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Comparing libeio/eio.h (file contents):
Revision 1.15 by root, Tue Jun 17 23:58:48 2008 UTC vs.
Revision 1.20 by root, Sat Jun 6 18:06:55 2009 UTC

1/* 1/*
2 * libeio API header 2 * libeio API header
3 * 3 *
4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libeio@schmorp.de> 4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libeio@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
… …
45#endif 45#endif
46 46
47#include <stddef.h> 47#include <stddef.h>
48#include <sys/types.h> 48#include <sys/types.h>
49 49
50typedef struct eio_req eio_req; 50typedef struct eio_req eio_req;
51typedef struct eio_dirent eio_dirent;
51 52
52typedef int (*eio_cb)(eio_req *req); 53typedef int (*eio_cb)(eio_req *req);
53 54
54#ifndef EIO_REQ_MEMBERS 55#ifndef EIO_REQ_MEMBERS
55# define EIO_REQ_MEMBERS 56# define EIO_REQ_MEMBERS
… …
57 58
58#ifndef EIO_STRUCT_STAT 59#ifndef EIO_STRUCT_STAT
59# define EIO_STRUCT_STAT struct stat 60# define EIO_STRUCT_STAT struct stat
60#endif 61#endif
61 62
63/* for readdir */
64
65/* eio_readdir flags */
62enum { 66enum {
67 EIO_READDIR_DENTS = 0x01, /* ptr2 contains eio_dirents, not just the (unsorted) names */
68 EIO_READDIR_DIRS_FIRST = 0x02, /* dirents gets sorted into a good stat() ing order to find directories first */
69 EIO_READDIR_STAT_ORDER = 0x04, /* dirents gets sorted into a good stat() ing order to quickly stat all files */
70 EIO_READDIR_FOUND_UNKNOWN = 0x80, /* set by eio_readdir when *_ARRAY was set and any TYPE=UNKNOWN's were found */
71
72 EIO_READDIR_CUSTOM1 = 0x100, /* for use by apps */
73 EIO_READDIR_CUSTOM2 = 0x200 /* for use by apps */
74};
75
76/* using "typical" values in the hope that the compiler will do something sensible */
77enum eio_dtype {
78 EIO_DT_UNKNOWN = 0,
79 EIO_DT_FIFO = 1,
80 EIO_DT_CHR = 2,
81 EIO_DT_DIR = 4,
82 EIO_DT_BLK = 6,
83 EIO_DT_REG = 8,
84 EIO_DT_LNK = 10,
85 EIO_DT_SOCK = 12,
86 EIO_DT_WHT = 14,
87 EIO_DT_MAX = 15 /* highest DT_VALUE ever, hopefully */
88};
89
90struct eio_dirent {
91 char *name;
92 ino_t inode;
93 unsigned short namelen;
94 unsigned char type;
95 unsigned char score; /* internal use */
96 /* 0-4 bytes padding */
97};
98
99/* eio_sync_file_range flags */
100
101enum {
102 EIO_SYNC_FILE_RANGE_WAIT_BEFORE = 1,
103 EIO_SYNC_FILE_RANGE_WRITE = 2,
104 EIO_SYNC_FILE_RANGE_WAIT_AFTER = 4
105};
106
107typedef double eio_tstamp; /* feel free to use double in your code directly */
108
109/* the eio request structure */
110
111enum {
112 EIO_CUSTOM,
63 EIO_OPEN, EIO_CLOSE, EIO_DUP2, 113 EIO_OPEN, EIO_CLOSE, EIO_DUP2,
64 EIO_READ, EIO_WRITE, 114 EIO_READ, EIO_WRITE,
65 EIO_READAHEAD, EIO_SENDFILE, 115 EIO_READAHEAD, EIO_SENDFILE,
66 EIO_STAT, EIO_LSTAT, EIO_FSTAT, 116 EIO_STAT, EIO_LSTAT, EIO_FSTAT,
67 EIO_TRUNCATE, EIO_FTRUNCATE, 117 EIO_TRUNCATE, EIO_FTRUNCATE,
68 EIO_UTIME, EIO_FUTIME, 118 EIO_UTIME, EIO_FUTIME,
69 EIO_CHMOD, EIO_FCHMOD, 119 EIO_CHMOD, EIO_FCHMOD,
70 EIO_CHOWN, EIO_FCHOWN, 120 EIO_CHOWN, EIO_FCHOWN,
71 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, 121 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC,
122 EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE,
72 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, 123 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME,
73 EIO_MKNOD, EIO_READDIR, 124 EIO_MKNOD, EIO_READDIR,
74 EIO_LINK, EIO_SYMLINK, EIO_READLINK, 125 EIO_LINK, EIO_SYMLINK, EIO_READLINK,
75 EIO_GROUP, EIO_NOP, 126 EIO_GROUP, EIO_NOP,
76 EIO_BUSY, EIO_CUSTOM 127 EIO_BUSY
77}; 128};
78
79typedef double eio_tstamp; /* feel free to use double in your code directly */
80 129
81/* eio request structure */ 130/* eio request structure */
82/* this structure is mostly read-only */ 131/* this structure is mostly read-only */
132/* when initialising it, all members must be zero-initialised */
83struct eio_req 133struct eio_req
84{ 134{
85 eio_req volatile *next; /* private ETP */ 135 eio_req volatile *next; /* private ETP */
86 136
87 ssize_t result; /* result of syscall, e.g. result = read (... */ 137 ssize_t result; /* result of syscall, e.g. result = read (... */
88 off_t offs; /* read, write, truncate, readahead: file offset */ 138 off_t offs; /* read, write, truncate, readahead, sync_file_range: file offset */
89 size_t size; /* read, write, readahead, sendfile: length */ 139 size_t size; /* read, write, readahead, sendfile, msync, sync_file_range: length */
90 void *ptr1; /* all applicable requests: pathname, old name */ 140 void *ptr1; /* all applicable requests: pathname, old name; readdir: possible output memory buffer */
91 void *ptr2; /* all applicable requests: new name or memory buffer */ 141 void *ptr2; /* all applicable requests: new name or memory buffer */
