| … | |
… | |
| 127 | .\} |
127 | .\} |
| 128 | .rm #[ #] #H #V #F C |
128 | .rm #[ #] #H #V #F C |
| 129 | .\" ======================================================================== |
129 | .\" ======================================================================== |
| 130 | .\" |
130 | .\" |
| 131 | .IX Title ""<STANDARD INPUT>" 1" |
131 | .IX Title ""<STANDARD INPUT>" 1" |
| 132 | .TH "<STANDARD INPUT>" 1 "2007-11-26" "perl v5.8.8" "User Contributed Perl Documentation" |
132 | .TH "<STANDARD INPUT>" 1 "2007-11-27" "perl v5.8.8" "User Contributed Perl Documentation" |
| 133 | .SH "NAME" |
133 | .SH "NAME" |
| 134 | libev \- a high performance full\-featured event loop written in C |
134 | libev \- a high performance full\-featured event loop written in C |
| 135 | .SH "SYNOPSIS" |
135 | .SH "SYNOPSIS" |
| 136 | .IX Header "SYNOPSIS" |
136 | .IX Header "SYNOPSIS" |
| 137 | .Vb 1 |
137 | .Vb 1 |
| … | |
… | |
| 684 | The signal specified in the \f(CW\*(C`ev_signal\*(C'\fR watcher has been received by a thread. |
684 | The signal specified in the \f(CW\*(C`ev_signal\*(C'\fR watcher has been received by a thread. |
| 685 | .ie n .IP """EV_CHILD""" 4 |
685 | .ie n .IP """EV_CHILD""" 4 |
| 686 | .el .IP "\f(CWEV_CHILD\fR" 4 |
686 | .el .IP "\f(CWEV_CHILD\fR" 4 |
| 687 | .IX Item "EV_CHILD" |
687 | .IX Item "EV_CHILD" |
| 688 | The pid specified in the \f(CW\*(C`ev_child\*(C'\fR watcher has received a status change. |
688 | The pid specified in the \f(CW\*(C`ev_child\*(C'\fR watcher has received a status change. |
|
|
689 | .ie n .IP """EV_STAT""" 4 |
|
|
690 | .el .IP "\f(CWEV_STAT\fR" 4 |
|
|
691 | .IX Item "EV_STAT" |
|
|
692 | The path specified in the \f(CW\*(C`ev_stat\*(C'\fR watcher changed its attributes somehow. |
| 689 | .ie n .IP """EV_IDLE""" 4 |
693 | .ie n .IP """EV_IDLE""" 4 |
| 690 | .el .IP "\f(CWEV_IDLE\fR" 4 |
694 | .el .IP "\f(CWEV_IDLE\fR" 4 |
| 691 | .IX Item "EV_IDLE" |
695 | .IX Item "EV_IDLE" |
| 692 | The \f(CW\*(C`ev_idle\*(C'\fR watcher has determined that you have nothing better to do. |
696 | The \f(CW\*(C`ev_idle\*(C'\fR watcher has determined that you have nothing better to do. |
| 693 | .ie n .IP """EV_PREPARE""" 4 |
697 | .ie n .IP """EV_PREPARE""" 4 |
| … | |
… | |
| 821 | More interesting and less C\-conformant ways of catsing your callback type |
825 | More interesting and less C\-conformant ways of catsing your callback type |
| 822 | have been omitted.... |
826 | have been omitted.... |
| 823 | .SH "WATCHER TYPES" |
827 | .SH "WATCHER TYPES" |
| 824 | .IX Header "WATCHER TYPES" |
828 | .IX Header "WATCHER TYPES" |
| 825 | This section describes each watcher in detail, but will not repeat |
829 | This section describes each watcher in detail, but will not repeat |
| 826 | information given in the last section. |
830 | information given in the last section. Any initialisation/set macros, |
|
|
831 | functions and members specific to the watcher type are explained. |
|
|
832 | .PP |
|
|
833 | Members are additionally marked with either \fI[read\-only]\fR, meaning that, |
|
|
834 | while the watcher is active, you can look at the member and expect some |
|
|
835 | sensible content, but you must not modify it (you can modify it while the |
|
|
836 | watcher is stopped to your hearts content), or \fI[read\-write]\fR, which |
|
|
837 | means you can expect it to have some sensible content while the watcher |
|
|
838 | is active, but you can also modify it. Modifying it may not do something |
|
|
839 | sensible or take immediate effect (or do anything at all), but libev will |
|
|
840 | not crash or malfunction in any way. |
| 827 | .ie n .Sh """ev_io"" \- is this file descriptor readable or writable?" |
841 | .ie n .Sh """ev_io"" \- is this file descriptor readable or writable?" |
