1 | .\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35) |
1 | .\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.43) |
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3 | .\" Standard preamble: |
4 | .\" ======================================================================== |
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133 | .\" ======================================================================== |
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134 | .\" |
135 | .IX Title "LIBEV 3" |
135 | .IX Title "LIBEV 3" |
136 | .TH LIBEV 3 "2019-12-21" "libev-4.31" "libev - high performance full featured event loop" |
136 | .TH LIBEV 3 "2023-05-15" "libev-4.33" "libev - high performance full featured event loop" |
137 | .\" For nroff, turn off justification. Always turn off hyphenation; it makes |
137 | .\" For nroff, turn off justification. Always turn off hyphenation; it makes |
138 | .\" way too many mistakes in technical documents. |
138 | .\" way too many mistakes in technical documents. |
139 | .if n .ad l |
139 | .if n .ad l |
140 | .nh |
140 | .nh |
141 | .SH "NAME" |
141 | .SH "NAME" |
… | |
… | |
801 | and is not embeddable, which would limit the usefulness of this backend |
801 | and is not embeddable, which would limit the usefulness of this backend |
802 | immensely. |
802 | immensely. |
803 | .ie n .IP """EVBACKEND_PORT"" (value 32, Solaris 10)" 4 |
803 | .ie n .IP """EVBACKEND_PORT"" (value 32, Solaris 10)" 4 |
804 | .el .IP "\f(CWEVBACKEND_PORT\fR (value 32, Solaris 10)" 4 |
804 | .el .IP "\f(CWEVBACKEND_PORT\fR (value 32, Solaris 10)" 4 |
805 | .IX Item "EVBACKEND_PORT (value 32, Solaris 10)" |
805 | .IX Item "EVBACKEND_PORT (value 32, Solaris 10)" |
806 | This uses the Solaris 10 event port mechanism. As with everything on Solaris, |
806 | This uses the Solaris 10 event port mechanism. As with everything on |
807 | it's really slow, but it still scales very well (O(active_fds)). |
807 | Solaris, it's really slow, but it still scales very well (O(active_fds)). |
808 | .Sp |
808 | .Sp |
809 | While this backend scales well, it requires one system call per active |
809 | While this backend scales well, it requires one system call per active |
810 | file descriptor per loop iteration. For small and medium numbers of file |
810 | file descriptor per loop iteration. For small and medium numbers of file |
811 | descriptors a \*(L"slow\*(R" \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR or \f(CW\*(C`EVBACKEND_POLL\*(C'\fR backend |
811 | descriptors a \*(L"slow\*(R" \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR or \f(CW\*(C`EVBACKEND_POLL\*(C'\fR backend |
812 | might perform better. |
812 | might perform better. |
… | |
… | |
1087 | \& \- Queue all expired timers. |
1087 | \& \- Queue all expired timers. |
1088 | \& \- Queue all expired periodics. |
1088 | \& \- Queue all expired periodics. |
1089 | \& \- Queue all idle watchers with priority higher than that of pending events. |
1089 | \& \- Queue all idle watchers with priority higher than that of pending events. |
1090 | \& \- Queue all check watchers. |
1090 | \& \- Queue all check watchers. |
1091 | \& \- Call all queued watchers in reverse order (i.e. check watchers first). |
1091 | \& \- Call all queued watchers in reverse order (i.e. check watchers first). |
1092 | \& Signals and child watchers are implemented as I/O watchers, and will |
1092 | \& Signals, async and child watchers are implemented as I/O watchers, and |
1093 | \& be handled here by queueing them when their watcher gets executed. |
1093 | \& will be handled here by queueing them when their watcher gets executed. |
