1 | /* |
1 | /* |
2 | * libeio implementation |
2 | * libeio implementation |
3 | * |
3 | * |
4 | * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libeio@schmorp.de> |
4 | * Copyright (c) 2007,2008,2009,2010,2011 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 | * |
… | |
… | |
35 | * and other provisions required by the GPL. If you do not delete the |
35 | * and other provisions required by the GPL. If you do not delete the |
36 | * provisions above, a recipient may use your version of this file under |
36 | * provisions above, a recipient may use your version of this file under |
37 | * either the BSD or the GPL. |
37 | * either the BSD or the GPL. |
38 | */ |
38 | */ |
39 | |
39 | |
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40 | #ifndef _WIN32 |
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41 | # include "config.h" |
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42 | #endif |
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43 | |
40 | #include "eio.h" |
44 | #include "eio.h" |
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45 | #include "ecb.h" |
41 | |
46 | |
42 | #ifdef EIO_STACKSIZE |
47 | #ifdef EIO_STACKSIZE |
43 | # define XTHREAD_STACKSIZE EIO_STACKSIZE |
48 | # define XTHREAD_STACKSIZE EIO_STACKSIZE |
44 | #endif |
49 | #endif |
45 | #include "xthread.h" |
50 | #include "xthread.h" |
… | |
… | |
53 | #include <sys/stat.h> |
58 | #include <sys/stat.h> |
54 | #include <limits.h> |
59 | #include <limits.h> |
55 | #include <fcntl.h> |
60 | #include <fcntl.h> |
56 | #include <assert.h> |
61 | #include <assert.h> |
57 | |
62 | |
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63 | /* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */ |
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64 | /* intptr_t only comes from stdint.h, says idiot openbsd coder */ |
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65 | #if HAVE_STDINT_H |
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66 | # include <stdint.h> |
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67 | #endif |
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68 | |
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69 | #ifndef ECANCELED |
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70 | # define ECANCELED EDOM |
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71 | #endif |
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72 | #ifndef ELOOP |
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73 | # define ELOOP EDOM |
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74 | #endif |
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75 | |
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76 | static void eio_destroy (eio_req *req); |
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77 | |
58 | #ifndef EIO_FINISH |
78 | #ifndef EIO_FINISH |
59 | # define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0 |
79 | # define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0 |
60 | #endif |
80 | #endif |
61 | |
81 | |
62 | #ifndef EIO_DESTROY |
82 | #ifndef EIO_DESTROY |
… | |
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65 | |
85 | |
66 | #ifndef EIO_FEED |
86 | #ifndef EIO_FEED |
67 | # define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0) |
87 | # define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0) |
68 | #endif |
88 | #endif |
69 | |
89 | |
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90 | #ifndef EIO_FD_TO_WIN32_HANDLE |
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91 | # define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) |
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92 | #endif |
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93 | #ifndef EIO_WIN32_HANDLE_TO_FD |
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94 | # define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) |
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95 | #endif |
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96 | |
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97 | #define EIO_ERRNO(errval,retval) ((errno = errval), retval) |
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98 | |
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99 | #define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1) |
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100 | |
70 | #ifdef _WIN32 |
101 | #ifdef _WIN32 |
71 | |
102 | |
72 | /*doh*/ |
103 | #undef PAGESIZE |
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104 | #define PAGESIZE 4096 /* GetSystemInfo? */ |
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105 | |
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106 | #ifdef EIO_STRUCT_STATI64 |
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107 | #define stat(path,buf) _stati64 (path,buf) |
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108 | #define fstat(fd,buf) _fstati64 (path,buf) |
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109 | #endif |
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110 | #define lstat(path,buf) stat (path,buf) |
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111 | #define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1)) |
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112 | #define mkdir(path,mode) _mkdir (path) |
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113 | #define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1)) |
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114 | |
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115 | #define chmod(path,mode) _chmod (path, mode) |
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116 | #define fchmod(fd,mode) EIO_ENOSYS () |
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117 | #define chown(path,uid,gid) EIO_ENOSYS () |
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118 | #define fchown(fd,uid,gid) EIO_ENOSYS () |
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119 | #define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */ |
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120 | #define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */ |
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121 | #define mknod(path,mode,dev) EIO_ENOSYS () |
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122 | #define sync() EIO_ENOSYS () |
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123 | #define readlink(path,buf,s) EIO_ENOSYS () |
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124 | #define statvfs(path,buf) EIO_ENOSYS () |
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125 | #define fstatvfs(fd,buf) EIO_ENOSYS () |
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126 | |
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127 | /* we could even stat and see if it exists */ |
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128 | static int |
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129 | symlink (const char *old, const char *neu) |
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130 | { |
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131 | #if WINVER >= 0x0600 |
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132 | if (CreateSymbolicLink (neu, old, 1)) |
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133 | return 0; |
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134 | |
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135 | if (CreateSymbolicLink (neu, old, 0)) |
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136 | return 0; |
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137 | #endif |
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138 | |
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139 | return EIO_ERRNO (ENOENT, -1); |
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140 | } |
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141 | |
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142 | /* POSIX API only */ |
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143 | #define CreateHardLink(neu,old) 0 |
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144 | #define CreateSymbolicLink(neu,old,flags) 0 |
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145 | |
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146 | struct statvfs |
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147 | { |
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148 | int dummy; |
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149 | }; |
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150 | |
73 | #else |
151 | #else |
74 | |
152 | |
75 | # include "config.h" |
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76 | # include <sys/time.h> |
153 | #include <sys/time.h> |
77 | # include <sys/select.h> |
154 | #include <sys/select.h> |
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155 | #include <sys/statvfs.h> |
78 | # include <unistd.h> |
156 | #include <unistd.h> |
79 | # include <utime.h> |
157 | #include <utime.h> |
80 | # include <signal.h> |
158 | #include <signal.h> |
81 | # include <dirent.h> |
159 | #include <dirent.h> |
82 | |
160 | |
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161 | #if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES |
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162 | #include <sys/mman.h> |
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163 | #endif |
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164 | |
83 | /* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */ |
165 | /* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */ |
84 | # if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) |
166 | #if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__ |
85 | # define _DIRENT_HAVE_D_TYPE /* sigh */ |
167 | #define _DIRENT_HAVE_D_TYPE /* sigh */ |
86 | # define D_INO(de) (de)->d_fileno |
168 | #define D_INO(de) (de)->d_fileno |
87 | # define D_NAMLEN(de) (de)->d_namlen |
169 | #define D_NAMLEN(de) (de)->d_namlen |
88 | # elif defined(__linux) || defined(d_ino) || _XOPEN_SOURCE >= 600 |
170 | #elif __linux || defined d_ino || _XOPEN_SOURCE >= 600 |
89 | # define D_INO(de) (de)->d_ino |
171 | #define D_INO(de) (de)->d_ino |
90 | # endif |
172 | #endif |
91 | |
173 | |
92 | #ifdef _D_EXACT_NAMLEN |
174 | #ifdef _D_EXACT_NAMLEN |
93 | # undef D_NAMLEN |
175 | #undef D_NAMLEN |
94 | # define D_NAMLEN(de) _D_EXACT_NAMLEN (de) |
176 | #define D_NAMLEN(de) _D_EXACT_NAMLEN (de) |
95 | #endif |
177 | #endif |
96 | |
178 | |
97 | # ifdef _DIRENT_HAVE_D_TYPE |
179 | #ifdef _DIRENT_HAVE_D_TYPE |
98 | # define D_TYPE(de) (de)->d_type |
180 | #define D_TYPE(de) (de)->d_type |
99 | # endif |
181 | #endif |
100 | |
182 | |
101 | # ifndef EIO_STRUCT_DIRENT |
183 | #ifndef EIO_STRUCT_DIRENT |
102 | # define EIO_STRUCT_DIRENT struct dirent |
184 | #define EIO_STRUCT_DIRENT struct dirent |
103 | # endif |
185 | #endif |
104 | |
186 | |
105 | #endif |
187 | #endif |
106 | |
188 | |
107 | #if HAVE_SENDFILE |
189 | #if HAVE_SENDFILE |
108 | # if __linux |
190 | # if __linux |
109 | # include <sys/sendfile.h> |
191 | # include <sys/sendfile.h> |
110 | # elif __freebsd |
192 | # elif __FreeBSD__ || defined __APPLE__ |
111 | # include <sys/socket.h> |
193 | # include <sys/socket.h> |
112 | # include <sys/uio.h> |
194 | # include <sys/uio.h> |
113 | # elif __hpux |
195 | # elif __hpux |
114 | # include <sys/socket.h> |
196 | # include <sys/socket.h> |
115 | # elif __solaris /* not yet */ |
197 | # elif __solaris |
116 | # include <sys/sendfile.h> |
198 | # include <sys/sendfile.h> |
117 | # else |
199 | # else |
118 | # error sendfile support requested but not available |
200 | # error sendfile support requested but not available |
119 | # endif |
201 | # endif |
120 | #endif |
202 | #endif |
… | |
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127 | #endif |