| 828 | .el .Sh "\f(CWev_io\fP \- is this file descriptor readable or writable?" |
842 | .el .Sh "\f(CWev_io\fP \- is this file descriptor readable or writable?" |
| 829 | .IX Subsection "ev_io - is this file descriptor readable or writable?" |
843 | .IX Subsection "ev_io - is this file descriptor readable or writable?" |
| 830 | I/O watchers check whether a file descriptor is readable or writable |
844 | I/O watchers check whether a file descriptor is readable or writable |
| 831 | in each iteration of the event loop, or, more precisely, when reading |
845 | in each iteration of the event loop, or, more precisely, when reading |
| … | |
… | |
| 871 | .IX Item "ev_io_set (ev_io *, int fd, int events)" |
885 | .IX Item "ev_io_set (ev_io *, int fd, int events)" |
| 872 | .PD |
886 | .PD |
| 873 | Configures an \f(CW\*(C`ev_io\*(C'\fR watcher. The \f(CW\*(C`fd\*(C'\fR is the file descriptor to |
887 | Configures an \f(CW\*(C`ev_io\*(C'\fR watcher. The \f(CW\*(C`fd\*(C'\fR is the file descriptor to |
| 874 | rceeive events for and events is either \f(CW\*(C`EV_READ\*(C'\fR, \f(CW\*(C`EV_WRITE\*(C'\fR or |
888 | rceeive events for and events is either \f(CW\*(C`EV_READ\*(C'\fR, \f(CW\*(C`EV_WRITE\*(C'\fR or |
| 875 | \&\f(CW\*(C`EV_READ | EV_WRITE\*(C'\fR to receive the given events. |
889 | \&\f(CW\*(C`EV_READ | EV_WRITE\*(C'\fR to receive the given events. |
|
|
890 | .IP "int fd [read\-only]" 4 |
|
|
891 | .IX Item "int fd [read-only]" |
|
|
892 | The file descriptor being watched. |
|
|
893 | .IP "int events [read\-only]" 4 |
|
|
894 | .IX Item "int events [read-only]" |
|
|
895 | The events being watched. |
| 876 | .PP |
896 | .PP |
| 877 | Example: call \f(CW\*(C`stdin_readable_cb\*(C'\fR when \s-1STDIN_FILENO\s0 has become, well |
897 | Example: call \f(CW\*(C`stdin_readable_cb\*(C'\fR when \s-1STDIN_FILENO\s0 has become, well |
| 878 | readable, but only once. Since it is likely line\-buffered, you could |
898 | readable, but only once. Since it is likely line\-buffered, you could |
| 879 | attempt to read a whole line in the callback: |
899 | attempt to read a whole line in the callback: |
| 880 | .PP |
900 | .PP |
| … | |
… | |
| 945 | .Sp |
965 | .Sp |
| 946 | If the timer is repeating, either start it if necessary (with the repeat |
966 | If the timer is repeating, either start it if necessary (with the repeat |
| 947 | value), or reset the running timer to the repeat value. |
967 | value), or reset the running timer to the repeat value. |
| 948 | .Sp |
968 | .Sp |
| 949 | This sounds a bit complicated, but here is a useful and typical |
969 | This sounds a bit complicated, but here is a useful and typical |
| 950 | example: Imagine you have a tcp connection and you want a so-called idle |
970 | example: Imagine you have a tcp connection and you want a so-called |
| 951 | timeout, that is, you want to be called when there have been, say, 60 |
971 | idle timeout, that is, you want to be called when there have been, |
| 952 | seconds of inactivity on the socket. The easiest way to do this is to |
972 | say, 60 seconds of inactivity on the socket. The easiest way to do |
| 953 | configure an \f(CW\*(C`ev_timer\*(C'\fR with after=repeat=60 and calling ev_timer_again each |
973 | this is to configure an \f(CW\*(C`ev_timer\*(C'\fR with \f(CW\*(C`after\*(C'\fR=\f(CW\*(C`repeat\*(C'\fR=\f(CW60\fR and calling |
| 954 | time you successfully read or write some data. If you go into an idle |
974 | \&\f(CW\*(C`ev_timer_again\*(C'\fR each time you successfully read or write some data. If |
| 955 | state where you do not expect data to travel on the socket, you can stop |
975 | you go into an idle state where you do not expect data to travel on the |
| 956 | the timer, and again will automatically restart it if need be. |
