| … | |
… | |
| 3998 | protecting the loop data, respectively. |
3998 | protecting the loop data, respectively. |
| 3999 | |
3999 | |
| 4000 | static void |
4000 | static void |
| 4001 | l_release (EV_P) |
4001 | l_release (EV_P) |
| 4002 | { |
4002 | { |
| 4003 | udat *u = ev_userdata (EV_A); |
4003 | userdata *u = ev_userdata (EV_A); |
| 4004 | pthread_mutex_unlock (&u->lock); |
4004 | pthread_mutex_unlock (&u->lock); |
| 4005 | } |
4005 | } |
| 4006 | |
4006 | |
| 4007 | static void |
4007 | static void |
| 4008 | l_acquire (EV_P) |
4008 | l_acquire (EV_P) |
| 4009 | { |
4009 | { |
| 4010 | udat *u = ev_userdata (EV_A); |
4010 | userdata *u = ev_userdata (EV_A); |
| 4011 | pthread_mutex_lock (&u->lock); |
4011 | pthread_mutex_lock (&u->lock); |
| 4012 | } |
4012 | } |
| 4013 | |
4013 | |
| 4014 | The event loop thread first acquires the mutex, and then jumps straight |
4014 | The event loop thread first acquires the mutex, and then jumps straight |
| 4015 | into C<ev_loop>: |
4015 | into C<ev_loop>: |
| … | |
… | |
| 4033 | have been called: |
4033 | have been called: |
| 4034 | |
4034 | |
| 4035 | static void |
4035 | static void |
| 4036 | l_invoke (EV_P) |
4036 | l_invoke (EV_P) |
| 4037 | { |
4037 | { |
| 4038 | udat *u = ev_userdata (EV_A); |
4038 | userdata *u = ev_userdata (EV_A); |
| 4039 | |
4039 | |
| 4040 | wake_up_other_thread_in_some_magic_or_not_so_magic_way (); |
4040 | wake_up_other_thread_in_some_magic_or_not_so_magic_way (); |
| 4041 | |
4041 | |
| 4042 | pthread_cond_wait (&u->invoke_cv, &u->lock); |
4042 | pthread_cond_wait (&u->invoke_cv, &u->lock); |
| 4043 | } |
4043 | } |
| … | |
… | |
| 4047 | thread to continue: |
4047 | thread to continue: |
| 4048 | |
4048 | |
| 4049 | static void |
4049 | static void |
| 4050 | real_invoke_pending (EV_P) |
4050 | real_invoke_pending (EV_P) |
| 4051 | { |
4051 | { |
| 4052 | udat *u = ev_userdata (EV_A); |
4052 | userdata *u = ev_userdata (EV_A); |
| 4053 | |
4053 | |
| 4054 | pthread_mutex_lock (&u->lock); |
4054 | pthread_mutex_lock (&u->lock); |
| 4055 | ev_invoke_pending (EV_A); |
4055 | ev_invoke_pending (EV_A); |
| 4056 | pthread_cond_signal (&u->invoke_cv); |
4056 | pthread_cond_signal (&u->invoke_cv); |
| 4057 | pthread_mutex_unlock (&u->lock); |
4057 | pthread_mutex_unlock (&u->lock); |
| … | |
… | |
| 4059 | |
4059 | |
| 4060 | Whenever you want to start/stop a watcher or do other modifications to an |
4060 | Whenever you want to start/stop a watcher or do other modifications to an |
| 4061 | event loop, you will now have to lock: |
4061 | event loop, you will now have to lock: |
| 4062 | |
4062 | |
| 4063 | ev_timer timeout_watcher; |
4063 | ev_timer timeout_watcher; |
| 4064 | udat *u = ev_userdata (EV_A); |
4064 | userdata *u = ev_userdata (EV_A); |
| 4065 | |
4065 | |
| 4066 | ev_timer_init (&timeout_watcher, timeout_cb, 5.5, 0.); |
4066 | ev_timer_init (&timeout_watcher, timeout_cb, 5.5, 0.); |
| 4067 | |
4067 | |
| 4068 | pthread_mutex_lock (&u->lock); |
4068 | pthread_mutex_lock (&u->lock); |
| 4069 | ev_timer_start (EV_A_ &timeout_watcher); |
4069 | ev_timer_start (EV_A_ &timeout_watcher); |
| … | |
… | |
| 4078 | =head3 COROUTINES |
4078 | =head3 COROUTINES |
| 4079 | |
4079 | |
| 4080 | Libev is very accommodating to coroutines ("cooperative threads"): |
4080 | Libev is very accommodating to coroutines ("cooperative threads"): |
| 4081 | libev fully supports nesting calls to its functions from different |
4081 | libev fully supports nesting calls to its functions from different |
| 4082 | coroutines (e.g. you can call C<ev_loop> on the same loop from two |
4082 | coroutines (e.g. you can call C<ev_loop> on the same loop from two |
| 4083 | different coroutines, and switch freely between both coroutines running the |
4083 | different coroutines, and switch freely between both coroutines running |
| 4084 | loop, as long as you don't confuse yourself). The only exception is that |
4084 | the loop, as long as you don't confuse yourself). The only exception is |
| 4085 | you must not do this from C<ev_periodic> reschedule callbacks. |
4085 | that you must not do this from C<ev_periodic> reschedule callbacks. |
| 4086 | |
4086 | |
| 4087 | Care has been taken to ensure that libev does not keep local state inside |
4087 | Care has been taken to ensure that libev does not keep local state inside |
| 4088 | C<ev_loop>, and other calls do not usually allow for coroutine switches as |
4088 | C<ev_loop>, and other calls do not usually allow for coroutine switches as |
| 4089 | they do not call any callbacks. |
4089 | they do not call any callbacks. |
| 4090 | |
4090 | |