209 | #endif |
128 | #ifndef D_NAMLEN |
210 | #ifndef D_NAMLEN |
129 | # define D_NAMLEN(de) strlen ((de)->d_name) |
211 | # define D_NAMLEN(de) strlen ((de)->d_name) |
130 | #endif |
212 | #endif |
131 | |
213 | |
132 | /* number of seconds after which an idle threads exit */ |
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133 | #define IDLE_TIMEOUT 10 |
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134 | |
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135 | /* used for struct dirent, AIX doesn't provide it */ |
214 | /* used for struct dirent, AIX doesn't provide it */ |
136 | #ifndef NAME_MAX |
215 | #ifndef NAME_MAX |
137 | # define NAME_MAX 4096 |
216 | # define NAME_MAX 4096 |
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217 | #endif |
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218 | |
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219 | /* used for readlink etc. */ |
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220 | #ifndef PATH_MAX |
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221 | # define PATH_MAX 4096 |
138 | #endif |
222 | #endif |
139 | |
223 | |
140 | /* buffer size for various temporary buffers */ |
224 | /* buffer size for various temporary buffers */ |
141 | #define EIO_BUFSIZE 65536 |
225 | #define EIO_BUFSIZE 65536 |
142 | |
226 | |
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148 | errno = ENOMEM; \ |
232 | errno = ENOMEM; \ |
149 | if (!eio_buf) \ |
233 | if (!eio_buf) \ |
150 | return -1; |
234 | return -1; |
151 | |
235 | |
152 | #define EIO_TICKS ((1000000 + 1023) >> 10) |
236 | #define EIO_TICKS ((1000000 + 1023) >> 10) |
153 | |
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154 | /*****************************************************************************/ |
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155 | |
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156 | #if __GNUC__ >= 3 |
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157 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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158 | #else |
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159 | # define expect(expr,value) (expr) |
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160 | #endif |
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161 | |
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162 | #define expect_false(expr) expect ((expr) != 0, 0) |
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163 | #define expect_true(expr) expect ((expr) != 0, 1) |
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164 | |
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165 | /*****************************************************************************/ |
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166 | |
237 | |
167 | #define ETP_PRI_MIN EIO_PRI_MIN |
238 | #define ETP_PRI_MIN EIO_PRI_MIN |
168 | #define ETP_PRI_MAX EIO_PRI_MAX |
239 | #define ETP_PRI_MAX EIO_PRI_MAX |
169 | |
240 | |
170 | struct etp_worker; |
241 | struct etp_worker; |
… | |
… | |
195 | |
266 | |
196 | /*****************************************************************************/ |
267 | /*****************************************************************************/ |
197 | |
268 | |
198 | #define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1) |
269 | #define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1) |
199 | |
270 | |
200 | /* calculcate time difference in ~1/EIO_TICKS of a second */ |
271 | /* calculate time difference in ~1/EIO_TICKS of a second */ |
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272 | ecb_inline int |
201 | static int tvdiff (struct timeval *tv1, struct timeval *tv2) |
273 | tvdiff (struct timeval *tv1, struct timeval *tv2) |
202 | { |
274 | { |
203 | return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS |
275 | return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS |
204 | + ((tv2->tv_usec - tv1->tv_usec) >> 10); |
276 | + ((tv2->tv_usec - tv1->tv_usec) >> 10); |
205 | } |
277 | } |
206 | |
278 | |
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213 | static unsigned int max_poll_reqs; /* reslock */ |
285 | static unsigned int max_poll_reqs; /* reslock */ |
214 | |
286 | |
215 | static volatile unsigned int nreqs; /* reqlock */ |
287 | static volatile unsigned int nreqs; /* reqlock */ |
216 | static volatile unsigned int nready; /* reqlock */ |
288 | static volatile unsigned int nready; /* reqlock */ |
217 | static volatile unsigned int npending; /* reqlock */ |
289 | static volatile unsigned int npending; /* reqlock */ |
218 | static volatile unsigned int max_idle = 4; |
290 | static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */ |
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291 | static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */ |
219 | |
292 | |
220 | static mutex_t wrklock = X_MUTEX_INIT; |
293 | static xmutex_t wrklock; |
221 | static mutex_t reslock = X_MUTEX_INIT; |
294 | static xmutex_t reslock; |
222 | static mutex_t reqlock = X_MUTEX_INIT; |
295 | static xmutex_t reqlock; |
223 | static cond_t reqwait = X_COND_INIT; |
296 | static xcond_t reqwait; |
224 | |
297 | |
225 | #if !HAVE_PREADWRITE |
298 | #if !HAVE_PREADWRITE |
226 | /* |
299 | /* |
227 | * make our pread/pwrite emulation safe against themselves, but not against |
300 | * make our pread/pwrite emulation safe against themselves, but not against |
228 | * normal read/write by using a mutex. slows down execution a lot, |
301 | * normal read/write by using a mutex. slows down execution a lot, |
229 | * but that's your problem, not mine. |
302 | * but that's your problem, not mine. |
230 | */ |
303 | */ |
231 | static mutex_t preadwritelock = X_MUTEX_INIT; |
304 | static xmutex_t preadwritelock = X_MUTEX_INIT; |
232 | #endif |
305 | #endif |
233 | |
306 | |
234 | typedef struct etp_worker |
307 | typedef struct etp_worker |
235 | { |
308 | { |
236 | /* locked by wrklock */ |
309 | /* locked by wrklock */ |
237 | struct etp_worker *prev, *next; |
310 | struct etp_worker *prev, *next; |
238 | |
311 | |
239 | thread_t tid; |
312 | xthread_t tid; |
240 | |
313 | |
241 | /* locked by reslock, reqlock or wrklock */ |
314 | /* locked by reslock, reqlock or wrklock */ |
242 | ETP_REQ *req; /* currently processed request */ |
315 | ETP_REQ *req; /* currently processed request */ |
243 | |
316 | |
244 | ETP_WORKER_COMMON |
317 | ETP_WORKER_COMMON |
… | |
… | |
249 | #define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock) |
322 | #define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock) |
250 | #define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock) |
323 | #define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock) |
251 | |
324 | |
252 | /* worker threads management */ |
325 | /* worker threads management */ |
253 | |
326 | |
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327 | static void ecb_cold |
254 | static void etp_worker_clear (etp_worker *wrk) |
328 | etp_worker_clear (etp_worker *wrk) |
255 | { |
329 | { |
256 | ETP_WORKER_CLEAR (wrk); |
330 | ETP_WORKER_CLEAR (wrk); |
257 | } |
331 | } |
258 | |
332 | |
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333 | static void ecb_cold |
259 | static void etp_worker_free (etp_worker *wrk) |
334 | etp_worker_free (etp_worker *wrk) |
260 | { |
335 | { |
261 | wrk->next->prev = wrk->prev; |
336 | wrk->next->prev = wrk->prev; |
262 | wrk->prev->next = wrk->next; |
337 | wrk->prev->next = wrk->next; |
263 | |
338 | |
264 | free (wrk); |
339 | free (wrk); |
265 | } |
340 | } |
266 | |
341 | |
267 | static unsigned int etp_nreqs (void) |
342 | static unsigned int |
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343 | etp_nreqs (void) |
268 | { |
344 | { |
269 | int retval; |
345 | int retval; |
270 | if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
346 | if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
271 | retval = nreqs; |
347 | retval = nreqs; |
272 | if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
348 | if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
273 | return retval; |
349 | return retval; |
274 | } |
350 | } |
275 | |
351 | |
276 | static unsigned int etp_nready (void) |
352 | static unsigned int |
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353 | etp_nready (void) |
277 | { |
354 | { |
278 | unsigned int retval; |
355 | unsigned int retval; |
279 | |
356 | |
280 | if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
357 | if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
281 | retval = nready; |
358 | retval = nready; |
282 | if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
359 | if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
283 | |
360 | |
284 | return retval; |
361 | return retval; |
285 | } |
362 | } |
286 | |
363 | |
287 | static unsigned int etp_npending (void) |
364 | static unsigned int |
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365 | etp_npending (void) |
288 | { |
366 | { |
289 | unsigned int retval; |
367 | unsigned int retval; |
290 | |
368 | |
291 | if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
369 | if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
292 | retval = npending; |
370 | retval = npending; |
293 | if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
371 | if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
294 | |
372 | |
295 | return retval; |
373 | return retval; |
296 | } |
374 | } |
297 | |
375 | |
298 | static unsigned int etp_nthreads (void) |
376 | static unsigned int |
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377 | etp_nthreads (void) |
299 | { |
378 | { |
300 | unsigned int retval; |
379 | unsigned int retval; |
301 | |
380 | |
302 | if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
381 | if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
303 | retval = started; |
382 | retval = started; |
… | |
… | |
317 | } etp_reqq; |
396 | } etp_reqq; |
318 | |
397 | |
319 | static etp_reqq req_queue; |
398 | static etp_reqq req_queue; |
320 | static etp_reqq res_queue; |
399 | static etp_reqq res_queue; |
321 | |
400 | |
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401 | static int ecb_noinline |
322 | static int reqq_push (etp_reqq *q, ETP_REQ *req) |
402 | reqq_push (etp_reqq *q, ETP_REQ *req) |
323 | { |
403 | { |
324 | int pri = req->pri; |
404 | int pri = req->pri; |
325 | req->next = 0; |
405 | req->next = 0; |
326 | |
406 | |
327 | if (q->qe[pri]) |
407 | if (q->qe[pri]) |
… | |
… | |
333 | q->qe[pri] = q->qs[pri] = req; |
413 | q->qe[pri] = q->qs[pri] = req; |
334 | |
414 | |
335 | return q->size++; |
415 | return q->size++; |
336 | } |
416 | } |
337 | |
417 | |
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418 | static ETP_REQ * ecb_noinline |
338 | static ETP_REQ *reqq_shift (etp_reqq *q) |
419 | reqq_shift (etp_reqq *q) |
339 | { |
420 | { |
340 | int pri; |
421 | int pri; |
341 | |
422 | |
342 | if (!q->size) |
423 | if (!q->size) |
343 | return 0; |
424 | return 0; |
… | |
… | |
358 | } |
439 | } |
359 | |
440 | |
360 | abort (); |
441 | abort (); |
361 | } |
442 | } |
362 | |
443 | |
363 | static void etp_atfork_prepare (void) |
444 | static void ecb_cold |
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445 | etp_thread_init (void) |
364 | { |
446 | { |
365 | X_LOCK (wrklock); |
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366 | X_LOCK (reqlock); |
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367 | X_LOCK (reslock); |
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368 | #if !HAVE_PREADWRITE |
447 | #if !HAVE_PREADWRITE |
369 | X_LOCK (preadwritelock); |
448 | X_MUTEX_CREATE (preadwritelock); |
370 | #endif |
449 | #endif |
|
|
450 | X_MUTEX_CREATE (wrklock); |
|
|
451 | X_MUTEX_CREATE (reslock); |
|
|
452 | X_MUTEX_CREATE (reqlock); |