92 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ 142 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */
93 eio_tstamp nv2; /* utime, futime: mtime */ 143 eio_tstamp nv2; /* utime, futime: mtime */
94 144
95 int type; /* EIO_xxx constant ETP */ 145 int type; /* EIO_xxx constant ETP */
96 int int1; /* all applicable requests: file descriptor; sendfile: output fd; open: flags */ 146 int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, readdir: flags */
97 long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode */ 147 long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, sync_file_range: flags */
98 long int3; /* chown, fchown: gid; mknod: dev_t */ 148 long int3; /* chown, fchown: gid; mknod: dev_t */
99 int errorno; /* errno value on syscall return */ 149 int errorno; /* errno value on syscall return */
100 150
101 unsigned char flags; /* private */ 151 unsigned char flags; /* private */
102 signed char pri; /* the priority */ 152 signed char pri; /* the priority */
… …
109 EIO_REQ_MEMBERS 159 EIO_REQ_MEMBERS
110 160
111 eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ 161 eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */
112}; 162};
113 163
164/* _private_ flags */
114enum { 165enum {
115 EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ 166 EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */
116 EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */ 167 EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */
117 EIO_FLAG_PTR2_FREE = 0x04 /* need to free(ptr2) */ 168 EIO_FLAG_PTR2_FREE = 0x04, /* need to free(ptr2) */
169 EIO_FLAG_GROUPADD = 0x08 /* some request was added to the group */
118}; 170};
119 171
120enum { 172enum {
121 EIO_PRI_MIN = -4, 173 EIO_PRI_MIN = -4,
122 EIO_PRI_MAX = 4, 174 EIO_PRI_MAX = 4,
… …
158eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ 210eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */
159eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ 211eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */
160eio_req *eio_sync (int pri, eio_cb cb, void *data); 212eio_req *eio_sync (int pri, eio_cb cb, void *data);
161eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); 213eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data);
162eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); 214eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data);
215eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data);
216eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data);
217eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data);
163eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); 218eio_req *eio_close (int fd, int pri, eio_cb cb, void *data);
164eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); 219eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data);
165eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); 220eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
166eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); 221eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
167eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 222eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
… …
175eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); 230eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data);
176eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data); 231eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data);
177eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); 232eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data);
178eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data); 233eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data);
179eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data); 234eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data);
180eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ 235eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */
181eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data); 236eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data);
182eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data); 237eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data);
183eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ 238eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */
184eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 239eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
185eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 240eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */

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