1094 | \& \- If ev_break has been called, or EVRUN_ONCE or EVRUN_NOWAIT |
1094 | \& \- If ev_break has been called, or EVRUN_ONCE or EVRUN_NOWAIT |
1095 | \& were used, or there are no active watchers, goto FINISH, otherwise |
1095 | \& were used, or there are no active watchers, goto FINISH, otherwise |
1096 | \& continue with step LOOP. |
1096 | \& continue with step LOOP. |
1097 | \& FINISH: |
1097 | \& FINISH: |
1098 | \& \- Reset the ev_break status iff it was EVBREAK_ONE. |
1098 | \& \- Reset the ev_break status iff it was EVBREAK_ONE. |
… | |
… | |
1349 | with a watcher-specific start function (\f(CW\*(C`ev_TYPE_start (loop, watcher |
1349 | with a watcher-specific start function (\f(CW\*(C`ev_TYPE_start (loop, watcher |
1350 | *)\*(C'\fR), and you can stop watching for events at any time by calling the |
1350 | *)\*(C'\fR), and you can stop watching for events at any time by calling the |
1351 | corresponding stop function (\f(CW\*(C`ev_TYPE_stop (loop, watcher *)\*(C'\fR. |
1351 | corresponding stop function (\f(CW\*(C`ev_TYPE_stop (loop, watcher *)\*(C'\fR. |
1352 | .PP |
1352 | .PP |
1353 | As long as your watcher is active (has been started but not stopped) you |
1353 | As long as your watcher is active (has been started but not stopped) you |
1354 | must not touch the values stored in it. Most specifically you must never |
1354 | must not touch the values stored in it except when explicitly documented |
1355 | reinitialise it or call its \f(CW\*(C`ev_TYPE_set\*(C'\fR macro. |
1355 | otherwise. Most specifically you must never reinitialise it or call its |
|
|
1356 | \&\f(CW\*(C`ev_TYPE_set\*(C'\fR macro. |
1356 | .PP |
1357 | .PP |
1357 | Each and every callback receives the event loop pointer as first, the |
1358 | Each and every callback receives the event loop pointer as first, the |
1358 | registered watcher structure as second, and a bitset of received events as |
1359 | registered watcher structure as second, and a bitset of received events as |
1359 | third argument. |
1360 | third argument. |
1360 | .PP |
1361 | .PP |
… | |
… | |
1531 | therefore a good idea to always call its \f(CW\*(C`ev_TYPE_stop\*(C'\fR function. |
1532 | therefore a good idea to always call its \f(CW\*(C`ev_TYPE_stop\*(C'\fR function. |
1532 | .IP "bool ev_is_active (ev_TYPE *watcher)" 4 |
1533 | .IP "bool ev_is_active (ev_TYPE *watcher)" 4 |
1533 | .IX Item "bool ev_is_active (ev_TYPE *watcher)" |
1534 | .IX Item "bool ev_is_active (ev_TYPE *watcher)" |
1534 | Returns a true value iff the watcher is active (i.e. it has been started |
1535 | Returns a true value iff the watcher is active (i.e. it has been started |
1535 | and not yet been stopped). As long as a watcher is active you must not modify |
1536 | and not yet been stopped). As long as a watcher is active you must not modify |
1536 | it. |
1537 | it unless documented otherwise. |
|
|
1538 | .Sp |
|
|
1539 | Obviously, it is safe to call this on an active watcher, or actually any |
|
|
1540 | watcher that is initialised. |
1537 | .IP "bool ev_is_pending (ev_TYPE *watcher)" 4 |
1541 | .IP "bool ev_is_pending (ev_TYPE *watcher)" 4 |
1538 | .IX Item "bool ev_is_pending (ev_TYPE *watcher)" |
1542 | .IX Item "bool ev_is_pending (ev_TYPE *watcher)" |
1539 | Returns a true value iff the watcher is pending, (i.e. it has outstanding |
1543 | Returns a true value iff the watcher is pending, (i.e. it has outstanding |
1540 | events but its callback has not yet been invoked). As long as a watcher |
1544 | events but its callback has not yet been invoked). As long as a watcher |
1541 | is pending (but not active) you must not call an init function on it (but |
