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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_REQ_MEMBERS |
12 | # define EIO_COMMON void *data |
12 | # define EIO_REQ_MEMBERS |
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13 | #endif |
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14 | |
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15 | #ifndef EIO_STRUCT_STAT |
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16 | # define EIO_STRUCT_STAT struct stat |
13 | #endif |
17 | #endif |
14 | |
18 | |
15 | enum { |
19 | enum { |
16 | EIO_QUIT, |
20 | EIO_QUIT, |
17 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
21 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
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51 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode */ |
55 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode */ |
52 | long int3; /* chown, fchown: gid */ |
56 | long int3; /* chown, fchown: gid */ |
53 | int errorno; /* errno value on syscall return */ |
57 | int errorno; /* errno value on syscall return */ |
54 | |
58 | |
55 | unsigned char flags; /* private */ |
59 | unsigned char flags; /* private */ |
56 | unsigned char pri; /* the priority */ |
60 | signed char pri; /* the priority */ |
57 | |
61 | |
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62 | void *data; |
58 | eio_cb finish; |
63 | eio_cb finish; |
59 | void (*destroy)(eio_req *req); |
64 | void (*destroy)(eio_req *req); /* called when requets no longer needed */ |
60 | void (*feed)(eio_req *req); |
65 | void (*feed)(eio_req *req); /* only used for group requests */ |
61 | |
66 | |
62 | EIO_COMMON; |
67 | EIO_REQ_MEMBERS |
63 | |
68 | |
64 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ |
69 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ |
65 | }; |
70 | }; |
66 | |
71 | |
67 | enum { |
72 | enum { |
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72 | |
77 | |
73 | enum { |
78 | enum { |
74 | EIO_PRI_MIN = -4, |
79 | EIO_PRI_MIN = -4, |
75 | EIO_PRI_MAX = 4, |
80 | EIO_PRI_MAX = 4, |
76 | |
81 | |
77 | EIO_DEFAULT_PRI = 0, |
82 | EIO_PRI_DEFAULT = 0, |
78 | EIO_PRI_BIAS = -EIO_PRI_MIN, |
83 | EIO_PRI_BIAS = -EIO_PRI_MIN, |
79 | EIO_NUM_PRI = EIO_PRI_MAX + EIO_PRI_BIAS + 1 |
84 | EIO_NUM_PRI = EIO_PRI_MAX + EIO_PRI_BIAS + 1 |
80 | }; |
85 | }; |
81 | |
86 | |
82 | /* returns < 0 on error, errno set |
87 | /* returns < 0 on error, errno set |
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108 | unsigned int eio_nthreads (void); /* number of worker threads in use currently */ |
113 | unsigned int eio_nthreads (void); /* number of worker threads in use currently */ |
109 | |
114 | |
110 | /*****************************************************************************/ |
115 | /*****************************************************************************/ |
111 | /* high-level request API */ |
116 | /* high-level request API */ |
112 | |
117 | |
113 | eio_req *eio_fsync (int fd, eio_cb cb); |
118 | #ifndef EIO_NO_WRAPPERS |
114 | eio_req *eio_fdatasync (int fd, eio_cb cb); |
119 | eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ |
115 | eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb); |
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116 | eio_req *eio_read (int fd, off_t offset, size_t length, void *data, eio_cb cb); |
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117 | eio_req *eio_write (int fd, off_t offset, size_t length, void *data, eio_cb cb); |
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118 | eio_req *eio_fstat (int fd, eio_cb cb); /* stat buffer=ptr2 allocated dynamically */ |
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119 | eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, eio_cb cb); |
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120 | eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb); |
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121 | eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb); |
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122 | eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb); |
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123 | eio_req *eio_dup2 (int fd, int fd2, eio_cb cb); |
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124 | eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb); |
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125 | eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb); |
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126 | eio_req *eio_readlink (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */ |
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127 | eio_req *eio_stat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocated dynamically */ |
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128 | eio_req *eio_lstat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocated dynamically */ |
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129 | eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, eio_cb cb); |
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130 | eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb); |
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131 | eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb); |
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132 | eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb); |
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133 | eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb); |
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134 | eio_req *eio_unlink (const char *path, eio_cb cb); |
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135 | eio_req *eio_rmdir (const char *path, eio_cb cb); |
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136 | eio_req *eio_readdir (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */ |
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137 | eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb); |
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138 | eio_req *eio_busy (eio_tstamp delay, eio_cb cb); /* ties a thread for this long, simulating busyness */ |
120 | eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ |
139 | eio_req *eio_nop (eio_cb cb); /* does nothing except go through the whole process */ |
121 | eio_req *eio_sync (int pri, eio_cb cb, void *data); |
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122 | eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); |
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123 | eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); |
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124 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
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125 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
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126 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
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127 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