|
|
453 | X_COND_CREATE (reqwait); |
371 | } |
454 | } |
372 | |
455 | |
|
|
456 | static void ecb_cold |
|
|
457 | etp_atfork_prepare (void) |
|
|
458 | { |
|
|
459 | } |
|
|
460 | |
|
|
461 | static void ecb_cold |
373 | static void etp_atfork_parent (void) |
462 | etp_atfork_parent (void) |
374 | { |
463 | { |
375 | #if !HAVE_PREADWRITE |
|
|
376 | X_UNLOCK (preadwritelock); |
|
|
377 | #endif |
|
|
378 | X_UNLOCK (reslock); |
|
|
379 | X_UNLOCK (reqlock); |
|
|
380 | X_UNLOCK (wrklock); |
|
|
381 | } |
464 | } |
382 | |
465 | |
|
|
466 | static void ecb_cold |
383 | static void etp_atfork_child (void) |
467 | etp_atfork_child (void) |
384 | { |
468 | { |
385 | ETP_REQ *prv; |
469 | ETP_REQ *prv; |
386 | |
470 | |
387 | while ((prv = reqq_shift (&req_queue))) |
471 | while ((prv = reqq_shift (&req_queue))) |
388 | ETP_DESTROY (prv); |
472 | ETP_DESTROY (prv); |
… | |
… | |
405 | idle = 0; |
489 | idle = 0; |
406 | nreqs = 0; |
490 | nreqs = 0; |
407 | nready = 0; |
491 | nready = 0; |
408 | npending = 0; |
492 | npending = 0; |
409 | |
493 | |
410 | etp_atfork_parent (); |
494 | etp_thread_init (); |
411 | } |
495 | } |
412 | |
496 | |
413 | static void |
497 | static void ecb_cold |
414 | etp_once_init (void) |
498 | etp_once_init (void) |
415 | { |
499 | { |
|
|
500 | etp_thread_init (); |
416 | X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child); |
501 | X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child); |
417 | } |
502 | } |
418 | |
503 | |
419 | static int |
504 | static int ecb_cold |
420 | etp_init (void (*want_poll)(void), void (*done_poll)(void)) |
505 | etp_init (void (*want_poll)(void), void (*done_poll)(void)) |
421 | { |
506 | { |
422 | static pthread_once_t doinit = PTHREAD_ONCE_INIT; |
507 | static pthread_once_t doinit = PTHREAD_ONCE_INIT; |
423 | |
508 | |
424 | pthread_once (&doinit, etp_once_init); |
509 | pthread_once (&doinit, etp_once_init); |
… | |
… | |
429 | return 0; |
514 | return 0; |
430 | } |
515 | } |
431 | |
516 | |
432 | X_THREAD_PROC (etp_proc); |
517 | X_THREAD_PROC (etp_proc); |
433 | |
518 | |
|
|
519 | static void ecb_cold |
434 | static void etp_start_thread (void) |
520 | etp_start_thread (void) |
435 | { |
521 | { |
436 | etp_worker *wrk = calloc (1, sizeof (etp_worker)); |
522 | etp_worker *wrk = calloc (1, sizeof (etp_worker)); |
437 | |
523 | |
438 | /*TODO*/ |
524 | /*TODO*/ |
439 | assert (("unable to allocate worker thread data", wrk)); |
525 | assert (("unable to allocate worker thread data", wrk)); |
… | |
… | |
452 | free (wrk); |
538 | free (wrk); |
453 | |
539 | |
454 | X_UNLOCK (wrklock); |
540 | X_UNLOCK (wrklock); |
455 | } |
541 | } |
456 | |
542 | |
|
|
543 | static void |
457 | static void etp_maybe_start_thread (void) |
544 | etp_maybe_start_thread (void) |
458 | { |
545 | { |
459 | if (expect_true (etp_nthreads () >= wanted)) |
546 | if (ecb_expect_true (etp_nthreads () >= wanted)) |
460 | return; |
547 | return; |
461 | |
548 | |
462 | /* todo: maybe use idle here, but might be less exact */ |
549 | /* todo: maybe use idle here, but might be less exact */ |
463 | if (expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ())) |
550 | if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ())) |
464 | return; |
551 | return; |
465 | |
552 | |
466 | etp_start_thread (); |
553 | etp_start_thread (); |
467 | } |
554 | } |
468 | |
555 | |
|
|
556 | static void ecb_cold |
469 | static void etp_end_thread (void) |
557 | etp_end_thread (void) |
470 | { |
558 | { |
471 | eio_req *req = calloc (1, sizeof (eio_req)); |
559 | eio_req *req = calloc (1, sizeof (eio_req)); |
472 | |
560 | |
473 | req->type = -1; |
561 | req->type = -1; |
474 | req->pri = ETP_PRI_MAX - ETP_PRI_MIN; |
562 | req->pri = ETP_PRI_MAX - ETP_PRI_MIN; |
… | |
… | |
481 | X_LOCK (wrklock); |
569 | X_LOCK (wrklock); |
482 | --started; |
570 | --started; |
483 | X_UNLOCK (wrklock); |
571 | X_UNLOCK (wrklock); |
484 | } |
572 | } |
485 | |
573 | |
486 | static int etp_poll (void) |
574 | static int |
|
|
575 | etp_poll (void) |
487 | { |
576 | { |
488 | unsigned int maxreqs; |
577 | unsigned int maxreqs; |
489 | unsigned int maxtime; |
578 | unsigned int maxtime; |
490 | struct timeval tv_start, tv_now; |
579 | struct timeval tv_start, tv_now; |
491 | |
580 | |
… | |
… | |
521 | |
610 | |
522 | X_LOCK (reqlock); |
611 | X_LOCK (reqlock); |
523 | --nreqs; |
612 | --nreqs; |
524 | X_UNLOCK (reqlock); |
613 | X_UNLOCK (reqlock); |
525 | |
614 | |
526 | if (expect_false (req->type == EIO_GROUP && req->size)) |
615 | if (ecb_expect_false (req->type == EIO_GROUP && req->size)) |
527 | { |
616 | { |
528 | req->int1 = 1; /* mark request as delayed */ |
617 | req->int1 = 1; /* mark request as delayed */ |
529 | continue; |
618 | continue; |
530 | } |
619 | } |
531 | else |
620 | else |
532 | { |
621 | { |
533 | int res = ETP_FINISH (req); |
622 | int res = ETP_FINISH (req); |
534 | if (expect_false (res)) |
623 | if (ecb_expect_false (res)) |
535 | return res; |
624 | return res; |
536 | } |
625 | } |
537 | |
626 | |
538 | if (expect_false (maxreqs && !--maxreqs)) |
627 | if (ecb_expect_false (maxreqs && !--maxreqs)) |
539 | break; |
628 | break; |
540 | |
629 | |
541 | if (maxtime) |
630 | if (maxtime) |
542 | { |
631 | { |
543 | gettimeofday (&tv_now, 0); |
632 | gettimeofday (&tv_now, 0); |
… | |
… | |
549 | |
638 | |
550 | errno = EAGAIN; |
639 | errno = EAGAIN; |
551 | return -1; |
640 | return -1; |
552 | } |
641 | } |
553 | |
642 | |
|
|
643 | static void |
554 | static void etp_cancel (ETP_REQ *req) |
644 | etp_cancel (ETP_REQ *req) |
555 | { |
645 | { |
556 | X_LOCK (wrklock); |
646 | req->cancelled = 1; |
557 | req->flags |= EIO_FLAG_CANCELLED; |
|
|
558 | X_UNLOCK (wrklock); |
|
|
559 | |
647 | |
560 | eio_grp_cancel (req); |
648 | eio_grp_cancel (req); |
561 | } |
649 | } |
562 | |
650 | |
|
|
651 | static void |
563 | static void etp_submit (ETP_REQ *req) |
652 | etp_submit (ETP_REQ *req) |
564 | { |
653 | { |
565 | req->pri -= ETP_PRI_MIN; |
654 | req->pri -= ETP_PRI_MIN; |
566 | |
655 | |
567 | if (expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN; |
656 | if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN; |
568 | if (expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN; |
657 | if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN; |
569 | |
658 | |
570 | if (expect_false (req->type == EIO_GROUP)) |
659 | if (ecb_expect_false (req->type == EIO_GROUP)) |
571 | { |
660 | { |
572 | /* I hope this is worth it :/ */ |
661 | /* I hope this is worth it :/ */ |
573 | X_LOCK (reqlock); |
662 | X_LOCK (reqlock); |
574 | ++nreqs; |
663 | ++nreqs; |
575 | X_UNLOCK (reqlock); |
664 | X_UNLOCK (reqlock); |
… | |
… | |
594 | |
683 | |
595 | etp_maybe_start_thread (); |
684 | etp_maybe_start_thread (); |
596 | } |
685 | } |
597 | } |
686 | } |
598 | |
687 | |
|
|
688 | static void ecb_cold |
599 | static void etp_set_max_poll_time (double nseconds) |
689 | etp_set_max_poll_time (double nseconds) |
600 | { |
690 | { |
601 | if (WORDACCESS_UNSAFE) X_LOCK (reslock); |
691 | if (WORDACCESS_UNSAFE) X_LOCK (reslock); |
602 | max_poll_time = nseconds; |
692 | max_poll_time = nseconds * EIO_TICKS; |
603 | if (WORDACCESS_UNSAFE) X_UNLOCK (reslock); |
693 | if (WORDACCESS_UNSAFE) X_UNLOCK (reslock); |
604 | } |
694 | } |
605 | |
695 | |
|
|
696 | static void ecb_cold |
606 | static void etp_set_max_poll_reqs (unsigned int maxreqs) |
697 | etp_set_max_poll_reqs (unsigned int maxreqs) |
607 | { |
698 | { |
608 | if (WORDACCESS_UNSAFE) X_LOCK (reslock); |
699 | if (WORDACCESS_UNSAFE) X_LOCK (reslock); |
609 | max_poll_reqs = maxreqs; |
700 | max_poll_reqs = maxreqs; |
610 | if (WORDACCESS_UNSAFE) X_UNLOCK (reslock); |
701 | if (WORDACCESS_UNSAFE) X_UNLOCK (reslock); |
611 | } |
702 | } |
612 | |
703 | |
|
|
704 | static void ecb_cold |
613 | static void etp_set_max_idle (unsigned int nthreads) |
705 | etp_set_max_idle (unsigned int nthreads) |
614 | { |
706 | { |
615 | if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
707 | if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
616 | max_idle = nthreads <= 0 ? 1 : nthreads; |
708 | max_idle = nthreads; |
617 | if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
709 | if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
618 | } |
710 | } |
619 | |
711 | |
|
|
712 | static void ecb_cold |
|
|
713 | etp_set_idle_timeout (unsigned int seconds) |
|
|
714 | { |
|
|
715 | if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
|
|
716 | idle_timeout = seconds; |
|
|
717 | if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
|
|
718 | } |
|
|
719 | |
|
|
720 | static void ecb_cold |
620 | static void etp_set_min_parallel (unsigned int nthreads) |
721 | etp_set_min_parallel (unsigned int nthreads) |
621 | { |
722 | { |
622 | if (wanted < nthreads) |
723 | if (wanted < nthreads) |
623 | wanted = nthreads; |
724 | wanted = nthreads; |
624 | } |
725 | } |
625 | |
726 | |
|
|
727 | static void ecb_cold |
626 | static void etp_set_max_parallel (unsigned int nthreads) |
728 | etp_set_max_parallel (unsigned int nthreads) |
627 | { |
729 | { |
628 | if (wanted > nthreads) |
730 | if (wanted > nthreads) |
629 | wanted = nthreads; |
731 | wanted = nthreads; |
630 | |
732 | |
631 | while (started > wanted) |
733 | while (started > wanted) |
632 | etp_end_thread (); |
734 | etp_end_thread (); |
633 | } |
735 | } |
634 | |
736 | |
635 | /*****************************************************************************/ |
737 | /*****************************************************************************/ |
636 | |
738 | |
|
|
739 | static void |
637 | static void grp_try_feed (eio_req *grp) |
740 | grp_try_feed (eio_req *grp) |
638 | { |
741 | { |
639 | while (grp->size < grp->int2 && !EIO_CANCELLED (grp)) |
742 | while (grp->size < grp->int2 && !EIO_CANCELLED (grp)) |
640 | { |
743 | { |
641 | grp->flags &= ~EIO_FLAG_GROUPADD; |
744 | grp->flags &= ~EIO_FLAG_GROUPADD; |
642 | |
745 | |
… | |
… | |
649 | break; |
752 | break; |
650 | } |
753 | } |
651 | } |
754 | } |
652 | } |
755 | } |
653 | |
756 | |
|
|
757 | static int |
654 | static int grp_dec (eio_req *grp) |
758 | grp_dec (eio_req *grp) |
655 | { |
759 | { |
656 | --grp->size; |
760 | --grp->size; |
657 | |
761 | |
658 | /* call feeder, if applicable */ |
762 | /* call feeder, if applicable */ |
659 | grp_try_feed (grp); |
763 | grp_try_feed (grp); |
… | |
… | |
663 | return eio_finish (grp); |
767 | return eio_finish (grp); |
664 | else |
768 | else |
665 | return 0; |
769 | return 0; |
666 | } |
770 | } |
667 | |
771 | |
|
|
772 | static void |
668 | void eio_destroy (eio_req *req) |
773 | eio_destroy (eio_req *req) |
669 | { |
774 | { |
670 | if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1); |
775 | if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1); |
671 | if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2); |
776 | if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2); |
672 | |
777 | |
673 | EIO_DESTROY (req); |
778 | EIO_DESTROY (req); |
674 | } |
779 | } |
675 | |
780 | |
|
|
781 | static int |
676 | static int eio_finish (eio_req *req) |
782 | eio_finish (eio_req *req) |
677 | { |
783 | { |
678 | int res = EIO_FINISH (req); |
784 | int res = EIO_FINISH (req); |
679 | |
785 | |
680 | if (req->grp) |
786 | if (req->grp) |
681 | { |
787 | { |
… | |
… | |
689 | if (grp->grp_first == req) |
795 | if (grp->grp_first == req) |
690 | grp->grp_first = req->grp_next; |
796 | grp->grp_first = req->grp_next; |
691 | |
797 | |
692 | res2 = grp_dec (grp); |
798 | res2 = grp_dec (grp); |
693 | |
799 | |
694 | if (!res && res2) |
800 | if (!res) |
695 | res = res2; |
801 | res = res2; |
696 | } |
802 | } |
697 | |
803 | |
698 | eio_destroy (req); |
804 | eio_destroy (req); |
699 | |
805 | |
700 | return res; |
806 | return res; |
701 | } |
807 | } |
702 | |
808 | |
|
|