1545 | is pending (but not active) you must not call an init function on it (but |
1542 | \&\f(CW\*(C`ev_TYPE_set\*(C'\fR is safe), you must not change its priority, and you must |
1546 | \&\f(CW\*(C`ev_TYPE_set\*(C'\fR is safe), you must not change its priority, and you must |
1543 | make sure the watcher is available to libev (e.g. you cannot \f(CW\*(C`free ()\*(C'\fR |
1547 | make sure the watcher is available to libev (e.g. you cannot \f(CW\*(C`free ()\*(C'\fR |
1544 | it). |
1548 | it). |
|
|
1549 | .Sp |
|
|
1550 | It is safe to call this on any watcher in any state as long as it is |
|
|
1551 | initialised. |
1545 | .IP "callback ev_cb (ev_TYPE *watcher)" 4 |
1552 | .IP "callback ev_cb (ev_TYPE *watcher)" 4 |
1546 | .IX Item "callback ev_cb (ev_TYPE *watcher)" |
1553 | .IX Item "callback ev_cb (ev_TYPE *watcher)" |
1547 | Returns the callback currently set on the watcher. |
1554 | Returns the callback currently set on the watcher. |
1548 | .IP "ev_set_cb (ev_TYPE *watcher, callback)" 4 |
1555 | .IP "ev_set_cb (ev_TYPE *watcher, callback)" 4 |
1549 | .IX Item "ev_set_cb (ev_TYPE *watcher, callback)" |
1556 | .IX Item "ev_set_cb (ev_TYPE *watcher, callback)" |
… | |
… | |
1562 | from being executed (except for \f(CW\*(C`ev_idle\*(C'\fR watchers). |
1569 | from being executed (except for \f(CW\*(C`ev_idle\*(C'\fR watchers). |
1563 | .Sp |
1570 | .Sp |
1564 | If you need to suppress invocation when higher priority events are pending |
1571 | If you need to suppress invocation when higher priority events are pending |
1565 | you need to look at \f(CW\*(C`ev_idle\*(C'\fR watchers, which provide this functionality. |
1572 | you need to look at \f(CW\*(C`ev_idle\*(C'\fR watchers, which provide this functionality. |
1566 | .Sp |
1573 | .Sp |
1567 | You \fImust not\fR change the priority of a watcher as long as it is active or |
1574 | You \fImust not\fR change the priority of a watcher as long as it is active |
1568 | pending. |
1575 | or pending. Reading the priority with \f(CW\*(C`ev_priority\*(C'\fR is fine in any state. |
1569 | .Sp |
1576 | .Sp |
1570 | Setting a priority outside the range of \f(CW\*(C`EV_MINPRI\*(C'\fR to \f(CW\*(C`EV_MAXPRI\*(C'\fR is |
1577 | Setting a priority outside the range of \f(CW\*(C`EV_MINPRI\*(C'\fR to \f(CW\*(C`EV_MAXPRI\*(C'\fR is |
1571 | fine, as long as you do not mind that the priority value you query might |
1578 | fine, as long as you do not mind that the priority value you query might |
1572 | or might not have been clamped to the valid range. |
1579 | or might not have been clamped to the valid range. |
1573 | .Sp |
1580 | .Sp |
… | |
… | |
1592 | callback to be invoked, which can be accomplished with this function. |
1599 | callback to be invoked, which can be accomplished with this function. |
1593 | .IP "ev_feed_event (loop, ev_TYPE *watcher, int revents)" 4 |
1600 | .IP "ev_feed_event (loop, ev_TYPE *watcher, int revents)" 4 |
1594 | .IX Item "ev_feed_event (loop, ev_TYPE *watcher, int revents)" |
1601 | .IX Item "ev_feed_event (loop, ev_TYPE *watcher, int revents)" |
1595 | Feeds the given event set into the event loop, as if the specified event |
1602 | Feeds the given event set into the event loop, as if the specified event |
1596 | had happened for the specified watcher (which must be a pointer to an |
1603 | had happened for the specified watcher (which must be a pointer to an |
1597 | initialised but not necessarily started event watcher). Obviously you must |
1604 | initialised but not necessarily started event watcher, though it can be |
1598 | not free the watcher as long as it has pending events. |
1605 | active). Obviously you must not free the watcher as long as it has pending |
