1 | #ifndef EIO_H_ |
1 | #ifndef EIO_H_ |
2 | #define EIO_H_ |
2 | #define EIO_H_ |
3 | |
3 | |
4 | #include <stddef.h> |
4 | #include <stddef.h> |
5 | #include <stdlib.h> |
5 | #include <sys/types.h> |
6 | |
6 | |
7 | typedef struct eio_req eio_req; |
7 | typedef struct eio_req eio_req; |
8 | |
8 | |
9 | typedef int (*eio_cb)(eio_req *req); |
9 | typedef int (*eio_cb)(eio_req *req); |
10 | |
10 | |
11 | #ifndef EIO_COMMON |
11 | #ifndef EIO_COMMON |
12 | # define EIO_COMMON \ |
12 | # define EIO_COMMON void *data |
13 | eio_cb finish; \ |
13 | #endif |
14 | void (*destroy)(eio_req *req);\ |
14 | |
15 | void *data |
15 | #ifndef EIO_STRUCT_STAT |
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16 | # define EIO_STRUCT_STAT struct stat |
16 | #endif |
17 | #endif |
17 | |
18 | |
18 | enum { |
19 | enum { |
19 | EIO_QUIT, |
20 | EIO_QUIT, |
20 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
21 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
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56 | int errorno; /* errno value on syscall return */ |
57 | int errorno; /* errno value on syscall return */ |
57 | |
58 | |
58 | unsigned char flags; /* private */ |
59 | unsigned char flags; /* private */ |
59 | unsigned char pri; /* the priority */ |
60 | unsigned char pri; /* the priority */ |
60 | |
61 | |
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62 | eio_cb finish; |
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63 | void (*destroy)(eio_req *req); |
61 | void (*feed)(eio_req *req); |
64 | void (*feed)(eio_req *req); |
62 | |
65 | |
63 | EIO_COMMON; |
66 | EIO_COMMON; |
64 | |
67 | |
65 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ |
68 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ |
66 | }; |
69 | }; |
67 | |
70 | |
68 | enum { |
71 | enum { |
69 | EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ |
72 | EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ |
70 | EIO_FLAG_PTR2_FREE = 0x02, /* need to free(ptr2) */ |
73 | EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */ |
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74 | EIO_FLAG_PTR2_FREE = 0x04 /* need to free(ptr2) */ |
71 | }; |
75 | }; |
72 | |
76 | |
73 | enum { |
77 | enum { |
74 | EIO_PRI_MIN = -4, |
78 | EIO_PRI_MIN = -4, |
75 | EIO_PRI_MAX = 4, |
79 | EIO_PRI_MAX = 4, |
76 | |
80 | |
77 | EIO_DEFAULT_PRI = 0, |
81 | EIO_DEFAULT_PRI = 0, |
78 | EIO_PRI_BIAS = -EIO_PRI_MIN, |
82 | EIO_PRI_BIAS = -EIO_PRI_MIN, |
79 | EIO_NUM_PRI = EIO_PRI_MAX + EIO_PRI_BIAS + 1, |
83 | EIO_NUM_PRI = EIO_PRI_MAX + EIO_PRI_BIAS + 1 |
80 | }; |
84 | }; |
81 | |
85 | |
82 | /* returns < 0 on error, errno set |
86 | /* returns < 0 on error, errno set |
83 | * need_poll, if non-zero, will be called when results are available |
87 | * need_poll, if non-zero, will be called when results are available |
84 | * and eio_poll_cb needs to be invoked (it MUST NOT call eio_poll_cb itself). |
88 | * and eio_poll_cb needs to be invoked (it MUST NOT call eio_poll_cb itself). |
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92 | |
96 | |
93 | /* stop polling if poll took longer than duration seconds */ |
97 | /* stop polling if poll took longer than duration seconds */ |
94 | void eio_set_max_poll_time (eio_tstamp nseconds); |
98 | void eio_set_max_poll_time (eio_tstamp nseconds); |
95 | /* do not handle more then count requests in one call to eio_poll_cb */ |
99 | /* do not handle more then count requests in one call to eio_poll_cb */ |
96 | void eio_set_max_poll_reqs (unsigned int nreqs); |
100 | void eio_set_max_poll_reqs (unsigned int nreqs); |
97 | /* when != 0, then eio_submit blocks as long as nready > count */ |
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98 | void eio_set_max_outstanding (unsigned int maxreqs); |
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99 | /* set maxinum number of idle threads */ |
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100 | void eio_set_max_idle (unsigned int nthreads); |
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101 | |
101 | |
102 | /* set minimum required number |
102 | /* set minimum required number |
103 | * maximum wanted number |
103 | * maximum wanted number |
104 | * or maximum idle number of threads */ |
104 | * or maximum idle number of threads */ |
105 | void eio_set_min_parallel (unsigned int nthreads); |
105 | void eio_set_min_parallel (unsigned int nthreads); |
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112 | unsigned int eio_nthreads (void); /* number of worker threads in use currently */ |