809 | void |
703 | void eio_grp_cancel (eio_req *grp) |
810 | eio_grp_cancel (eio_req *grp) |
704 | { |
811 | { |
705 | for (grp = grp->grp_first; grp; grp = grp->grp_next) |
812 | for (grp = grp->grp_first; grp; grp = grp->grp_next) |
706 | eio_cancel (grp); |
813 | eio_cancel (grp); |
707 | } |
814 | } |
708 | |
815 | |
|
|
816 | void |
709 | void eio_cancel (eio_req *req) |
817 | eio_cancel (eio_req *req) |
710 | { |
818 | { |
711 | etp_cancel (req); |
819 | etp_cancel (req); |
712 | } |
820 | } |
713 | |
821 | |
|
|
822 | void |
714 | void eio_submit (eio_req *req) |
823 | eio_submit (eio_req *req) |
715 | { |
824 | { |
716 | etp_submit (req); |
825 | etp_submit (req); |
717 | } |
826 | } |
718 | |
827 | |
719 | unsigned int eio_nreqs (void) |
828 | unsigned int |
|
|
829 | eio_nreqs (void) |
720 | { |
830 | { |
721 | return etp_nreqs (); |
831 | return etp_nreqs (); |
722 | } |
832 | } |
723 | |
833 | |
724 | unsigned int eio_nready (void) |
834 | unsigned int |
|
|
835 | eio_nready (void) |
725 | { |
836 | { |
726 | return etp_nready (); |
837 | return etp_nready (); |
727 | } |
838 | } |
728 | |
839 | |
729 | unsigned int eio_npending (void) |
840 | unsigned int |
|
|
841 | eio_npending (void) |
730 | { |
842 | { |
731 | return etp_npending (); |
843 | return etp_npending (); |
732 | } |
844 | } |
733 | |
845 | |
734 | unsigned int eio_nthreads (void) |
846 | unsigned int ecb_cold |
|
|
847 | eio_nthreads (void) |
735 | { |
848 | { |
736 | return etp_nthreads (); |
849 | return etp_nthreads (); |
737 | } |
850 | } |
738 | |
851 | |
|
|
852 | void ecb_cold |
739 | void eio_set_max_poll_time (double nseconds) |
853 | eio_set_max_poll_time (double nseconds) |
740 | { |
854 | { |
741 | etp_set_max_poll_time (nseconds); |
855 | etp_set_max_poll_time (nseconds); |
742 | } |
856 | } |
743 | |
857 | |
|
|
858 | void ecb_cold |
744 | void eio_set_max_poll_reqs (unsigned int maxreqs) |
859 | eio_set_max_poll_reqs (unsigned int maxreqs) |
745 | { |
860 | { |
746 | etp_set_max_poll_reqs (maxreqs); |
861 | etp_set_max_poll_reqs (maxreqs); |
747 | } |
862 | } |
748 | |
863 | |
|
|
864 | void ecb_cold |
749 | void eio_set_max_idle (unsigned int nthreads) |
865 | eio_set_max_idle (unsigned int nthreads) |
750 | { |
866 | { |
751 | etp_set_max_idle (nthreads); |
867 | etp_set_max_idle (nthreads); |
752 | } |
868 | } |
753 | |
869 | |
|
|
870 | void ecb_cold |
|
|
871 | eio_set_idle_timeout (unsigned int seconds) |
|
|
872 | { |
|
|
873 | etp_set_idle_timeout (seconds); |
|
|
874 | } |
|
|
875 | |
|
|
876 | void ecb_cold |
754 | void eio_set_min_parallel (unsigned int nthreads) |
877 | eio_set_min_parallel (unsigned int nthreads) |
755 | { |
878 | { |
756 | etp_set_min_parallel (nthreads); |
879 | etp_set_min_parallel (nthreads); |
757 | } |
880 | } |
758 | |
881 | |
|
|
882 | void ecb_cold |
759 | void eio_set_max_parallel (unsigned int nthreads) |
883 | eio_set_max_parallel (unsigned int nthreads) |
760 | { |
884 | { |
761 | etp_set_max_parallel (nthreads); |
885 | etp_set_max_parallel (nthreads); |
762 | } |
886 | } |
763 | |
887 | |
764 | int eio_poll (void) |
888 | int eio_poll (void) |
… | |
… | |
773 | # undef pread |
897 | # undef pread |
774 | # undef pwrite |
898 | # undef pwrite |
775 | # define pread eio__pread |
899 | # define pread eio__pread |
776 | # define pwrite eio__pwrite |
900 | # define pwrite eio__pwrite |
777 | |
901 | |
778 | static ssize_t |
902 | static eio_ssize_t |
779 | eio__pread (int fd, void *buf, size_t count, off_t offset) |
903 | eio__pread (int fd, void *buf, size_t count, off_t offset) |
780 | { |
904 | { |
781 | ssize_t res; |
905 | eio_ssize_t res; |
782 | off_t ooffset; |
906 | off_t ooffset; |
783 | |
907 | |
784 | X_LOCK (preadwritelock); |
908 | X_LOCK (preadwritelock); |
785 | ooffset = lseek (fd, 0, SEEK_CUR); |
909 | ooffset = lseek (fd, 0, SEEK_CUR); |
786 | lseek (fd, offset, SEEK_SET); |
910 | lseek (fd, offset, SEEK_SET); |
… | |
… | |
789 | X_UNLOCK (preadwritelock); |
913 | X_UNLOCK (preadwritelock); |
790 | |
914 | |
791 | return res; |
915 | return res; |
792 | } |
916 | } |
793 | |
917 | |
794 | static ssize_t |
918 | static eio_ssize_t |
795 | eio__pwrite (int fd, void *buf, size_t count, off_t offset) |
919 | eio__pwrite (int fd, void *buf, size_t count, off_t offset) |
796 | { |
920 | { |
797 | ssize_t res; |
921 | eio_ssize_t res; |
798 | off_t ooffset; |
922 | off_t ooffset; |
799 | |
923 | |
800 | X_LOCK (preadwritelock); |
924 | X_LOCK (preadwritelock); |
801 | ooffset = lseek (fd, 0, SEEK_CUR); |
925 | ooffset = lseek (fd, 0, SEEK_CUR); |
802 | lseek (fd, offset, SEEK_SET); |
926 | lseek (fd, offset, SEEK_SET); |
… | |
… | |
806 | |
930 | |
807 | return res; |
931 | return res; |
808 | } |
932 | } |
809 | #endif |
933 | #endif |
810 | |
934 | |
811 | #ifndef HAVE_FUTIMES |
935 | #ifndef HAVE_UTIMES |
812 | |
936 | |
813 | # undef utimes |
937 | # undef utimes |
814 | # undef futimes |
|
|
815 | # define utimes(path,times) eio__utimes (path, times) |
938 | # define utimes(path,times) eio__utimes (path, times) |
816 | # define futimes(fd,times) eio__futimes (fd, times) |
|
|
817 | |
939 | |
818 | static int |
940 | static int |
819 | eio__utimes (const char *filename, const struct timeval times[2]) |
941 | eio__utimes (const char *filename, const struct timeval times[2]) |
820 | { |
942 | { |
821 | if (times) |
943 | if (times) |
… | |
… | |
829 | } |
951 | } |
830 | else |
952 | else |
831 | return utime (filename, 0); |
953 | return utime (filename, 0); |
832 | } |
954 | } |
833 | |
955 | |
|
|
956 | #endif |
|
|
957 | |
|
|
958 | #ifndef HAVE_FUTIMES |
|
|
959 | |
|
|
960 | # undef futimes |
|
|
961 | # define futimes(fd,times) eio__futimes (fd, times) |
|
|
962 | |
|
|
963 | static int |
834 | static int eio__futimes (int fd, const struct timeval tv[2]) |
964 | eio__futimes (int fd, const struct timeval tv[2]) |
835 | { |
965 | { |
836 | errno = ENOSYS; |
966 | errno = ENOSYS; |
837 | return -1; |
967 | return -1; |
838 | } |
968 | } |
839 | |
969 | |
… | |
… | |
843 | # undef fdatasync |
973 | # undef fdatasync |
844 | # define fdatasync(fd) fsync (fd) |
974 | # define fdatasync(fd) fsync (fd) |
845 | #endif |
975 | #endif |
846 | |
976 | |
847 | /* sync_file_range always needs emulation */ |
977 | /* sync_file_range always needs emulation */ |
848 | int |
978 | static int |
849 | eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags) |
979 | eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags) |
850 | { |
980 | { |
851 | #if HAVE_SYNC_FILE_RANGE |
981 | #if HAVE_SYNC_FILE_RANGE |
852 | int res; |
982 | int res; |
853 | |
983 | |
… | |
… | |
866 | if (!res || errno != ENOSYS) |
996 | if (!res || errno != ENOSYS) |
867 | return res; |
997 | return res; |
868 | #endif |
998 | #endif |
869 | |
999 | |
870 | /* even though we could play tricks with the flags, it's better to always |
1000 | /* even though we could play tricks with the flags, it's better to always |
871 | * call fdatasync, as thta matches the expectation of it's users best */ |
1001 | * call fdatasync, as that matches the expectation of its users best */ |
872 | return fdatasync (fd); |
1002 | return fdatasync (fd); |
|
|
1003 | } |
|
|
1004 | |
|
|
1005 | static int |
|
|
1006 | eio__fallocate (int fd, int mode, off_t offset, size_t len) |
|
|
1007 | { |
|
|
1008 | #if HAVE_FALLOCATE |
|
|
1009 | return fallocate (fd, mode, offset, len); |
|
|
1010 | #else |
|
|
1011 | errno = ENOSYS; |
|
|
1012 | return -1; |
|
|
1013 | #endif |
873 | } |
1014 | } |
874 | |
1015 | |
875 | #if !HAVE_READAHEAD |
1016 | #if !HAVE_READAHEAD |
876 | # undef readahead |
1017 | # undef readahead |
877 | # define readahead(fd,offset,count) eio__readahead (fd, offset, count, self) |
1018 | # define readahead(fd,offset,count) eio__readahead (fd, offset, count, self) |
878 | |
1019 | |
879 | static ssize_t |
1020 | static eio_ssize_t |
880 | eio__readahead (int fd, off_t offset, size_t count, etp_worker *self) |
1021 | eio__readahead (int fd, off_t offset, size_t count, etp_worker *self) |
881 | { |
1022 | { |
882 | size_t todo = count; |
1023 | size_t todo = count; |
883 | dBUF; |
1024 | dBUF; |
884 | |
1025 | |
… | |
… | |
896 | } |
1037 | } |
897 | |
1038 | |
898 | #endif |
1039 | #endif |
899 | |
1040 | |
900 | /* sendfile always needs emulation */ |
1041 | /* sendfile always needs emulation */ |
901 | static ssize_t |
1042 | static eio_ssize_t |
902 | eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self) |
1043 | eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self) |
903 | { |
1044 | { |
|
|
1045 | eio_ssize_t written = 0; |
904 | ssize_t res; |
1046 | eio_ssize_t res; |
905 | |
1047 | |
906 | if (!count) |
1048 | if (!count) |
907 | return 0; |
1049 | return 0; |
908 | |
1050 | |
|
|
1051 | for (;;) |
|
|
1052 | { |
|
|
1053 | #ifdef __APPLE__ |
|
|
1054 | # undef HAVE_SENDFILE /* broken, as everything on os x */ |
|
|
1055 | #endif |
909 | #if HAVE_SENDFILE |
1056 | #if HAVE_SENDFILE |
910 | # if __linux |
1057 | # if __linux |
|
|
1058 | off_t soffset = offset; |
911 | res = sendfile (ofd, ifd, &offset, count); |
1059 | res = sendfile (ofd, ifd, &soffset, count); |
912 | |
1060 | |
913 | # elif __freebsd |
1061 | # elif __FreeBSD__ |
914 | /* |
1062 | /* |
915 | * Of course, the freebsd sendfile is a dire hack with no thoughts |
1063 | * Of course, the freebsd sendfile is a dire hack with no thoughts |
916 | * wasted on making it similar to other I/O functions. |
1064 | * wasted on making it similar to other I/O functions. |
917 | */ |
1065 | */ |
918 | { |
|
|
919 | off_t sbytes; |
1066 | off_t sbytes; |
920 | res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
1067 | res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
921 | |
1068 | |
922 | if (res < 0 && sbytes) |
1069 | #if 0 /* according to the manpage, this is correct, but broken behaviour */ |
923 | /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */ |
1070 | /* freebsd' sendfile will return 0 on success */ |
|
|
1071 | /* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */ |
|
|
1072 | /* not on e.g. EIO or EPIPE - sounds broken */ |
|
|
1073 | if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0) |
924 | res = sbytes; |
1074 | res = sbytes; |
925 | } |
1075 | #endif |
|
|
1076 | |
|
|
1077 | /* according to source inspection, this is correct, and useful behaviour */ |
|
|
1078 | if (sbytes) |
|
|
1079 | res = sbytes; |
|
|
1080 | |
|
|
1081 | # elif defined (__APPLE__) |
|
|
1082 | off_t sbytes = count; |
|
|
1083 | res = sendfile (ifd, ofd, offset, &sbytes, 0, 0); |
|
|
1084 | |
|
|
1085 | /* according to the manpage, sbytes is always valid */ |
|
|
1086 | if (sbytes) |
|
|
1087 | res = sbytes; |
926 | |
1088 | |
927 | # elif __hpux |
1089 | # elif __hpux |
928 | res = sendfile (ofd, ifd, offset, count, 0, 0); |
1090 | res = sendfile (ofd, ifd, offset, count, 0, 0); |
929 | |
1091 | |
930 | # elif __solaris |
1092 | # elif __solaris |
931 | { |
|
|
932 | struct sendfilevec vec; |
1093 | struct sendfilevec vec; |
933 | size_t sbytes; |
1094 | size_t sbytes; |
934 | |
1095 | |
935 | vec.sfv_fd = ifd; |
1096 | vec.sfv_fd = ifd; |
936 | vec.sfv_flag = 0; |
1097 | vec.sfv_flag = 0; |
937 | vec.sfv_off = offset; |
1098 | vec.sfv_off = offset; |
938 | vec.sfv_len = count; |
1099 | vec.sfv_len = count; |
939 | |
1100 | |
940 | res = sendfilev (ofd, &vec, 1, &sbytes); |
1101 | res = sendfilev (ofd, &vec, 1, &sbytes); |
941 | |
1102 | |
942 | if (res < 0 && sbytes) |
1103 | if (res < 0 && sbytes) |
943 | res = sbytes; |
1104 | res = sbytes; |
944 | } |
|
|
945 | |
1105 | |
946 | # endif |
1106 | # endif |
|
|
1107 | |
|
|
1108 | #elif defined (_WIN32) && 0 |
|
|
1109 | /* does not work, just for documentation of what would need to be done */ |
|
|
1110 | /* actually, cannot be done like this, as TransmitFile changes the file offset, */ |
|
|
