #endif /* _ASM_POWERPC_POSIX_TYPES_H */