976 | socket, you can stop the timer, and again will automatically restart it if |
|
|
977 | need be. |
|
|
978 | .Sp |
|
|
979 | You can also ignore the \f(CW\*(C`after\*(C'\fR value and \f(CW\*(C`ev_timer_start\*(C'\fR altogether |
|
|
980 | and only ever use the \f(CW\*(C`repeat\*(C'\fR value: |
|
|
981 | .Sp |
|
|
982 | .Vb 8 |
|
|
983 | \& ev_timer_init (timer, callback, 0., 5.); |
|
|
984 | \& ev_timer_again (loop, timer); |
|
|
985 | \& ... |
|
|
986 | \& timer->again = 17.; |
|
|
987 | \& ev_timer_again (loop, timer); |
|
|
988 | \& ... |
|
|
989 | \& timer->again = 10.; |
|
|
990 | \& ev_timer_again (loop, timer); |
|
|
991 | .Ve |
|
|
992 | .Sp |
|
|
993 | This is more efficient then stopping/starting the timer eahc time you want |
|
|
994 | to modify its timeout value. |
|
|
995 | .IP "ev_tstamp repeat [read\-write]" 4 |
|
|
996 | .IX Item "ev_tstamp repeat [read-write]" |
|
|
997 | The current \f(CW\*(C`repeat\*(C'\fR value. Will be used each time the watcher times out |
|
|
998 | or \f(CW\*(C`ev_timer_again\*(C'\fR is called and determines the next timeout (if any), |
|
|
999 | which is also when any modifications are taken into account. |
| 957 | .PP |
1000 | .PP |
| 958 | Example: create a timer that fires after 60 seconds. |
1001 | Example: create a timer that fires after 60 seconds. |
| 959 | .PP |
1002 | .PP |
| 960 | .Vb 5 |
1003 | .Vb 5 |
| 961 | \& static void |
1004 | \& static void |
| … | |
… | |
| 1093 | .IX Item "ev_periodic_again (loop, ev_periodic *)" |
1136 | .IX Item "ev_periodic_again (loop, ev_periodic *)" |
| 1094 | Simply stops and restarts the periodic watcher again. This is only useful |
1137 | Simply stops and restarts the periodic watcher again. This is only useful |
| 1095 | when you changed some parameters or the reschedule callback would return |
1138 | when you changed some parameters or the reschedule callback would return |
| 1096 | a different time than the last time it was called (e.g. in a crond like |
1139 | a different time than the last time it was called (e.g. in a crond like |
| 1097 | program when the crontabs have changed). |
1140 | program when the crontabs have changed). |
|
|
1141 | .IP "ev_tstamp interval [read\-write]" 4 |
|
|
1142 | .IX Item "ev_tstamp interval [read-write]" |
|
|
1143 | The current interval value. Can be modified any time, but changes only |
|
|
1144 | take effect when the periodic timer fires or \f(CW\*(C`ev_periodic_again\*(C'\fR is being |
|
|
1145 | called. |
|
|
1146 | .IP "ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now) [read\-write]" 4 |
|
|
1147 | .IX Item "ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now) [read-write]" |
|
|
1148 | The current reschedule callback, or \f(CW0\fR, if this functionality is |
|
|
1149 | switched off. Can be changed any time, but changes only take effect when |
|
|
1150 | the periodic timer fires or \f(CW\*(C`ev_periodic_again\*(C'\fR is being called. |
| 1098 | .PP |
1151 | .PP |
| 1099 | Example: call a callback every hour, or, more precisely, whenever the |
1152 | Example: call a callback every hour, or, more precisely, whenever the |
| 1100 | system clock is divisible by 3600. The callback invocation times have |
1153 | system clock is divisible by 3600. The callback invocation times have |
| 1101 | potentially a lot of jittering, but good long-term stability. |
1154 | potentially a lot of jittering, but good long-term stability. |
| 1102 | .PP |
1155 | .PP |
| … | |
… | |
| 1160 | .IP "ev_signal_set (ev_signal *, int signum)" 4 |
1213 | .IP "ev_signal_set (ev_signal *, int signum)" 4 |
| 1161 | .IX Item "ev_signal_set (ev_signal *, int signum)" |
1214 | .IX Item "ev_signal_set (ev_signal *, int signum)" |
| 1162 | .PD |
1215 | .PD |