|
|
1606 | events. |
1599 | .Sp |
1607 | .Sp |
1600 | Stopping the watcher, letting libev invoke it, or calling |
1608 | Stopping the watcher, letting libev invoke it, or calling |
1601 | \&\f(CW\*(C`ev_clear_pending\*(C'\fR will clear the pending event, even if the watcher was |
1609 | \&\f(CW\*(C`ev_clear_pending\*(C'\fR will clear the pending event, even if the watcher was |
1602 | not started in the first place. |
1610 | not started in the first place. |
1603 | .Sp |
1611 | .Sp |
… | |
… | |
1624 | \&\f(CW\*(C`ev_TYPE_init\*(C'\fR again. |
1632 | \&\f(CW\*(C`ev_TYPE_init\*(C'\fR again. |
1625 | .IP "started/running/active" 4 |
1633 | .IP "started/running/active" 4 |
1626 | .IX Item "started/running/active" |
1634 | .IX Item "started/running/active" |
1627 | Once a watcher has been started with a call to \f(CW\*(C`ev_TYPE_start\*(C'\fR it becomes |
1635 | Once a watcher has been started with a call to \f(CW\*(C`ev_TYPE_start\*(C'\fR it becomes |
1628 | property of the event loop, and is actively waiting for events. While in |
1636 | property of the event loop, and is actively waiting for events. While in |
1629 | this state it cannot be accessed (except in a few documented ways), moved, |
1637 | this state it cannot be accessed (except in a few documented ways, such as |
1630 | freed or anything else \- the only legal thing is to keep a pointer to it, |
1638 | stoping it), moved, freed or anything else \- the only legal thing is to |
1631 | and call libev functions on it that are documented to work on active watchers. |
1639 | keep a pointer to it, and call libev functions on it that are documented |
|
|
1640 | to work on active watchers. |
|
|
1641 | .Sp |
|
|
1642 | As a rule of thumb, before accessing a member or calling any function on |
|
|
1643 | a watcher, it should be stopped (or freshly initialised). If that is not |
|
|
1644 | convenient, you can check the documentation for that function or member to |
|
|
1645 | see if it is safe to use on an active watcher. |
1632 | .IP "pending" 4 |
1646 | .IP "pending" 4 |
1633 | .IX Item "pending" |
1647 | .IX Item "pending" |
1634 | If a watcher is active and libev determines that an event it is interested |
1648 | If a watcher is active and libev determines that an event it is interested |
1635 | in has occurred (such as a timer expiring), it will become pending. It will |
1649 | in has occurred (such as a timer expiring), it will become pending. It |
1636 | stay in this pending state until either it is stopped or its callback is |
1650 | will stay in this pending state until either it is explicitly stopped or |
1637 | about to be invoked, so it is not normally pending inside the watcher |
1651 | its callback is about to be invoked, so it is not normally pending inside |
1638 | callback. |
1652 | the watcher callback. |
1639 | .Sp |
1653 | .Sp |
1640 | The watcher might or might not be active while it is pending (for example, |
1654 | Generally, the watcher might or might not be active while it is pending |
1641 | an expired non-repeating timer can be pending but no longer active). If it |
1655 | (for example, an expired non-repeating timer can be pending but no longer |
1642 | is stopped, it can be freely accessed (e.g. by calling \f(CW\*(C`ev_TYPE_set\*(C'\fR), |
1656 | active). If it is pending but not active, it can be freely accessed (e.g. |
1643 | but it is still property of the event loop at this time, so cannot be |
1657 | by calling \f(CW\*(C`ev_TYPE_set\*(C'\fR), but it is still property of the event loop at |
1644 | moved, freed or reused. And if it is active the rules described in the |