1111 | /* libeio guarantees that the file offset does not change, and windows */ |
|
|
1112 | /* has no way to get an independent handle to the same file description */ |
|
|
1113 | HANDLE h = TO_SOCKET (ifd); |
|
|
1114 | SetFilePointer (h, offset, 0, FILE_BEGIN); |
|
|
1115 | res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0); |
|
|
1116 | |
947 | #else |
1117 | #else |
948 | res = -1; |
1118 | res = -1; |
949 | errno = ENOSYS; |
1119 | errno = ENOSYS; |
950 | #endif |
1120 | #endif |
951 | |
1121 | |
|
|
1122 | /* we assume sendfile can copy at least 128mb in one go */ |
|
|
1123 | if (res <= 128 * 1024 * 1024) |
|
|
1124 | { |
|
|
1125 | if (res > 0) |
|
|
1126 | written += res; |
|
|
1127 | |
|
|
1128 | if (written) |
|
|
1129 | return written; |
|
|
1130 | |
|
|
1131 | break; |
|
|
1132 | } |
|
|
1133 | else |
|
|
1134 | { |
|
|
1135 | /* if we requested more, then probably the kernel was lazy */ |
|
|
1136 | written += res; |
|
|
1137 | offset += res; |
|
|
1138 | count -= res; |
|
|
1139 | |
|
|
1140 | if (!count) |
|
|
1141 | return written; |
|
|
1142 | } |
|
|
1143 | } |
|
|
1144 | |
952 | if (res < 0 |
1145 | if (res < 0 |
953 | && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
1146 | && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
|
|
1147 | /* BSDs */ |
|
|
1148 | #ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */ |
|
|
1149 | || errno == ENOTSUP |
|
|
1150 | #endif |
|
|
1151 | #ifdef EOPNOTSUPP /* windows */ |
|
|
1152 | || errno == EOPNOTSUPP /* BSDs */ |
|
|
1153 | #endif |
954 | #if __solaris |
1154 | #if __solaris |
955 | || errno == EAFNOSUPPORT || errno == EPROTOTYPE |
1155 | || errno == EAFNOSUPPORT || errno == EPROTOTYPE |
956 | #endif |
1156 | #endif |
957 | ) |
1157 | ) |
958 | ) |
1158 | ) |
… | |
… | |
962 | |
1162 | |
963 | res = 0; |
1163 | res = 0; |
964 | |
1164 | |
965 | while (count) |
1165 | while (count) |
966 | { |
1166 | { |
967 | ssize_t cnt; |
1167 | eio_ssize_t cnt; |
968 | |
1168 | |
969 | cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset); |
1169 | cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset); |
970 | |
1170 | |
971 | if (cnt <= 0) |
1171 | if (cnt <= 0) |
972 | { |
1172 | { |
… | |
… | |
989 | } |
1189 | } |
990 | |
1190 | |
991 | return res; |
1191 | return res; |
992 | } |
1192 | } |
993 | |
1193 | |
|
|
1194 | #ifdef PAGESIZE |
|
|
1195 | # define eio_pagesize() PAGESIZE |
|
|
1196 | #else |
|
|
1197 | static intptr_t |
|
|
1198 | eio_pagesize (void) |
|
|
1199 | { |
|
|
1200 | static intptr_t page; |
|
|
1201 | |
|
|
1202 | if (!page) |
|
|
1203 | page = sysconf (_SC_PAGESIZE); |
|
|
1204 | |
|
|
1205 | return page; |
|
|
1206 | } |
|
|
1207 | #endif |
|
|
1208 | |
|
|
1209 | static void |
|
|
1210 | eio_page_align (void **addr, size_t *length) |
|
|
1211 | { |
|
|
1212 | intptr_t mask = eio_pagesize () - 1; |
|
|
1213 | |
|
|
1214 | /* round down addr */ |
|
|
1215 | intptr_t adj = mask & (intptr_t)*addr; |
|
|
1216 | |
|
|
1217 | *addr = (void *)((intptr_t)*addr - adj); |
|
|
1218 | *length += adj; |
|
|
1219 | |
|
|
1220 | /* round up length */ |
|
|
1221 | *length = (*length + mask) & ~mask; |
|
|
1222 | } |
|
|
1223 | |
|
|
1224 | #if !_POSIX_MEMLOCK |
|
|
1225 | # define eio__mlockall(a) EIO_ENOSYS () |
|
|
1226 | #else |
|
|
1227 | |
994 | static int |
1228 | static int |
|
|
1229 | eio__mlockall (int flags) |
|
|
1230 | { |
|
|
1231 | #if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7 |
|
|
1232 | extern int mallopt (int, int); |
|
|
1233 | mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */ |
|
|
1234 | #endif |
|
|
1235 | |
|
|
1236 | if (EIO_MCL_CURRENT != MCL_CURRENT |
|
|
1237 | || EIO_MCL_FUTURE != MCL_FUTURE) |
|
|
1238 | { |
|
|
1239 | flags = 0 |
|
|
1240 | | (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0) |
|
|
1241 | | (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0); |
|
|
1242 | } |
|
|
1243 | |
|
|
1244 | return mlockall (flags); |
|
|
1245 | } |
|
|
1246 | #endif |
|
|
1247 | |
|
|
1248 | #if !_POSIX_MEMLOCK_RANGE |
|
|
1249 | # define eio__mlock(a,b) EIO_ENOSYS () |
|
|
1250 | #else |
|
|
1251 | |
|
|
1252 | static int |
|
|
1253 | eio__mlock (void *addr, size_t length) |
|
|
1254 | { |
|
|
1255 | eio_page_align (&addr, &length); |
|
|
1256 | |
|
|
1257 | return mlock (addr, length); |
|
|
1258 | } |
|
|
1259 | |
|
|
1260 | #endif |
|
|
1261 | |
|
|
1262 | #if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO) |
|
|
1263 | # define eio__msync(a,b,c) EIO_ENOSYS () |
|
|
1264 | #else |
|
|
1265 | |
|
|
1266 | static int |
|
|
1267 | eio__msync (void *mem, size_t len, int flags) |
|
|
1268 | { |
|
|
1269 | eio_page_align (&mem, &len); |
|
|
1270 | |
|
|
1271 | if (EIO_MS_ASYNC != MS_SYNC |
|
|
1272 | || EIO_MS_INVALIDATE != MS_INVALIDATE |
|
|
1273 | || EIO_MS_SYNC != MS_SYNC) |
|
|
1274 | { |
|
|
1275 | flags = 0 |
|
|
1276 | | (flags & EIO_MS_ASYNC ? MS_ASYNC : 0) |
|
|
1277 | | (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0) |
|
|
1278 | | (flags & EIO_MS_SYNC ? MS_SYNC : 0); |
|
|
1279 | } |
|
|
1280 | |
|
|
1281 | return msync (mem, len, flags); |
|
|
1282 | } |
|
|
1283 | |
|
|
1284 | #endif |
|
|
1285 | |
|
|
1286 | static int |
|
|
1287 | eio__mtouch (eio_req *req) |
|
|
1288 | { |
|
|
1289 | void *mem = req->ptr2; |
|
|
1290 | size_t len = req->size; |
|
|
1291 | int flags = req->int1; |
|
|
1292 | |
|
|
1293 | eio_page_align (&mem, &len); |
|
|
1294 | |
|
|
1295 | { |
|
|
1296 | intptr_t addr = (intptr_t)mem; |
|
|
1297 | intptr_t end = addr + len; |
|
|
1298 | intptr_t page = eio_pagesize (); |
|
|
1299 | |
|
|
1300 | if (addr < end) |
|
|
1301 | if (flags & EIO_MT_MODIFY) /* modify */ |
|
|
1302 | do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req)); |
|
|
1303 | else |
|
|
1304 | do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req)); |
|
|
1305 | } |
|
|
1306 | |
|
|
1307 | return 0; |
|
|
1308 | } |
|
|
1309 | |
|
|
1310 | /*****************************************************************************/ |
|
|
1311 | /* requests implemented outside eio_execute, because they are so large */ |
|
|
1312 | |
|
|
1313 | static void |
|
|
1314 | eio__realpath (eio_req *req, etp_worker *self) |
|
|
1315 | { |
|
|
1316 | char *rel = req->ptr1; |
|
|
1317 | char *res; |
|
|
1318 | char *tmp1, *tmp2; |
|
|
1319 | #if SYMLOOP_MAX > 32 |
|
|
1320 | int symlinks = SYMLOOP_MAX; |
|
|
1321 | #else |
|
|
1322 | int symlinks = 32; |
|
|
1323 | #endif |
|
|
1324 | |
|
|
1325 | req->result = -1; |
|
|
1326 | |
|
|
1327 | errno = EINVAL; |
|
|
1328 | if (!rel) |
|
|
1329 | return; |
|
|
1330 | |
|
|
1331 | errno = ENOENT; |
|
|
1332 | if (!*rel) |
|
|
1333 | return; |
|
|
1334 | |
|
|
1335 | if (!req->ptr2) |
|
|
1336 | { |
|
|
1337 | X_LOCK (wrklock); |
|
|
1338 | req->flags |= EIO_FLAG_PTR2_FREE; |
|
|
1339 | X_UNLOCK (wrklock); |
|
|
1340 | req->ptr2 = malloc (PATH_MAX * 3); |
|
|
1341 | |
|
|
1342 | errno = ENOMEM; |
|
|
1343 | if (!req->ptr2) |
|
|
1344 | return; |
|
|
1345 | } |
|
|
1346 | |
|
|
1347 | res = req->ptr2; |
|
|
1348 | tmp1 = res + PATH_MAX; |
|
|
1349 | tmp2 = tmp1 + PATH_MAX; |
|
|
1350 | |
|
|
1351 | #if 0 /* disabled, the musl way to do things is just too racy */ |
|
|
1352 | #if __linux && defined(O_NONBLOCK) && defined(O_NOATIME) |
|
|
1353 | /* on linux we may be able to ask the kernel */ |
|
|
1354 | { |
|
|
1355 | int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME); |
|
|
1356 | |
|
|
1357 | if (fd >= 0) |
|
|
1358 | { |
|
|
1359 | sprintf (tmp1, "/proc/self/fd/%d", fd); |
|
|
1360 | req->result = readlink (tmp1, res, PATH_MAX); |
|
|
1361 | close (fd); |
|
|
1362 | |
|
|
1363 | /* here we should probably stat the open file and the disk file, to make sure they still match */ |
|
|
1364 | |
|
|
1365 | if (req->result > 0) |
|
|
1366 | goto done; |
|
|
1367 | } |
|
|
1368 | else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO) |
|
|
1369 | return; |
|
|
1370 | } |
|
|
1371 | #endif |
|
|
1372 | #endif |
|
|
1373 | |
|
|
1374 | if (*rel != '/') |
|
|
1375 | { |
|
|
1376 | if (!getcwd (res, PATH_MAX)) |
|
|
1377 | return; |
|
|
1378 | |
|
|
1379 | if (res [1]) /* only use if not / */ |
|
|
1380 | res += strlen (res); |
|
|
1381 | } |
|
|
1382 | |
|
|
1383 | while (*rel) |
|
|
1384 | { |
|
|
1385 | eio_ssize_t len, linklen; |
|
|
1386 | char *beg = rel; |
|
|
1387 | |
|
|
1388 | while (*rel && *rel != '/') |
|
|
1389 | ++rel; |
|
|
1390 | |
|
|
1391 | len = rel - beg; |
|
|
1392 | |
|
|
1393 | if (!len) /* skip slashes */ |
|
|
1394 | { |
|
|
1395 | ++rel; |
|
|
1396 | continue; |
|
|
1397 | } |
|
|
1398 | |
|
|
1399 | if (beg [0] == '.') |
|
|
1400 | { |
|
|
1401 | if (len == 1) |
|
|
1402 | continue; /* . - nop */ |
|
|
1403 | |
|
|
1404 | if (beg [1] == '.' && len == 2) |
|
|
1405 | { |
|
|
1406 | /* .. - back up one component, if possible */ |
|
|
1407 | |
|
|
1408 | while (res != req->ptr2) |
|
|
1409 | if (*--res == '/') |
|
|
1410 | break; |
|
|
1411 | |
|
|
1412 | continue; |
|
|
1413 | } |
|
|
1414 | } |
|
|
1415 | |
|
|
1416 | errno = ENAMETOOLONG; |
|
|
1417 | if (res + 1 + len + 1 >= tmp1) |
|
|
1418 | return; |
|
|
1419 | |
|
|
1420 | /* copy one component */ |
|
|
1421 | *res = '/'; |
|
|
1422 | memcpy (res + 1, beg, len); |
|
|
1423 | |
|
|
1424 | /* zero-terminate, for readlink */ |
|
|
1425 | res [len + 1] = 0; |
|
|
1426 | |
|
|
1427 | /* now check if it's a symlink */ |
|
|
1428 | linklen = readlink (req->ptr2, tmp1, PATH_MAX); |
|
|
1429 | |
|
|
1430 | if (linklen < 0) |
|
|
1431 | { |
|
|
1432 | if (errno != EINVAL) |
|
|
1433 | return; |
|
|
1434 | |
|
|
1435 | /* it's a normal directory. hopefully */ |
|
|
1436 | res += len + 1; |
|
|
1437 | } |
|
|
1438 | else |
|
|
1439 | { |
|
|
1440 | /* yay, it was a symlink - build new path in tmp2 */ |
|
|
1441 | int rellen = strlen (rel); |
|
|
1442 | |
|
|
1443 | errno = ENAMETOOLONG; |
|
|
1444 | if (linklen + 1 + rellen >= PATH_MAX) |
|
|
1445 | return; |
|
|
1446 | |
|
|
1447 | errno = ELOOP; |
|
|
1448 | if (!--symlinks) |
|
|
1449 | return; |
|
|
1450 | |
|
|
1451 | if (*tmp1 == '/') |
|
|
1452 | res = req->ptr2; /* symlink resolves to an absolute path */ |
|
|
1453 | |
|
|
1454 | /* we need to be careful, as rel might point into tmp2 already */ |
|
|
1455 | memmove (tmp2 + linklen + 1, rel, rellen + 1); |
|
|
1456 | tmp2 [linklen] = '/'; |
|
|
1457 | memcpy (tmp2, tmp1, linklen); |
|
|
1458 | |
|
|
1459 | rel = tmp2; |
|
|
1460 | } |
|
|
1461 | } |
|
|
1462 | |
|
|
1463 | /* special case for the lone root path */ |
|
|
1464 | if (res == req->ptr2) |
|
|
1465 | *res++ = '/'; |
|
|
1466 | |
|
|
1467 | req->result = res - (char *)req->ptr2; |
|
|
1468 | |
|
|
1469 | done: |
|
|
1470 | req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */ |
|
|
1471 | } |
|
|
1472 | |
|
|
1473 | static signed char |
995 | eio_dent_cmp (const void *a_, const void *b_) |
1474 | eio_dent_cmp (const eio_dirent *a, const eio_dirent *b) |
996 | { |
1475 | { |
997 | const eio_dirent *a = (const eio_dirent *)a_; |
1476 | return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */ |
998 | const eio_dirent *b = (const eio_dirent *)b_; |
1477 | : a->inode < b->inode ? -1 |
|
|
1478 | : a->inode > b->inode ? 1 |
|
|
1479 | : 0; |
|
|
1480 | } |
999 | |
1481 | |
1000 | return (int)b->score - (int)a->score ? (int)b->score - (int)a->score |
1482 | #define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0 |
1001 | : a->inode < b->inode ? -1 : a->inode > b->inode ? 1 : 0; /* int might be < ino_t */ |
1483 | |
|
|
1484 | #define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */ |
|
|
1485 | #define EIO_SORT_FAST 60 /* when to only use insertion sort */ |
|
|
1486 | |
|
|
1487 | static void |
|
|
1488 | eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits) |
|
|
1489 | { |
|
|
1490 | unsigned char bits [9 + sizeof (ino_t) * 8]; |
|
|
1491 | unsigned char *bit = bits; |
|
|
1492 | |
|
|