| 1163 | Configures the watcher to trigger on the given signal number (usually one |
1216 | Configures the watcher to trigger on the given signal number (usually one |
| 1164 | of the \f(CW\*(C`SIGxxx\*(C'\fR constants). |
1217 | of the \f(CW\*(C`SIGxxx\*(C'\fR constants). |
|
|
1218 | .IP "int signum [read\-only]" 4 |
|
|
1219 | .IX Item "int signum [read-only]" |
|
|
1220 | The signal the watcher watches out for. |
| 1165 | .ie n .Sh """ev_child"" \- watch out for process status changes" |
1221 | .ie n .Sh """ev_child"" \- watch out for process status changes" |
| 1166 | .el .Sh "\f(CWev_child\fP \- watch out for process status changes" |
1222 | .el .Sh "\f(CWev_child\fP \- watch out for process status changes" |
| 1167 | .IX Subsection "ev_child - watch out for process status changes" |
1223 | .IX Subsection "ev_child - watch out for process status changes" |
| 1168 | Child watchers trigger when your process receives a \s-1SIGCHLD\s0 in response to |
1224 | Child watchers trigger when your process receives a \s-1SIGCHLD\s0 in response to |
| 1169 | some child status changes (most typically when a child of yours dies). |
1225 | some child status changes (most typically when a child of yours dies). |
| … | |
… | |
| 1177 | \&\fIany\fR process if \f(CW\*(C`pid\*(C'\fR is specified as \f(CW0\fR). The callback can look |
1233 | \&\fIany\fR process if \f(CW\*(C`pid\*(C'\fR is specified as \f(CW0\fR). The callback can look |
| 1178 | at the \f(CW\*(C`rstatus\*(C'\fR member of the \f(CW\*(C`ev_child\*(C'\fR watcher structure to see |
1234 | at the \f(CW\*(C`rstatus\*(C'\fR member of the \f(CW\*(C`ev_child\*(C'\fR watcher structure to see |
| 1179 | the status word (use the macros from \f(CW\*(C`sys/wait.h\*(C'\fR and see your systems |
1235 | the status word (use the macros from \f(CW\*(C`sys/wait.h\*(C'\fR and see your systems |
| 1180 | \&\f(CW\*(C`waitpid\*(C'\fR documentation). The \f(CW\*(C`rpid\*(C'\fR member contains the pid of the |
1236 | \&\f(CW\*(C`waitpid\*(C'\fR documentation). The \f(CW\*(C`rpid\*(C'\fR member contains the pid of the |
| 1181 | process causing the status change. |
1237 | process causing the status change. |
|
|
1238 | .IP "int pid [read\-only]" 4 |
|
|
1239 | .IX Item "int pid [read-only]" |
|
|
1240 | The process id this watcher watches out for, or \f(CW0\fR, meaning any process id. |
|
|
1241 | .IP "int rpid [read\-write]" 4 |
|
|
1242 | .IX Item "int rpid [read-write]" |
|
|
1243 | The process id that detected a status change. |
|
|
1244 | .IP "int rstatus [read\-write]" 4 |
|
|
1245 | .IX Item "int rstatus [read-write]" |
|
|
1246 | The process exit/trace status caused by \f(CW\*(C`rpid\*(C'\fR (see your systems |
|
|
1247 | \&\f(CW\*(C`waitpid\*(C'\fR and \f(CW\*(C`sys/wait.h\*(C'\fR documentation for details). |
| 1182 | .PP |
1248 | .PP |
| 1183 | Example: try to exit cleanly on \s-1SIGINT\s0 and \s-1SIGTERM\s0. |
1249 | Example: try to exit cleanly on \s-1SIGINT\s0 and \s-1SIGTERM\s0. |
| 1184 | .PP |
1250 | .PP |
| 1185 | .Vb 5 |
1251 | .Vb 5 |
| 1186 | \& static void |
1252 | \& static void |
| … | |
… | |
| 1192 | .PP |
1258 | .PP |
| 1193 | .Vb 3 |
1259 | .Vb 3 |
| 1194 | \& struct ev_signal signal_watcher; |
1260 | \& struct ev_signal signal_watcher; |
| 1195 | \& ev_signal_init (&signal_watcher, sigint_cb, SIGINT); |
1261 | \& ev_signal_init (&signal_watcher, sigint_cb, SIGINT); |
| 1196 | \& ev_signal_start (loop, &sigint_cb); |
1262 | \& ev_signal_start (loop, &sigint_cb); |
|
|
1263 | .Ve |
|
|
1264 | .ie n .Sh """ev_stat"" \- did the file attributes just change?" |
|
|
1265 | .el .Sh "\f(CWev_stat\fP \- did the file attributes just change?" |
|
|
1266 | .IX Subsection "ev_stat - did the file attributes just change?" |
|
|
1267 | This watches a filesystem path for attribute changes. That is, it calls |