112 | unsigned int eio_nthreads (void); /* number of worker threads in use currently */ |
113 | |
113 | |
114 | /*****************************************************************************/ |
114 | /*****************************************************************************/ |
115 | /* high-level request API */ |
115 | /* high-level request API */ |
116 | |
116 | |
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117 | eio_req *eio_nop (eio_cb cb); /* does nothing except go through the whole process */ |
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118 | eio_req *eio_busy (eio_tstamp delay, eio_cb cb); /* ties a thread for this long, simulating busyness */ |
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119 | eio_req *eio_sync (eio_cb cb); |
117 | eio_req *eio_fsync (int fd, eio_cb cb); |
120 | eio_req *eio_fsync (int fd, eio_cb cb); |
118 | eio_req *eio_fdatasync (int fd, eio_cb cb); |
121 | eio_req *eio_fdatasync (int fd, eio_cb cb); |
119 | eio_req *eio_dupclose (int fd, eio_cb cb); |
122 | eio_req *eio_close (int fd, eio_cb cb); |
120 | eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb); |
123 | eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb); |
121 | eio_req *eio_read (int fd, off_t offs, size_t length, char *data, eio_cb cb); |
124 | eio_req *eio_read (int fd, void *data, size_t length, off_t offset, eio_cb cb); |
122 | eio_req *eio_write (int fd, off_t offs, size_t length, char *data, eio_cb cb); |
125 | eio_req *eio_write (int fd, void *data, size_t length, off_t offset, eio_cb cb); |
123 | eio_req *eio_fstat (int fd, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */ |
126 | eio_req *eio_fstat (int fd, eio_cb cb); /* stat buffer=ptr2 allocated dynamically */ |
124 | eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, eio_cb cb); |
127 | eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, eio_cb cb); |
125 | eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb); |
128 | eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb); |
126 | eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb); |
129 | eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb); |
127 | eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb); |
130 | eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb); |
128 | eio_req *eio_dup2 (int fd, int fd2, eio_cb cb); |
131 | eio_req *eio_dup2 (int fd, int fd2, eio_cb cb); |
129 | eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb); |
132 | eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb); |
130 | eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb); |
133 | eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb); |
131 | eio_req *eio_readlink (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */ |
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132 | eio_req *eio_stat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */ |
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133 | eio_req *eio_lstat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */ |
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134 | eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, eio_cb cb); |
134 | eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, eio_cb cb); |
135 | eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb); |
135 | eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb); |
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136 | eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb); |
136 | eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb); |
137 | eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb); |
137 | eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb); |
138 | eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb); |
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139 | eio_req *eio_readdir (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */ |
138 | eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb); |
140 | eio_req *eio_rmdir (const char *path, eio_cb cb); |
139 | eio_req *eio_unlink (const char *path, eio_cb cb); |
141 | eio_req *eio_unlink (const char *path, eio_cb cb); |
140 | eio_req *eio_rmdir (const char *path, eio_cb cb); |
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141 | eio_req *eio_readdir (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */ |
142 | eio_req *eio_readlink (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */ |
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143 | eio_req *eio_stat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocated dynamically */ |