1493 | assert (CHAR_BIT == 8); |
|
|
1494 | assert (sizeof (eio_dirent) * 8 < 256); |
|
|
1495 | assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */ |
|
|
1496 | assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */ |
|
|
1497 | |
|
|
1498 | if (size <= EIO_SORT_FAST) |
|
|
1499 | return; |
|
|
1500 | |
|
|
1501 | /* first prepare an array of bits to test in our radix sort */ |
|
|
1502 | /* try to take endianness into account, as well as differences in ino_t sizes */ |
|
|
1503 | /* inode_bits must contain all inodes ORed together */ |
|
|
1504 | /* which is used to skip bits that are 0 everywhere, which is very common */ |
|
|
1505 | { |
|
|
1506 | ino_t endianness; |
|
|
1507 | int i, j; |
|
|
1508 | |
|
|
1509 | /* we store the byte offset of byte n into byte n of "endianness" */ |
|
|
1510 | for (i = 0; i < sizeof (ino_t); ++i) |
|
|
1511 | ((unsigned char *)&endianness)[i] = i; |
|
|
1512 | |
|
|
1513 | *bit++ = 0; |
|
|
1514 | |
|
|
1515 | for (i = 0; i < sizeof (ino_t); ++i) |
|
|
1516 | { |
|
|
1517 | /* shifting off the byte offsets out of "endianness" */ |
|
|
1518 | int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8; |
|
|
1519 | endianness >>= 8; |
|
|
1520 | |
|
|
1521 | for (j = 0; j < 8; ++j) |
|
|
1522 | if (inode_bits & (((ino_t)1) << (i * 8 + j))) |
|
|
1523 | *bit++ = offs + j; |
|
|
1524 | } |
|
|
1525 | |
|
|
1526 | for (j = 0; j < 8; ++j) |
|
|
1527 | if (score_bits & (1 << j)) |
|
|
1528 | *bit++ = offsetof (eio_dirent, score) * 8 + j; |
|
|
1529 | } |
|
|
1530 | |
|
|
1531 | /* now actually do the sorting (a variant of MSD radix sort) */ |
|
|
1532 | { |
|
|
1533 | eio_dirent *base_stk [9 + sizeof (ino_t) * 8], *base; |
|
|
1534 | eio_dirent *end_stk [9 + sizeof (ino_t) * 8], *end; |
|
|
1535 | unsigned char *bit_stk [9 + sizeof (ino_t) * 8]; |
|
|
1536 | int stk_idx = 0; |
|
|
1537 | |
|
|
1538 | base_stk [stk_idx] = dents; |
|
|
1539 | end_stk [stk_idx] = dents + size; |
|
|
1540 | bit_stk [stk_idx] = bit - 1; |
|
|
1541 | |
|
|
1542 | do |
|
|
1543 | { |
|
|
1544 | base = base_stk [stk_idx]; |
|
|
1545 | end = end_stk [stk_idx]; |
|
|
1546 | bit = bit_stk [stk_idx]; |
|
|
1547 | |
|
|
1548 | for (;;) |
|
|
1549 | { |
|
|
1550 | unsigned char O = *bit >> 3; |
|
|
1551 | unsigned char M = 1 << (*bit & 7); |
|
|
1552 | |
|
|
1553 | eio_dirent *a = base; |
|
|
1554 | eio_dirent *b = end; |
|
|
1555 | |
|
|
1556 | if (b - a < EIO_SORT_CUTOFF) |
|
|
1557 | break; |
|
|
1558 | |
|
|
1559 | /* now bit-partition the array on the bit */ |
|
|
1560 | /* this ugly asymmetric loop seems to perform much better than typical */ |
|
|
1561 | /* partition algos found in the literature */ |
|
|
1562 | do |
|
|
1563 | if (!(((unsigned char *)a)[O] & M)) |
|
|
1564 | ++a; |
|
|
1565 | else if (!(((unsigned char *)--b)[O] & M)) |
|
|
1566 | { |
|
|
1567 | eio_dirent tmp = *a; *a = *b; *b = tmp; |
|
|
1568 | ++a; |
|
|
1569 | } |
|
|
1570 | while (b > a); |
|
|
1571 | |
|
|
1572 | /* next bit, or stop, if no bits left in this path */ |
|
|
1573 | if (!*--bit) |
|
|
1574 | break; |
|
|
1575 | |
|
|
1576 | base_stk [stk_idx] = a; |
|
|
1577 | end_stk [stk_idx] = end; |
|
|
1578 | bit_stk [stk_idx] = bit; |
|
|
1579 | ++stk_idx; |
|
|
1580 | |
|
|
1581 | end = a; |
|
|
1582 | } |
|
|
1583 | } |
|
|
1584 | while (stk_idx--); |
|
|
1585 | } |
|
|
1586 | } |
|
|
1587 | |
|
|
1588 | static void |
|
|
1589 | eio_dent_insertion_sort (eio_dirent *dents, int size) |
|
|
1590 | { |
|
|
1591 | /* first move the smallest element to the front, to act as a sentinel */ |
|
|
1592 | { |
|
|
1593 | int i; |
|
|
1594 | eio_dirent *min = dents; |
|
|
1595 | |
|
|
1596 | /* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */ |
|
|
1597 | for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; ) |
|
|
1598 | if (EIO_DENT_CMP (dents [i], <, *min)) |
|
|
1599 | min = &dents [i]; |
|
|
1600 | |
|
|
1601 | /* swap elements 0 and j (minimum) */ |
|
|
1602 | { |
|
|
1603 | eio_dirent tmp = *dents; *dents = *min; *min = tmp; |
|
|
1604 | } |
|
|
1605 | } |
|
|
1606 | |
|
|
1607 | /* then do standard insertion sort, assuming that all elements are >= dents [0] */ |
|
|
1608 | { |
|
|
1609 | eio_dirent *i, *j; |
|
|
1610 | |
|
|
1611 | for (i = dents + 1; i < dents + size; ++i) |
|
|
1612 | { |
|
|
1613 | eio_dirent value = *i; |
|
|
1614 | |
|
|
1615 | for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j) |
|
|
1616 | j [1] = j [0]; |
|
|
1617 | |
|
|
1618 | j [1] = value; |
|
|
1619 | } |
|
|
1620 | } |
|
|
1621 | } |
|
|
1622 | |
|
|
1623 | static void |
|
|
1624 | eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits) |
|
|
1625 | { |
|
|
1626 | if (size <= 1) |
|
|
1627 | return; /* our insertion sort relies on size > 0 */ |
|
|
1628 | |
|
|
1629 | /* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */ |
|
|
1630 | /* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */ |
|
|
1631 | eio_dent_radix_sort (dents, size, score_bits, inode_bits); |
|
|
1632 | |
|
|
1633 | /* use an insertion sort at the end, or for small arrays, */ |
|
|
1634 | /* as insertion sort is more efficient for small partitions */ |
|
|
1635 | eio_dent_insertion_sort (dents, size); |
1002 | } |
1636 | } |
1003 | |
1637 | |
1004 | /* read a full directory */ |
1638 | /* read a full directory */ |
1005 | static void |
1639 | static void |
1006 | eio__scandir (eio_req *req, etp_worker *self) |
1640 | eio__scandir (eio_req *req, etp_worker *self) |
1007 | { |
1641 | { |
1008 | DIR *dirp; |
1642 | DIR *dirp; |
1009 | EIO_STRUCT_DIRENT *entp; |
1643 | EIO_STRUCT_DIRENT *entp; |
1010 | unsigned char *name, *names; |
1644 | char *name, *names; |
1011 | int namesalloc = 4096; |
1645 | int namesalloc = 4096; |
1012 | int namesoffs = 0; |
1646 | int namesoffs = 0; |
1013 | int flags = req->int1; |
1647 | int flags = req->int1; |
1014 | eio_dirent *dents = 0; |
1648 | eio_dirent *dents = 0; |
1015 | int dentalloc = 128; |
1649 | int dentalloc = 128; |
1016 | int dentoffs = 0; |
1650 | int dentoffs = 0; |
|
|
1651 | ino_t inode_bits = 0; |
1017 | |
1652 | |
1018 | req->result = -1; |
1653 | req->result = -1; |
1019 | |
1654 | |
1020 | if (!(flags & EIO_READDIR_DENTS)) |
1655 | if (!(flags & EIO_READDIR_DENTS)) |
1021 | flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER); |
1656 | flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER); |
1022 | |
1657 | |
1023 | X_LOCK (wrklock); |
1658 | X_LOCK (wrklock); |
1024 | /* the corresponding closedir is in ETP_WORKER_CLEAR */ |
1659 | /* the corresponding closedir is in ETP_WORKER_CLEAR */ |
1025 | self->dirp = dirp = opendir (req->ptr1); |
1660 | self->dirp = dirp = opendir (req->ptr1); |
|
|
1661 | |
|
|
1662 | if (req->flags & EIO_FLAG_PTR1_FREE) |
|
|
1663 | free (req->ptr1); |
|
|
1664 | |
1026 | req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE; |
1665 | req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE; |
1027 | req->ptr1 = names = malloc (namesalloc); |
|
|
1028 | req->ptr2 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0; |
1666 | req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0; |
|
|
1667 | req->ptr2 = names = malloc (namesalloc); |
1029 | X_UNLOCK (wrklock); |
1668 | X_UNLOCK (wrklock); |
1030 | |
1669 | |
1031 | if (dirp && names && (!flags || dents)) |
1670 | if (dirp && names && (!flags || dents)) |
1032 | for (;;) |
1671 | for (;;) |
1033 | { |
1672 | { |
… | |
… | |
1041 | |
1680 | |
1042 | /* sort etc. */ |
1681 | /* sort etc. */ |
1043 | req->int1 = flags; |
1682 | req->int1 = flags; |
1044 | req->result = dentoffs; |
1683 | req->result = dentoffs; |
1045 | |
1684 | |
1046 | if (dents) |
|
|
1047 | { |
|
|
1048 | eio_dirent *ent = dents + dentoffs; |
|
|
1049 | |
|
|
1050 | while (ent > dents) |
|
|
1051 | (--ent)->name = names + (size_t)ent->name; |
|
|
1052 | } |
|
|
1053 | |
|
|
1054 | if (flags & EIO_READDIR_STAT_ORDER |
1685 | if (flags & EIO_READDIR_STAT_ORDER) |
1055 | || !(~flags & (EIO_READDIR_DIRS_FIRST | EIO_READDIR_FOUND_UNKNOWN))) |
1686 | eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits); |
1056 | { |
|
|
1057 | /* pray your qsort doesn't use quicksort */ |
|
|
1058 | qsort (dents, dentoffs, sizeof (*dents), eio_dent_cmp); /* score depends of DIRS_FIRST */ |
|
|
1059 | } |
|
|
1060 | else if (flags & EIO_READDIR_DIRS_FIRST) |
1687 | else if (flags & EIO_READDIR_DIRS_FIRST) |
|
|
1688 | if (flags & EIO_READDIR_FOUND_UNKNOWN) |
|
|
1689 | eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */ |
|
|
1690 | else |
1061 | { |
1691 | { |
1062 | /* in this case, all is known, and we just put dirs first and sort them */ |
1692 | /* in this case, all is known, and we just put dirs first and sort them */ |
1063 | eio_dirent *ent = dents + dentoffs; |
1693 | eio_dirent *oth = dents + dentoffs; |
1064 | eio_dirent *dir = dents; |
1694 | eio_dirent *dir = dents; |
1065 | |
1695 | |
|
|
1696 | /* now partition dirs to the front, and non-dirs to the back */ |
|
|
1697 | /* by walking from both sides and swapping if necessary */ |
1066 | while (ent > dir) |
1698 | while (oth > dir) |
1067 | { |
1699 | { |
1068 | if (dir->type == DT_DIR) |
1700 | if (dir->type == EIO_DT_DIR) |
1069 | ++dir; |
1701 | ++dir; |
1070 | else |
|
|
1071 | { |
|
|
1072 | --ent; |
|
|
1073 | |
|
|
1074 | if (ent->type == DT_DIR) |
1702 | else if ((--oth)->type == EIO_DT_DIR) |
1075 | { |
1703 | { |
1076 | eio_dirent tmp = *dir; |
1704 | eio_dirent tmp = *dir; *dir = *oth; *oth = tmp; |
1077 | *dir = *ent; |
|
|
1078 | *ent = tmp; |
|
|
1079 | |
1705 | |
1080 | ++dir; |
1706 | ++dir; |
1081 | } |
1707 | } |
1082 | } |
1708 | } |
|
|
1709 | |
|
|
1710 | /* now sort the dirs only (dirs all have the same score) */ |
|
|
1711 | eio_dent_sort (dents, dir - dents, 0, inode_bits); |
1083 | } |
1712 | } |
1084 | |
|
|
1085 | /* now sort the dirs only */ |
|
|
1086 | qsort (dents, dir - dents, sizeof (*dents), eio_dent_cmp); |
|
|
1087 | } |
|
|
1088 | |
|
|
1089 | /* only provide the names array unless DENTS is specified */ |
|
|
1090 | if (!(flags & EIO_READDIR_DENTS)) |
|
|
1091 | { |
|
|
1092 | X_LOCK (wrklock); |
|
|
1093 | assert (!dents); |
|
|
1094 | req->ptr1 = 0; |
|
|
1095 | req->ptr2 = names; |
|
|
1096 | X_UNLOCK (wrklock); |
|
|
1097 | } |
|
|
1098 | |
1713 | |
1099 | break; |
1714 | break; |
1100 | } |
1715 | } |
1101 | |
1716 | |
1102 | /* now add the entry to our list(s) */ |
1717 | /* now add the entry to our list(s) */ |
… | |
… | |
1105 | /* skip . and .. entries */ |
1720 | /* skip . and .. entries */ |
1106 | if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
1721 | if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
1107 | { |
1722 | { |
1108 | int len = D_NAMLEN (entp) + 1; |
1723 | int len = D_NAMLEN (entp) + 1; |
1109 | |
1724 | |
1110 | while (expect_false (namesoffs + len > namesalloc)) |
1725 | while (ecb_expect_false (namesoffs + len > namesalloc)) |
1111 | { |
1726 | { |
1112 | namesalloc *= 2; |
1727 | namesalloc *= 2; |
1113 | X_LOCK (wrklock); |
1728 | X_LOCK (wrklock); |
1114 | req->ptr1 = names = realloc (names, namesalloc); |
1729 | req->ptr2 = names = realloc (names, namesalloc); |
1115 | X_UNLOCK (wrklock); |
1730 | X_UNLOCK (wrklock); |
1116 | |
1731 | |
1117 | if (!names) |
1732 | if (!names) |
1118 | break; |
1733 | break; |
1119 | } |
1734 | } |
… | |
… | |
1122 | |
1737 | |
1123 | if (dents) |
1738 | if (dents) |
1124 | { |
1739 | { |
1125 | struct eio_dirent *ent; |
1740 | struct eio_dirent *ent; |
1126 | |
1741 | |
1127 | if (expect_false (dentoffs == dentalloc)) |
1742 | if (ecb_expect_false (dentoffs == dentalloc)) |
1128 | { |
1743 | { |
1129 | dentalloc *= 2; |
1744 | dentalloc *= 2; |
1130 | X_LOCK (wrklock); |
1745 | X_LOCK (wrklock); |
1131 | req->ptr2 = dents = realloc (dents, dentalloc * sizeof (eio_dirent)); |
1746 | req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent)); |
1132 | X_UNLOCK (wrklock); |
1747 | X_UNLOCK (wrklock); |