|
|
1268 | \&\f(CW\*(C`stat\*(C'\fR regularly (or when the \s-1OS\s0 says it changed) and sees if it changed |
|
|
1269 | compared to the last time, invoking the callback if it did. |
|
|
1270 | .PP |
|
|
1271 | The path does not need to exist: changing from \*(L"path exists\*(R" to \*(L"path does |
|
|
1272 | not exist\*(R" is a status change like any other. The condition \*(L"path does |
|
|
1273 | not exist\*(R" is signified by the \f(CW\*(C`st_nlink\*(C'\fR field being zero (which is |
|
|
1274 | otherwise always forced to be at least one) and all the other fields of |
|
|
1275 | the stat buffer having unspecified contents. |
|
|
1276 | .PP |
|
|
1277 | Since there is no standard to do this, the portable implementation simply |
|
|
1278 | calls \f(CW\*(C`stat (2)\*(C'\fR regulalry on the path to see if it changed somehow. You |
|
|
1279 | can specify a recommended polling interval for this case. If you specify |
|
|
1280 | a polling interval of \f(CW0\fR (highly recommended!) then a \fIsuitable, |
|
|
1281 | unspecified default\fR value will be used (which you can expect to be around |
|
|
1282 | five seconds, although this might change dynamically). Libev will also |
|
|
1283 | impose a minimum interval which is currently around \f(CW0.1\fR, but thats |
|
|
1284 | usually overkill. |
|
|
1285 | .PP |
|
|
1286 | This watcher type is not meant for massive numbers of stat watchers, |
|
|
1287 | as even with OS-supported change notifications, this can be |
|
|
1288 | resource\-intensive. |
|
|
1289 | .PP |
|
|
1290 | At the time of this writing, no specific \s-1OS\s0 backends are implemented, but |
|
|
1291 | if demand increases, at least a kqueue and inotify backend will be added. |
|
|
1292 | .IP "ev_stat_init (ev_stat *, callback, const char *path, ev_tstamp interval)" 4 |
|
|
1293 | .IX Item "ev_stat_init (ev_stat *, callback, const char *path, ev_tstamp interval)" |
|
|
1294 | .PD 0 |
|
|
1295 | .IP "ev_stat_set (ev_stat *, const char *path, ev_tstamp interval)" 4 |
|
|
1296 | .IX Item "ev_stat_set (ev_stat *, const char *path, ev_tstamp interval)" |
|
|
1297 | .PD |
|
|
1298 | Configures the watcher to wait for status changes of the given |
|
|
1299 | \&\f(CW\*(C`path\*(C'\fR. The \f(CW\*(C`interval\*(C'\fR is a hint on how quickly a change is expected to |
|
|
1300 | be detected and should normally be specified as \f(CW0\fR to let libev choose |
|
|
1301 | a suitable value. The memory pointed to by \f(CW\*(C`path\*(C'\fR must point to the same |
|
|
1302 | path for as long as the watcher is active. |
|
|
1303 | .Sp |
|
|
1304 | The callback will be receive \f(CW\*(C`EV_STAT\*(C'\fR when a change was detected, |
|
|
1305 | relative to the attributes at the time the watcher was started (or the |
|
|
1306 | last change was detected). |
|
|
1307 | .IP "ev_stat_stat (ev_stat *)" 4 |
|
|
1308 | .IX Item "ev_stat_stat (ev_stat *)" |
|
|
1309 | Updates the stat buffer immediately with new values. If you change the |
|
|
1310 | watched path in your callback, you could call this fucntion to avoid |
|
|
1311 | detecting this change (while introducing a race condition). Can also be |
|
|
1312 | useful simply to find out the new values. |
|
|
1313 | .IP "ev_statdata attr [read\-only]" 4 |
|
|
1314 | .IX Item "ev_statdata attr [read-only]" |
|
|
1315 | The most-recently detected attributes of the file. Although the type is of |
|
|
1316 | \&\f(CW\*(C`ev_statdata\*(C'\fR, this is usually the (or one of the) \f(CW\*(C`struct stat\*(C'\fR types |
|
|
1317 | suitable for your system. If the \f(CW\*(C`st_nlink\*(C'\fR member is \f(CW0\fR, then there |
|
|
1318 | was some error while \f(CW\*(C`stat\*(C'\fRing the file. |
|
|
1319 | .IP "ev_statdata prev [read\-only]" 4 |
|
|
1320 | .IX Item "ev_statdata prev [read-only]" |