1658 | this time, so cannot be moved, freed or reused. And if it is active the |
1645 | previous item still apply. |
1659 | rules described in the previous item still apply. |
|
|
1660 | .Sp |
|
|
1661 | Explicitly stopping a watcher will also clear the pending state |
|
|
1662 | unconditionally, so it is safe to stop a watcher and then free it. |
1646 | .Sp |
1663 | .Sp |
1647 | It is also possible to feed an event on a watcher that is not active (e.g. |
1664 | It is also possible to feed an event on a watcher that is not active (e.g. |
1648 | via \f(CW\*(C`ev_feed_event\*(C'\fR), in which case it becomes pending without being |
1665 | via \f(CW\*(C`ev_feed_event\*(C'\fR), in which case it becomes pending without being |
1649 | active. |
1666 | active. |
1650 | .IP "stopped" 4 |
1667 | .IP "stopped" 4 |
… | |
… | |
1767 | .IX Header "WATCHER TYPES" |
1784 | .IX Header "WATCHER TYPES" |
1768 | This section describes each watcher in detail, but will not repeat |
1785 | This section describes each watcher in detail, but will not repeat |
1769 | information given in the last section. Any initialisation/set macros, |
1786 | information given in the last section. Any initialisation/set macros, |
1770 | functions and members specific to the watcher type are explained. |
1787 | functions and members specific to the watcher type are explained. |
1771 | .PP |
1788 | .PP |
1772 | Members are additionally marked with either \fI[read\-only]\fR, meaning that, |
1789 | Most members are additionally marked with either \fI[read\-only]\fR, meaning |
1773 | while the watcher is active, you can look at the member and expect some |
1790 | that, while the watcher is active, you can look at the member and expect |
1774 | sensible content, but you must not modify it (you can modify it while the |
1791 | some sensible content, but you must not modify it (you can modify it while |
1775 | watcher is stopped to your hearts content), or \fI[read\-write]\fR, which |
1792 | the watcher is stopped to your hearts content), or \fI[read\-write]\fR, which |
1776 | means you can expect it to have some sensible content while the watcher |
1793 | means you can expect it to have some sensible content while the watcher is |
1777 | is active, but you can also modify it. Modifying it may not do something |
1794 | active, but you can also modify it (within the same thread as the event |
|
|
1795 | loop, i.e. without creating data races). Modifying it may not do something |
1778 | sensible or take immediate effect (or do anything at all), but libev will |
1796 | sensible or take immediate effect (or do anything at all), but libev will |
1779 | not crash or malfunction in any way. |
1797 | not crash or malfunction in any way. |
|
|
1798 | .PP |
|
|
1799 | In any case, the documentation for each member will explain what the |
|
|
1800 | effects are, and if there are any additional access restrictions. |
1780 | .ie n .SS """ev_io"" \- is this file descriptor readable or writable?" |
1801 | .ie n .SS """ev_io"" \- is this file descriptor readable or writable?" |
1781 | .el .SS "\f(CWev_io\fP \- is this file descriptor readable or writable?" |
1802 | .el .SS "\f(CWev_io\fP \- is this file descriptor readable or writable?" |
1782 | .IX Subsection "ev_io - is this file descriptor readable or writable?" |
1803 | .IX Subsection "ev_io - is this file descriptor readable or writable?" |
1783 | I/O watchers check whether a file descriptor is readable or writable |
1804 | I/O watchers check whether a file descriptor is readable or writable |
1784 | in each iteration of the event loop, or, more precisely, when reading |
1805 | in each iteration of the event loop, or, more precisely, when reading |