1133 | |
1748 | |
1134 | if (!dents) |
1749 | if (!dents) |
1135 | break; |
1750 | break; |
1136 | } |
1751 | } |
1137 | |
1752 | |
1138 | ent = dents + dentoffs; |
1753 | ent = dents + dentoffs; |
1139 | |
1754 | |
1140 | ent->name = (char *)(size_t)namesoffs; /* rather dirtily we store the offset in the pointer */ |
1755 | ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */ |
1141 | ent->namelen = len - 1; |
1756 | ent->namelen = len - 1; |
1142 | ent->inode = D_INO (entp); |
1757 | ent->inode = D_INO (entp); |
|
|
1758 | |
|
|
1759 | inode_bits |= ent->inode; |
1143 | |
1760 | |
1144 | switch (D_TYPE (entp)) |
1761 | switch (D_TYPE (entp)) |
1145 | { |
1762 | { |
1146 | default: |
1763 | default: |
1147 | ent->type = EIO_DT_UNKNOWN; |
1764 | ent->type = EIO_DT_UNKNOWN; |
… | |
… | |
1190 | #ifdef DT_WHT |
1807 | #ifdef DT_WHT |
1191 | case DT_WHT: ent->type = EIO_DT_WHT; break; |
1808 | case DT_WHT: ent->type = EIO_DT_WHT; break; |
1192 | #endif |
1809 | #endif |
1193 | } |
1810 | } |
1194 | |
1811 | |
1195 | ent->score = 0; |
1812 | ent->score = 7; |
1196 | |
1813 | |
1197 | if (flags & EIO_READDIR_DIRS_FIRST) |
1814 | if (flags & EIO_READDIR_DIRS_FIRST) |
1198 | { |
1815 | { |
1199 | if (ent->type == EIO_DT_UNKNOWN) |
1816 | if (ent->type == EIO_DT_UNKNOWN) |
1200 | { |
1817 | { |
1201 | if (*name == '.') /* leading dots are likely directories, and, in any case, rare */ |
1818 | if (*name == '.') /* leading dots are likely directories, and, in any case, rare */ |
1202 | ent->score = 98; |
1819 | ent->score = 1; |
1203 | else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */ |
1820 | else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */ |
1204 | ent->score = len <= 2 ? len + 60 : len <= 4 ? 50 : len <= 7 ? 40 : 10; /* shorter == more likely dir, but avoid too many classes */ |
1821 | ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */ |
1205 | } |
1822 | } |
1206 | else if (ent->type == EIO_DT_DIR) |
1823 | else if (ent->type == EIO_DT_DIR) |
1207 | ent->score = 100; |
1824 | ent->score = 0; |
1208 | } |
1825 | } |
1209 | } |
1826 | } |
1210 | |
1827 | |
1211 | namesoffs += len; |
1828 | namesoffs += len; |
1212 | ++dentoffs; |
1829 | ++dentoffs; |
1213 | } |
1830 | } |
|
|
1831 | |
|
|
1832 | if (EIO_CANCELLED (req)) |
|
|
1833 | { |
|
|
1834 | errno = ECANCELED; |
|
|
1835 | break; |
|
|
1836 | } |
1214 | } |
1837 | } |
1215 | else |
|
|
1216 | req->result = -1; |
|
|
1217 | } |
|
|
1218 | |
|
|
1219 | #if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO) |
|
|
1220 | # undef msync |
|
|
1221 | # define msync(a,b,c) ((errno = ENOSYS), -1) |
|
|
1222 | #endif |
|
|
1223 | |
|
|
1224 | int |
|
|
1225 | eio__mtouch (void *mem, size_t len, int flags) |
|
|
1226 | { |
|
|
1227 | intptr_t addr = (intptr_t)mem; |
|
|
1228 | intptr_t end = addr + len; |
|
|
1229 | #ifdef PAGESIZE |
|
|
1230 | const intptr_t page = PAGESIZE; |
|
|
1231 | #else |
|
|
1232 | static intptr_t page; |
|
|
1233 | |
|
|
1234 | if (!page) |
|
|
1235 | page = sysconf (_SC_PAGESIZE); |
|
|
1236 | #endif |
|
|
1237 | |
|
|
1238 | addr &= ~(page - 1); /* assume page size is always a power of two */ |
|
|
1239 | |
|
|
1240 | if (addr < end) |
|
|
1241 | if (flags) /* modify */ |
|
|
1242 | do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len); |
|
|
1243 | else |
|
|
1244 | do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len); |
|
|
1245 | |
|
|
1246 | return 0; |
|
|
1247 | } |
1838 | } |
1248 | |
1839 | |
1249 | /*****************************************************************************/ |
1840 | /*****************************************************************************/ |
1250 | |
1841 | |
1251 | #define ALLOC(len) \ |
1842 | #define ALLOC(len) \ |
… | |
… | |
1266 | X_THREAD_PROC (etp_proc) |
1857 | X_THREAD_PROC (etp_proc) |
1267 | { |
1858 | { |
1268 | ETP_REQ *req; |
1859 | ETP_REQ *req; |
1269 | struct timespec ts; |
1860 | struct timespec ts; |
1270 | etp_worker *self = (etp_worker *)thr_arg; |
1861 | etp_worker *self = (etp_worker *)thr_arg; |
|
|
1862 | int timeout; |
1271 | |
1863 | |
1272 | /* try to distribute timeouts somewhat randomly */ |
1864 | /* try to distribute timeouts somewhat evenly */ |
1273 | ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL); |
1865 | ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL); |
1274 | |
1866 | |
1275 | for (;;) |
1867 | for (;;) |
1276 | { |
1868 | { |
|
|
1869 | ts.tv_sec = 0; |
|
|
1870 | |
1277 | X_LOCK (reqlock); |
1871 | X_LOCK (reqlock); |
1278 | |
1872 | |
1279 | for (;;) |
1873 | for (;;) |
1280 | { |
1874 | { |
1281 | self->req = req = reqq_shift (&req_queue); |
1875 | self->req = req = reqq_shift (&req_queue); |
1282 | |
1876 | |
1283 | if (req) |
1877 | if (req) |
1284 | break; |
1878 | break; |
1285 | |
1879 | |
|
|
1880 | if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */ |
|
|
1881 | { |
|
|
1882 | X_UNLOCK (reqlock); |
|
|
1883 | X_LOCK (wrklock); |
|
|
1884 | --started; |
|
|
1885 | X_UNLOCK (wrklock); |
|
|
1886 | goto quit; |
|
|
1887 | } |
|
|
1888 | |
1286 | ++idle; |
1889 | ++idle; |
1287 | |
1890 | |
1288 | ts.tv_sec = time (0) + IDLE_TIMEOUT; |
1891 | if (idle <= max_idle) |
1289 | if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT) |
1892 | /* we are allowed to idle, so do so without any timeout */ |
|
|
1893 | X_COND_WAIT (reqwait, reqlock); |
|
|
1894 | else |
1290 | { |
1895 | { |
1291 | if (idle > max_idle) |
1896 | /* initialise timeout once */ |
1292 | { |
1897 | if (!ts.tv_sec) |
1293 | --idle; |
1898 | ts.tv_sec = time (0) + idle_timeout; |
1294 | X_UNLOCK (reqlock); |
|
|
1295 | X_LOCK (wrklock); |
|
|
1296 | --started; |
|
|
1297 | X_UNLOCK (wrklock); |
|
|
1298 | goto quit; |
|
|
1299 | } |
|
|
1300 | |
1899 | |
1301 | /* we are allowed to idle, so do so without any timeout */ |
|
|
1302 | X_COND_WAIT (reqwait, reqlock); |
1900 | if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT) |
|
|
1901 | ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */ |
1303 | } |
1902 | } |
1304 | |
1903 | |
1305 | --idle; |
1904 | --idle; |
1306 | } |
1905 | } |
1307 | |
1906 | |
… | |
… | |
1310 | X_UNLOCK (reqlock); |
1909 | X_UNLOCK (reqlock); |
1311 | |
1910 | |
1312 | if (req->type < 0) |
1911 | if (req->type < 0) |
1313 | goto quit; |
1912 | goto quit; |
1314 | |
1913 | |
1315 | if (!EIO_CANCELLED (req)) |
|
|
1316 | ETP_EXECUTE (self, req); |
1914 | ETP_EXECUTE (self, req); |
1317 | |
1915 | |
1318 | X_LOCK (reslock); |
1916 | X_LOCK (reslock); |
1319 | |
1917 | |
1320 | ++npending; |
1918 | ++npending; |
1321 | |
1919 | |
… | |
… | |
1336 | return 0; |
1934 | return 0; |
1337 | } |
1935 | } |
1338 | |
1936 | |
1339 | /*****************************************************************************/ |
1937 | /*****************************************************************************/ |
1340 | |
1938 | |
|
|
1939 | int ecb_cold |
1341 | int eio_init (void (*want_poll)(void), void (*done_poll)(void)) |
1940 | eio_init (void (*want_poll)(void), void (*done_poll)(void)) |
1342 | { |
1941 | { |
1343 | return etp_init (want_poll, done_poll); |
1942 | return etp_init (want_poll, done_poll); |
1344 | } |
1943 | } |
1345 | |
1944 | |
|
|
1945 | ecb_inline void |
1346 | static void eio_api_destroy (eio_req *req) |
1946 | eio_api_destroy (eio_req *req) |
1347 | { |
1947 | { |
1348 | free (req); |
1948 | free (req); |
1349 | } |
1949 | } |
1350 | |
1950 | |
1351 | #define REQ(rtype) \ |
1951 | #define REQ(rtype) \ |
… | |
… | |
1370 | { \ |
1970 | { \ |
1371 | eio_api_destroy (req); \ |
1971 | eio_api_destroy (req); \ |
1372 | return 0; \ |
1972 | return 0; \ |
1373 | } |
1973 | } |
1374 | |
1974 | |
|
|
1975 | static void |
1375 | static void eio_execute (etp_worker *self, eio_req *req) |
1976 | eio_execute (etp_worker *self, eio_req *req) |
1376 | { |
1977 | { |
1377 | errno = 0; |
1978 | if (ecb_expect_false (EIO_CANCELLED (req))) |
|
|
1979 | { |
|
|
1980 | req->result = -1; |
|
|
1981 | req->errorno = ECANCELED; |
|
|
1982 | return; |
|
|
1983 | } |
1378 | |
1984 | |
1379 | switch (req->type) |
1985 | switch (req->type) |
1380 | { |
1986 | { |
1381 | case EIO_READ: ALLOC (req->size); |
1987 | case EIO_READ: ALLOC (req->size); |
1382 | req->result = req->offs >= 0 |
1988 | req->result = req->offs >= 0 |
… | |
… | |
1394 | case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); |
2000 | case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); |
1395 | req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break; |
2001 | req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break; |
1396 | case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); |
2002 | case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); |
1397 | req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break; |
2003 | req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break; |
1398 | |
2004 | |
|
|
2005 | case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); |
|
|
2006 | req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break; |
|
|
2007 | case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); |
|
|
2008 | req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break; |
|
|
2009 | |
1399 | case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break; |
2010 | case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break; |
1400 | case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break; |
2011 | case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break; |
1401 | case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break; |
2012 | case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break; |
1402 | case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break; |
2013 | case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break; |
1403 | case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break; |
2014 | case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break; |
… | |
… | |
1410 | case EIO_RMDIR: req->result = rmdir (req->ptr1); break; |
2021 | case EIO_RMDIR: req->result = rmdir (req->ptr1); break; |
1411 | case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break; |
2022 | case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break; |
1412 | case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break; |
2023 | case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break; |
1413 | case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break; |
2024 | case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break; |
1414 | case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break; |
2025 | case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break; |
1415 | case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->int3); break; |
2026 | case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break; |
1416 | |
2027 | |
|
|
2028 | case EIO_REALPATH: eio__realpath (req, self); break; |
|
|
2029 | |
1417 | case EIO_READLINK: ALLOC (NAME_MAX); |
2030 | case EIO_READLINK: ALLOC (PATH_MAX); |
1418 | req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break; |
2031 | req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break; |
1419 | |
2032 | |
1420 | case EIO_SYNC: req->result = 0; sync (); break; |
2033 | case EIO_SYNC: req->result = 0; sync (); break; |
1421 | case EIO_FSYNC: req->result = fsync (req->int1); break; |
2034 | case EIO_FSYNC: req->result = fsync (req->int1); break; |
1422 | case EIO_FDATASYNC: req->result = fdatasync (req->int1); break; |
2035 | case EIO_FDATASYNC: req->result = fdatasync (req->int1); break; |
1423 | case EIO_MSYNC: req->result = msync (req->ptr2, req->size, req->int1); break; |
2036 | case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break; |
|
|
2037 | case EIO_MTOUCH: req->result = eio__mtouch (req); break; |
1424 | case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break; |