|
|
1321 | The previous attributes of the file. The callback gets invoked whenever |
|
|
1322 | \&\f(CW\*(C`prev\*(C'\fR != \f(CW\*(C`attr\*(C'\fR. |
|
|
1323 | .IP "ev_tstamp interval [read\-only]" 4 |
|
|
1324 | .IX Item "ev_tstamp interval [read-only]" |
|
|
1325 | The specified interval. |
|
|
1326 | .IP "const char *path [read\-only]" 4 |
|
|
1327 | .IX Item "const char *path [read-only]" |
|
|
1328 | The filesystem path that is being watched. |
|
|
1329 | .PP |
|
|
1330 | Example: Watch \f(CW\*(C`/etc/passwd\*(C'\fR for attribute changes. |
|
|
1331 | .PP |
|
|
1332 | .Vb 15 |
|
|
1333 | \& static void |
|
|
1334 | \& passwd_cb (struct ev_loop *loop, ev_stat *w, int revents) |
|
|
1335 | \& { |
|
|
1336 | \& /* /etc/passwd changed in some way */ |
|
|
1337 | \& if (w->attr.st_nlink) |
|
|
1338 | \& { |
|
|
1339 | \& printf ("passwd current size %ld\en", (long)w->attr.st_size); |
|
|
1340 | \& printf ("passwd current atime %ld\en", (long)w->attr.st_mtime); |
|
|
1341 | \& printf ("passwd current mtime %ld\en", (long)w->attr.st_mtime); |
|
|
1342 | \& } |
|
|
1343 | \& else |
|
|
1344 | \& /* you shalt not abuse printf for puts */ |
|
|
1345 | \& puts ("wow, /etc/passwd is not there, expect problems. " |
|
|
1346 | \& "if this is windows, they already arrived\en"); |
|
|
1347 | \& } |
|
|
1348 | .Ve |
|
|
1349 | .PP |
|
|
1350 | .Vb 2 |
|
|
1351 | \& ... |
|
|
1352 | \& ev_stat passwd; |
|
|
1353 | .Ve |
|
|
1354 | .PP |
|
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1355 | .Vb 2 |
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1356 | \& ev_stat_init (&passwd, passwd_cb, "/etc/passwd"); |
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1357 | \& ev_stat_start (loop, &passwd); |
| 1197 | .Ve |
1358 | .Ve |
| 1198 | .ie n .Sh """ev_idle"" \- when you've got nothing better to do..." |
1359 | .ie n .Sh """ev_idle"" \- when you've got nothing better to do..." |
| 1199 | .el .Sh "\f(CWev_idle\fP \- when you've got nothing better to do..." |
1360 | .el .Sh "\f(CWev_idle\fP \- when you've got nothing better to do..." |
| 1200 | .IX Subsection "ev_idle - when you've got nothing better to do..." |
1361 | .IX Subsection "ev_idle - when you've got nothing better to do..." |
| 1201 | Idle watchers trigger events when there are no other events are pending |
1362 | Idle watchers trigger events when there are no other events are pending |
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| 1449 | .IP "ev_embed_sweep (loop, ev_embed *)" 4 |
1610 | .IP "ev_embed_sweep (loop, ev_embed *)" 4 |
| 1450 | .IX Item "ev_embed_sweep (loop, ev_embed *)" |
1611 | .IX Item "ev_embed_sweep (loop, ev_embed *)" |
| 1451 | Make a single, non-blocking sweep over the embedded loop. This works |
1612 | Make a single, non-blocking sweep over the embedded loop. This works |
| 1452 | similarly to \f(CW\*(C`ev_loop (embedded_loop, EVLOOP_NONBLOCK)\*(C'\fR, but in the most |
1613 | similarly to \f(CW\*(C`ev_loop (embedded_loop, EVLOOP_NONBLOCK)\*(C'\fR, but in the most |
| 1453 | apropriate way for embedded loops. |
1614 | apropriate way for embedded loops. |
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1615 | .IP "struct ev_loop *loop [read\-only]" 4 |
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1616 | .IX Item "struct ev_loop *loop [read-only]" |
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1617 | The embedded event loop. |
| 1454 | .SH "OTHER FUNCTIONS" |
1618 | .SH "OTHER FUNCTIONS" |
| 1455 | .IX Header "OTHER FUNCTIONS" |
1619 | .IX Header "OTHER FUNCTIONS" |
| 1456 | There are some other functions of possible interest. Described. Here. Now. |
1620 | There are some other functions of possible interest. Described. Here. Now. |
| 1457 | .IP "ev_once (loop, int fd, int events, ev_tstamp timeout, callback)" 4 |