… | |
… | |
1950 | .PD 0 |
1971 | .PD 0 |
1951 | .IP "ev_io_set (ev_io *, int fd, int events)" 4 |
1972 | .IP "ev_io_set (ev_io *, int fd, int events)" 4 |
1952 | .IX Item "ev_io_set (ev_io *, int fd, int events)" |
1973 | .IX Item "ev_io_set (ev_io *, int fd, int events)" |
1953 | .PD |
1974 | .PD |
1954 | Configures an \f(CW\*(C`ev_io\*(C'\fR watcher. The \f(CW\*(C`fd\*(C'\fR is the file descriptor to |
1975 | Configures an \f(CW\*(C`ev_io\*(C'\fR watcher. The \f(CW\*(C`fd\*(C'\fR is the file descriptor to |
1955 | receive events for and \f(CW\*(C`events\*(C'\fR is either \f(CW\*(C`EV_READ\*(C'\fR, \f(CW\*(C`EV_WRITE\*(C'\fR or |
1976 | receive events for and \f(CW\*(C`events\*(C'\fR is either \f(CW\*(C`EV_READ\*(C'\fR, \f(CW\*(C`EV_WRITE\*(C'\fR, both |
1956 | \&\f(CW\*(C`EV_READ | EV_WRITE\*(C'\fR, to express the desire to receive the given events. |
1977 | \&\f(CW\*(C`EV_READ | EV_WRITE\*(C'\fR or \f(CW0\fR, to express the desire to receive the given |
|
|
1978 | events. |
|
|
1979 | .Sp |
|
|
1980 | Note that setting the \f(CW\*(C`events\*(C'\fR to \f(CW0\fR and starting the watcher is |
|
|
1981 | supported, but not specially optimized \- if your program sometimes happens |
|
|
1982 | to generate this combination this is fine, but if it is easy to avoid |
|
|
1983 | starting an io watcher watching for no events you should do so. |
|
|
1984 | .IP "ev_io_modify (ev_io *, int events)" 4 |
|
|
1985 | .IX Item "ev_io_modify (ev_io *, int events)" |
|
|
1986 | Similar to \f(CW\*(C`ev_io_set\*(C'\fR, but only changes the requested events. Using this |
|
|
1987 | might be faster with some backends, as libev can assume that the \f(CW\*(C`fd\*(C'\fR |
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|
1988 | still refers to the same underlying file description, something it cannot |
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|
1989 | do when using \f(CW\*(C`ev_io_set\*(C'\fR. |
1957 | .IP "int fd [read\-only]" 4 |
1990 | .IP "int fd [no\-modify]" 4 |
1958 | .IX Item "int fd [read-only]" |
1991 | .IX Item "int fd [no-modify]" |
1959 | The file descriptor being watched. |
1992 | The file descriptor being watched. While it can be read at any time, you |
|
|
1993 | must not modify this member even when the watcher is stopped \- always use |
|
|
1994 | \&\f(CW\*(C`ev_io_set\*(C'\fR for that. |
1960 | .IP "int events [read\-only]" 4 |
1995 | .IP "int events [no\-modify]" 4 |
1961 | .IX Item "int events [read-only]" |
1996 | .IX Item "int events [no-modify]" |
1962 | The events being watched. |
1997 | The set of events the fd is being watched for, among other flags. Remember |
|
|
1998 | that this is a bit set \- to test for \f(CW\*(C`EV_READ\*(C'\fR, use \f(CW\*(C`w\->events & |
|
|
1999 | EV_READ\*(C'\fR, and similarly for \f(CW\*(C`EV_WRITE\*(C'\fR. |
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|
2000 | .Sp |
|
|
2001 | As with \f(CW\*(C`fd\*(C'\fR, you must not modify this member even when the watcher is |
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|
2002 | stopped, always use \f(CW\*(C`ev_io_set\*(C'\fR or \f(CW\*(C`ev_io_modify\*(C'\fR for that. |
1963 | .PP |
2003 | .PP |
1964 | \fIExamples\fR |
2004 | \fIExamples\fR |
1965 | .IX Subsection "Examples" |
2005 | .IX Subsection "Examples" |
1966 | .PP |
2006 | .PP |
1967 | Example: Call \f(CW\*(C`stdin_readable_cb\*(C'\fR when \s-1STDIN_FILENO\s0 has become, well |
2007 | Example: Call \f(CW\*(C`stdin_readable_cb\*(C'\fR when \s-1STDIN_FILENO\s0 has become, well |
… | |
… | |
3978 | .PP |
4018 | .PP |
3979 | First, you need to associate some data with the event loop: |