2038 | case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break; |
|
|
2039 | case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break; |
1425 | case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break; |
2040 | case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break; |
|
|
2041 | case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break; |
1426 | |
2042 | |
1427 | case EIO_READDIR: eio__scandir (req, self); break; |
2043 | case EIO_READDIR: eio__scandir (req, self); break; |
1428 | |
2044 | |
1429 | case EIO_BUSY: |
2045 | case EIO_BUSY: |
1430 | #ifdef _WIN32 |
2046 | #ifdef _WIN32 |
1431 | Sleep (req->nv1 * 1000.); |
2047 | Sleep (req->nv1 * 1e3); |
1432 | #else |
2048 | #else |
1433 | { |
2049 | { |
1434 | struct timeval tv; |
2050 | struct timeval tv; |
1435 | |
2051 | |
1436 | tv.tv_sec = req->nv1; |
2052 | tv.tv_sec = req->nv1; |
1437 | tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.; |
2053 | tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6; |
1438 | |
2054 | |
1439 | req->result = select (0, 0, 0, 0, &tv); |
2055 | req->result = select (0, 0, 0, 0, &tv); |
1440 | } |
2056 | } |
1441 | #endif |
2057 | #endif |
1442 | break; |
2058 | break; |
… | |
… | |
1457 | times = tv; |
2073 | times = tv; |
1458 | } |
2074 | } |
1459 | else |
2075 | else |
1460 | times = 0; |
2076 | times = 0; |
1461 | |
2077 | |
1462 | |
|
|
1463 | req->result = req->type == EIO_FUTIME |
2078 | req->result = req->type == EIO_FUTIME |
1464 | ? futimes (req->int1, times) |
2079 | ? futimes (req->int1, times) |
1465 | : utimes (req->ptr1, times); |
2080 | : utimes (req->ptr1, times); |
1466 | } |
2081 | } |
1467 | break; |
2082 | break; |
… | |
… | |
1472 | case EIO_NOP: |
2087 | case EIO_NOP: |
1473 | req->result = 0; |
2088 | req->result = 0; |
1474 | break; |
2089 | break; |
1475 | |
2090 | |
1476 | case EIO_CUSTOM: |
2091 | case EIO_CUSTOM: |
1477 | ((void (*)(eio_req *))req->feed) (req); |
2092 | req->feed (req); |
1478 | break; |
2093 | break; |
1479 | |
2094 | |
1480 | default: |
2095 | default: |
|
|
2096 | errno = ENOSYS; |
1481 | req->result = -1; |
2097 | req->result = -1; |
1482 | break; |
2098 | break; |
1483 | } |
2099 | } |
1484 | |
2100 | |
1485 | req->errorno = errno; |
2101 | req->errorno = errno; |
… | |
… | |
1515 | eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data) |
2131 | eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data) |
1516 | { |
2132 | { |
1517 | REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND; |
2133 | REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND; |
1518 | } |
2134 | } |
1519 | |
2135 | |
|
|
2136 | eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data) |
|
|
2137 | { |
|
|
2138 | REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND; |
|
|
2139 | } |
|
|
2140 | |
|
|
2141 | eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data) |
|
|
2142 | { |
|
|
2143 | REQ (EIO_MLOCKALL); req->int1 = flags; SEND; |
|
|
2144 | } |
|
|
2145 | |
1520 | eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data) |
2146 | eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data) |
1521 | { |
2147 | { |
1522 | REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND; |
2148 | REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND; |
1523 | } |
2149 | } |
1524 | |
2150 | |
|
|
2151 | eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data) |
|
|
2152 | { |
|
|
2153 | REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND; |
|
|
2154 | } |
|
|
2155 | |
1525 | eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data) |
2156 | eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data) |
1526 | { |
2157 | { |
1527 | REQ (EIO_FDATASYNC); req->int1 = fd; SEND; |
2158 | REQ (EIO_FDATASYNC); req->int1 = fd; SEND; |
1528 | } |
2159 | } |
1529 | |
2160 | |
… | |
… | |
1550 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data) |
2181 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data) |
1551 | { |
2182 | { |
1552 | REQ (EIO_FSTAT); req->int1 = fd; SEND; |
2183 | REQ (EIO_FSTAT); req->int1 = fd; SEND; |
1553 | } |
2184 | } |
1554 | |
2185 | |
|
|
2186 | eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data) |
|
|
2187 | { |
|
|
2188 | REQ (EIO_FSTATVFS); req->int1 = fd; SEND; |
|
|
2189 | } |
|
|
2190 | |
1555 | eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data) |
2191 | eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data) |
1556 | { |
2192 | { |
1557 | REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND; |
2193 | REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND; |
1558 | } |
2194 | } |
1559 | |
2195 | |
… | |
… | |
1565 | eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data) |
2201 | eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data) |
1566 | { |
2202 | { |
1567 | REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND; |
2203 | REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND; |
1568 | } |
2204 | } |
1569 | |
2205 | |
1570 | eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data) |
2206 | eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data) |
1571 | { |
2207 | { |
1572 | REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND; |
2208 | REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND; |
1573 | } |
2209 | } |
1574 | |
2210 | |
1575 | eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data) |
2211 | eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data) |
… | |
… | |
1595 | eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data) |
2231 | eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data) |
1596 | { |
2232 | { |
1597 | REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND; |
2233 | REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND; |
1598 | } |
2234 | } |
1599 | |
2235 | |
1600 | eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data) |
2236 | eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data) |
1601 | { |
2237 | { |
1602 | REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND; |
2238 | REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND; |
1603 | } |
2239 | } |
1604 | |
2240 | |
1605 | eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data) |
2241 | eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data) |
… | |
… | |
1621 | eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data) |
2257 | eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data) |
1622 | { |
2258 | { |
1623 | return eio__1path (EIO_READLINK, path, pri, cb, data); |
2259 | return eio__1path (EIO_READLINK, path, pri, cb, data); |
1624 | } |
2260 | } |
1625 | |
2261 | |
|
|
2262 | eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data) |
|
|
2263 | { |
|
|
2264 | return eio__1path (EIO_REALPATH, path, pri, cb, data); |
|
|
2265 | } |
|
|
2266 | |
1626 | eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data) |
2267 | eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data) |
1627 | { |
2268 | { |
1628 | return eio__1path (EIO_STAT, path, pri, cb, data); |
2269 | return eio__1path (EIO_STAT, path, pri, cb, data); |
1629 | } |
2270 | } |
1630 | |
2271 | |
1631 | eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data) |
2272 | eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data) |
1632 | { |
2273 | { |
1633 | return eio__1path (EIO_LSTAT, path, pri, cb, data); |
2274 | return eio__1path (EIO_LSTAT, path, pri, cb, data); |
1634 | } |
2275 | } |
1635 | |
2276 | |
|
|
2277 | eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data) |
|
|
2278 | { |
|
|
2279 | return eio__1path (EIO_STATVFS, path, pri, cb, data); |
|
|
2280 | } |
|
|
2281 | |
1636 | eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data) |
2282 | eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data) |
1637 | { |
2283 | { |
1638 | return eio__1path (EIO_UNLINK, path, pri, cb, data); |
2284 | return eio__1path (EIO_UNLINK, path, pri, cb, data); |
1639 | } |
2285 | } |
1640 | |
2286 | |
… | |
… | |
1648 | REQ (EIO_READDIR); PATH; req->int1 = flags; SEND; |
2294 | REQ (EIO_READDIR); PATH; req->int1 = flags; SEND; |
1649 | } |
2295 | } |
1650 | |
2296 | |
1651 | eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data) |
2297 | eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data) |
1652 | { |
2298 | { |
1653 | REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND; |
2299 | REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND; |
1654 | } |
2300 | } |
1655 | |
2301 | |
1656 | static eio_req * |
2302 | static eio_req * |
1657 | eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
2303 | eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
1658 | { |
2304 | { |
… | |
… | |
1682 | eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
2328 | eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
1683 | { |
2329 | { |
1684 | return eio__2path (EIO_RENAME, path, new_path, pri, cb, data); |
2330 | return eio__2path (EIO_RENAME, path, new_path, pri, cb, data); |
1685 | } |
2331 | } |
1686 | |
2332 | |
1687 | eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data) |
2333 | eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data) |
1688 | { |
2334 | { |
1689 | REQ (EIO_CUSTOM); req->feed = (void (*)(eio_req *))execute; SEND; |
2335 | REQ (EIO_CUSTOM); req->feed = execute; SEND; |
1690 | } |
2336 | } |
1691 | |
2337 | |
1692 | #endif |
2338 | #endif |
1693 | |
2339 | |
1694 | eio_req *eio_grp (eio_cb cb, void *data) |
2340 | eio_req *eio_grp (eio_cb cb, void *data) |
… | |
… | |
1703 | #undef SEND |
2349 | #undef SEND |
1704 | |
2350 | |
1705 | /*****************************************************************************/ |
2351 | /*****************************************************************************/ |
1706 | /* grp functions */ |
2352 | /* grp functions */ |
1707 | |
2353 | |
|
|
2354 | void |
1708 | void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit) |
2355 | eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit) |
1709 | { |
2356 | { |
1710 | grp->int2 = limit; |
2357 | grp->int2 = limit; |
1711 | grp->feed = feed; |
2358 | grp->feed = feed; |
1712 | |
2359 | |
1713 | grp_try_feed (grp); |
2360 | grp_try_feed (grp); |
1714 | } |
2361 | } |
1715 | |
2362 | |
|
|
2363 | void |
1716 | void eio_grp_limit (eio_req *grp, int limit) |
2364 | eio_grp_limit (eio_req *grp, int limit) |
1717 | { |
2365 | { |
1718 | grp->int2 = limit; |
2366 | grp->int2 = limit; |
1719 | |
2367 | |
1720 | grp_try_feed (grp); |
2368 | grp_try_feed (grp); |
1721 | } |
2369 | } |
1722 | |
2370 | |
|
|
2371 | void |
1723 | void eio_grp_add (eio_req *grp, eio_req *req) |
2372 | eio_grp_add (eio_req *grp, eio_req *req) |
1724 | { |
2373 | { |
1725 | assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2)); |
2374 | assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2)); |
1726 | |
2375 | |
1727 | grp->flags |= EIO_FLAG_GROUPADD; |
2376 | grp->flags |= EIO_FLAG_GROUPADD; |
1728 | |
2377 | |
… | |
… | |
1739 | } |
2388 | } |
1740 | |
2389 | |
1741 | /*****************************************************************************/ |
2390 | /*****************************************************************************/ |
1742 | /* misc garbage */ |
2391 | /* misc garbage */ |
1743 | |
2392 | |
|
|
2393 | eio_ssize_t |
1744 | ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count) |
2394 | eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count) |
1745 | { |
2395 | { |
1746 | etp_worker wrk; |
2396 | etp_worker wrk; |
|
|
2397 | eio_ssize_t ret; |
1747 | |
2398 | |
1748 | wrk.dbuf = 0; |
2399 | wrk.dbuf = 0; |
1749 | |
2400 | |
1750 | eio__sendfile (ofd, ifd, offset, count, &wrk); |
2401 | ret = eio__sendfile (ofd, ifd, offset, count, &wrk); |
1751 | |
2402 | |
1752 | if (wrk.dbuf) |
2403 | if (wrk.dbuf) |
1753 | free (wrk.dbuf); |
2404 | free (wrk.dbuf); |
1754 | } |
|
|
1755 | |
2405 | |
|
|
2406 | return ret; |
|
|
2407 | } |
|
|
2408 | |