1621 | .IP "ev_once (loop, int fd, int events, ev_tstamp timeout, callback)" 4 |
| 1458 | .IX Item "ev_once (loop, int fd, int events, ev_tstamp timeout, callback)" |
1622 | .IX Item "ev_once (loop, int fd, int events, ev_tstamp timeout, callback)" |
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| 1839 | If undefined or defined to \f(CW1\fR, then all event-loop-specific functions |
2003 | If undefined or defined to \f(CW1\fR, then all event-loop-specific functions |
| 1840 | will have the \f(CW\*(C`struct ev_loop *\*(C'\fR as first argument, and you can create |
2004 | will have the \f(CW\*(C`struct ev_loop *\*(C'\fR as first argument, and you can create |
| 1841 | additional independent event loops. Otherwise there will be no support |
2005 | additional independent event loops. Otherwise there will be no support |
| 1842 | for multiple event loops and there is no first event loop pointer |
2006 | for multiple event loops and there is no first event loop pointer |
| 1843 | argument. Instead, all functions act on the single default loop. |
2007 | argument. Instead, all functions act on the single default loop. |
| 1844 | .IP "\s-1EV_PERIODICS\s0" 4 |
2008 | .IP "\s-1EV_PERIODIC_ENABLE\s0" 4 |
| 1845 | .IX Item "EV_PERIODICS" |
2009 | .IX Item "EV_PERIODIC_ENABLE" |
| 1846 | If undefined or defined to be \f(CW1\fR, then periodic timers are supported, |
2010 | If undefined or defined to be \f(CW1\fR, then periodic timers are supported. If |
| 1847 | otherwise not. This saves a few kb of code. |
2011 | defined to be \f(CW0\fR, then they are not. Disabling them saves a few kB of |
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2012 | code. |
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2013 | .IP "\s-1EV_EMBED_ENABLE\s0" 4 |
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2014 | .IX Item "EV_EMBED_ENABLE" |
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2015 | If undefined or defined to be \f(CW1\fR, then embed watchers are supported. If |
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2016 | defined to be \f(CW0\fR, then they are not. |
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2017 | .IP "\s-1EV_STAT_ENABLE\s0" 4 |
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2018 | .IX Item "EV_STAT_ENABLE" |
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2019 | If undefined or defined to be \f(CW1\fR, then stat watchers are supported. If |
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2020 | defined to be \f(CW0\fR, then they are not. |
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2021 | .IP "\s-1EV_MINIMAL\s0" 4 |
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2022 | .IX Item "EV_MINIMAL" |
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2023 | If you need to shave off some kilobytes of code at the expense of some |
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2024 | speed, define this symbol to \f(CW1\fR. Currently only used for gcc to override |
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2025 | some inlining decisions, saves roughly 30% codesize of amd64. |
| 1848 | .IP "\s-1EV_COMMON\s0" 4 |
2026 | .IP "\s-1EV_COMMON\s0" 4 |
| 1849 | .IX Item "EV_COMMON" |
2027 | .IX Item "EV_COMMON" |
| 1850 | By default, all watchers have a \f(CW\*(C`void *data\*(C'\fR member. By redefining |
2028 | By default, all watchers have a \f(CW\*(C`void *data\*(C'\fR member. By redefining |
| 1851 | this macro to a something else you can include more and other types of |
2029 | this macro to a something else you can include more and other types of |
| 1852 | members. You have to define it each time you include one of the files, |
2030 | members. You have to define it each time you include one of the files, |