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144 | eio_req *eio_lstat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocated dynamically */ |
142 | eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb); |
145 | eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb); |
143 | eio_req *eio_busy (eio_tstamp delay, eio_cb cb); /* ties a thread for this long, simulating busyness */ |
146 | eio_req *eio_link (const char *path, const char *new_path, eio_cb cb); |
144 | eio_req *eio_nop (eio_cb cb); /* does nothing except go through the whole process */ |
147 | eio_req *eio_symlink (const char *path, const char *new_path, eio_cb cb); |
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148 | eio_req *eio_rename (const char *path, const char *new_path, eio_cb cb); |
145 | |
149 | |
146 | /* for groups */ |
150 | /* for groups */ |
147 | eio_req *eio_grp (eio_cb cb); |
151 | eio_req *eio_grp (eio_cb cb); |
148 | void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit); |
152 | void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit); |
149 | void eio_grp_limit (eio_req *grp, int limit); |
153 | void eio_grp_limit (eio_req *grp, int limit); |
150 | void eio_grp_add (eio_req *grp, eio_req *req); |
154 | void eio_grp_add (eio_req *grp, eio_req *req); |
151 | void eio_grp_cancel (eio_req *grp); /* cancels all sub requests but not the group */ |
155 | void eio_grp_cancel (eio_req *grp); /* cancels all sub requests but not the group */ |
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156 | |
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157 | /* cancel a request as soon fast as possible */ |
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158 | void eio_cancel (eio_req *req); |
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159 | /* destroy a request that has never been submitted */ |
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160 | void eio_destroy (eio_req *req); |
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161 | |
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162 | /* true if the request was cancelled, useful in the invoke callback */ |
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163 | #define EIO_CANCELLED(req) ((req)->flags & EIO_FLAG_CANCELLED) |
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164 | |
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165 | #define EIO_RESULT(req) ((req)->result) |
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166 | /* returns a pointer to the result buffer allocated by eio */ |
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167 | #define EIO_BUF(req) ((req)->ptr2) |
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168 | #define EIO_STAT_BUF(req) ((EIO_STRUCT_STAT *)EIO_BUF(req)) |
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169 | #define EIO_PATH(req) ((char *)(req)->ptr1) |
152 | |
170 | |
153 | /*****************************************************************************/ |
171 | /*****************************************************************************/ |
154 | /* low-level request API */ |
172 | /* low-level request API */ |
155 | |
173 | |
156 | /* must be used to initialise eio_req's */ |
174 | /* must be used to initialise eio_req's */ |
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158 | memset ((req), 0, sizeof (eio_req)); \ |
176 | memset ((req), 0, sizeof (eio_req)); \ |
159 | (req)->pri = (prio) + EIO_PRI_BIAS; \ |
177 | (req)->pri = (prio) + EIO_PRI_BIAS; \ |
160 | (req)->finish = (finish_cb); \ |
178 | (req)->finish = (finish_cb); \ |
161 | (req)->destroy = (destroy_cb) |
179 | (req)->destroy = (destroy_cb) |
162 | |
180 | |
163 | /* true if the request was cancelled, useful in the invoke callback */ |
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164 | #define EIO_CANCELLED(req) ((req)->flags & EIO_FLAG_CANCELLED) |
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165 | |
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166 | /* submit a request for execution */ |
181 | /* submit a request for execution */ |
167 | void eio_submit (eio_req *req); |
182 | void eio_submit (eio_req *req); |
168 | /* cancel a request as soon fast as possible */ |
183 | |
169 | void eio_cancel (eio_req *req); |
184 | /*****************************************************************************/ |
170 | /* destroy a request that has never been submitted */ |
185 | /* convinience functions */ |
171 | void eio_destroy (eio_req *req); |
186 | |
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187 | ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count); |
172 | |
188 | |
173 | #endif |
189 | #endif |
174 | |
190 | |