4019 | First, you need to associate some data with the event loop: |
3980 | .PP |
4020 | .PP |
3981 | .Vb 6 |
4021 | .Vb 6 |
3982 | \& typedef struct { |
4022 | \& typedef struct { |
3983 | \& mutex_t lock; /* global loop lock */ |
4023 | \& pthread_mutex_t lock; /* global loop lock */ |
|
|
4024 | \& pthread_t tid; |
|
|
4025 | \& pthread_cond_t invoke_cv; |
3984 | \& ev_async async_w; |
4026 | \& ev_async async_w; |
3985 | \& thread_t tid; |
|
|
3986 | \& cond_t invoke_cv; |
|
|
3987 | \& } userdata; |
4027 | \& } userdata; |
3988 | \& |
4028 | \& |
3989 | \& void prepare_loop (EV_P) |
4029 | \& void prepare_loop (EV_P) |
3990 | \& { |
4030 | \& { |
3991 | \& // for simplicity, we use a static userdata struct. |
4031 | \& // for simplicity, we use a static userdata struct. |
3992 | \& static userdata u; |
4032 | \& static userdata u; |
3993 | \& |
4033 | \& |
3994 | \& ev_async_init (&u\->async_w, async_cb); |
4034 | \& ev_async_init (&u.async_w, async_cb); |
3995 | \& ev_async_start (EV_A_ &u\->async_w); |
4035 | \& ev_async_start (EV_A_ &u.async_w); |
3996 | \& |
4036 | \& |
3997 | \& pthread_mutex_init (&u\->lock, 0); |
4037 | \& pthread_mutex_init (&u.lock, 0); |
3998 | \& pthread_cond_init (&u\->invoke_cv, 0); |
4038 | \& pthread_cond_init (&u.invoke_cv, 0); |
3999 | \& |
4039 | \& |
4000 | \& // now associate this with the loop |
4040 | \& // now associate this with the loop |
4001 | \& ev_set_userdata (EV_A_ u); |
4041 | \& ev_set_userdata (EV_A_ &u); |
4002 | \& ev_set_invoke_pending_cb (EV_A_ l_invoke); |
4042 | \& ev_set_invoke_pending_cb (EV_A_ l_invoke); |
4003 | \& ev_set_loop_release_cb (EV_A_ l_release, l_acquire); |
4043 | \& ev_set_loop_release_cb (EV_A_ l_release, l_acquire); |
4004 | \& |
4044 | \& |
4005 | \& // then create the thread running ev_run |
4045 | \& // then create the thread running ev_run |
4006 | \& pthread_create (&u\->tid, 0, l_run, EV_A); |
4046 | \& pthread_create (&u.tid, 0, l_run, EV_A); |
4007 | \& } |
4047 | \& } |
4008 | .Ve |
4048 | .Ve |
4009 | .PP |
4049 | .PP |
4010 | The callback for the \f(CW\*(C`ev_async\*(C'\fR watcher does nothing: the watcher is used |
4050 | The callback for the \f(CW\*(C`ev_async\*(C'\fR watcher does nothing: the watcher is used |
4011 | solely to wake up the event loop so it takes notice of any new watchers |
4051 | solely to wake up the event loop so it takes notice of any new watchers |
… | |
… | |
4395 | gets automatically stopped and restarted when reconfiguring it with this |
4435 | gets automatically stopped and restarted when reconfiguring it with this |
4396 | method. |
4436 | method. |
4397 | .Sp |
4437 | .Sp |
4398 | For \f(CW\*(C`ev::embed\*(C'\fR watchers this method is called \f(CW\*(C`set_embed\*(C'\fR, to avoid |
4438 | For \f(CW\*(C`ev::embed\*(C'\fR watchers this method is called \f(CW\*(C`set_embed\*(C'\fR, to avoid |
4399 | clashing with the \f(CW\*(C`set (loop)\*(C'\fR method. |
4439 | clashing with the \f(CW\*(C`set (loop)\*(C'\fR method. |
|
|
4440 | .Sp |
|
|
4441 | For \f(CW\*(C`ev::io\*(C'\fR watchers there is an additional \f(CW\*(C`set\*(C'\fR method that acepts a |
|
|
4442 | new event mask only, and internally calls \f(CW\*(C`ev_io_modify\*(C'\fR. |
4400 | .IP "w\->start ()" 4 |
4443 | .IP "w\->start ()" 4 |
4401 | .IX Item "w->start ()" |
4444 | .IX Item "w->start ()" |
4402 | Starts the watcher. Note that there is no \f(CW\*(C`loop\*(C'\fR argument, as the |
4445 | Starts the watcher. Note that there is no \f(CW\*(C`loop\*(C'\fR argument, as the |
4403 | constructor already stores the event loop. |
4446 | constructor already stores the event loop. |
4404 | .IP "w\->start ([arguments])" 4 |
4447 | .IP "w\->start ([arguments])" 4 |