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128 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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129 | eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
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130 | eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data); |
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131 | eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data); |
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132 | eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); |
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133 | eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data); |
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134 | eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data); |
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135 | eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data); |
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136 | eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
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137 | eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data); |
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138 | eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); |
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139 | eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data); |
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140 | eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data); |
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141 | eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
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142 | eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data); |
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143 | eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data); |
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144 | eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
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145 | eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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146 | eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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147 | eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data); |
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148 | eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
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149 | eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
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150 | eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
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151 | #endif |
140 | |
152 | |
141 | /* for groups */ |
153 | /* for groups */ |
142 | eio_req *eio_grp (eio_cb cb); |
154 | eio_req *eio_grp (eio_cb cb, void *data); |
143 | void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit); |
155 | void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit); |
144 | void eio_grp_limit (eio_req *grp, int limit); |
156 | void eio_grp_limit (eio_req *grp, int limit); |
145 | void eio_grp_add (eio_req *grp, eio_req *req); |
157 | void eio_grp_add (eio_req *grp, eio_req *req); |
146 | void eio_grp_cancel (eio_req *grp); /* cancels all sub requests but not the group */ |
158 | void eio_grp_cancel (eio_req *grp); /* cancels all sub requests but not the group */ |
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159 | |
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160 | /* cancel a request as soon fast as possible */ |
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161 | void eio_cancel (eio_req *req); |
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162 | /* destroy a request that has never been submitted */ |
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163 | void eio_destroy (eio_req *req); |
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164 | |
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165 | /* true if the request was cancelled, useful in the invoke callback */ |
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166 | #define EIO_CANCELLED(req) ((req)->flags & EIO_FLAG_CANCELLED) |
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167 | |
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168 | #define EIO_RESULT(req) ((req)->result) |
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169 | /* returns a pointer to the result buffer allocated by eio */ |
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170 | #define EIO_BUF(req) ((req)->ptr2) |
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171 | #define EIO_STAT_BUF(req) ((EIO_STRUCT_STAT *)EIO_BUF(req)) |
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172 | #define EIO_PATH(req) ((char *)(req)->ptr1) |
147 | |
173 | |
148 | /*****************************************************************************/ |
174 | /*****************************************************************************/ |
149 | /* low-level request API */ |
175 | /* low-level request API */ |
150 | |
176 | |
151 | /* must be used to initialise eio_req's */ |
177 | /* must be used to initialise eio_req's */ |
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153 | memset ((req), 0, sizeof (eio_req)); \ |
179 | memset ((req), 0, sizeof (eio_req)); \ |
154 | (req)->pri = (prio) + EIO_PRI_BIAS; \ |
180 | (req)->pri = (prio) + EIO_PRI_BIAS; \ |
155 | (req)->finish = (finish_cb); \ |
181 | (req)->finish = (finish_cb); \ |
156 | (req)->destroy = (destroy_cb) |
182 | (req)->destroy = (destroy_cb) |
157 | |
183 | |
158 | /* true if the request was cancelled, useful in the invoke callback */ |
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159 | #define EIO_CANCELLED(req) ((req)->flags & EIO_FLAG_CANCELLED) |
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160 | |
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161 | /* submit a request for execution */ |
184 | /* submit a request for execution */ |
162 | void eio_submit (eio_req *req); |
185 | void eio_submit (eio_req *req); |
163 | /* cancel a request as soon fast as possible */ |
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164 | void eio_cancel (eio_req *req); |
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165 | /* destroy a request that has never been submitted */ |
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166 | void eio_destroy (eio_req *req); |
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167 | |
186 | |
168 | /*****************************************************************************/ |
187 | /*****************************************************************************/ |
169 | /* convinience functions */ |
188 | /* convinience functions */ |
170 | |
189 | |
171 | /*ssize_t eio_sendfile (int ofd, int ifd, off_t offset, size_t count)*/ |
190 | ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count); |
172 | |
191 | |
173 | #endif |
192 | #endif |
174 | |
193 | |