--- libev/ev.h 2007/10/31 11:52:12 1.8 +++ libev/ev.h 2007/10/31 19:07:43 1.12 @@ -1,3 +1,32 @@ +/* + * Copyright (c) 2007 Marc Alexander Lehmann + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + #ifndef EV_H #define EV_H @@ -12,11 +41,17 @@ #define EV_SIGNAL 0x08 #define EV_IDLE 0x10 #define EV_CHECK 0x20 +#define EV_PREPARE 0x40 +#define EV_CHILD 0x80 +#define EV_ERROR (0xff|0x8000) /* can be used to add custom fields to all watchers */ #ifndef EV_COMMON # define EV_COMMON void *data #endif +#ifndef EV_PROTOTYPES +# define EV_PROTOTYPES 1 +#endif /* * struct member types: @@ -94,17 +129,34 @@ EV_WATCHER (ev_idle); }; -/* invoked for each run of the mainloop, just before the next blocking vall is initiated */ +/* invoked for each run of the mainloop, just before the blocking call */ +/* you can still change events in any way you like */ +struct ev_prepare +{ + EV_WATCHER (ev_prepare); +}; + +/* invoked for each run of the mainloop, just after the blocking call */ struct ev_check { EV_WATCHER (ev_check); }; +/* invoked when sigchld is received and waitpid indicates the givne pid */ +struct ev_child +{ + EV_WATCHER_LIST (ev_child); + + int pid; /* ro */ + int status; /* holds the exit status, use the macros from sys/wait.h */ +}; + #define EVMETHOD_NONE 0 #define EVMETHOD_SELECT 1 #define EVMETHOD_EPOLL 2 -int ev_init (int flags); /* returns ev_method */ +#if EV_PROTOTYPES extern int ev_method; +int ev_init (int flags); /* returns ev_method */ /* these three calls are suitable for plugging into pthread_atfork */ void ev_prefork (void); @@ -113,34 +165,46 @@ extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */ ev_tstamp ev_time (void); +#endif #define EVLOOP_NONBLOCK 1 /* do not block/wait */ #define EVLOOP_ONESHOT 2 /* block *once* only */ +#if EV_PROTOTYPES void ev_loop (int flags); extern int ev_loop_done; /* set to 1 to break out of event loop, set to 2 to break out of all event loops */ +/* convinience function, wait for a single event, without registering an event watcher */ +/* if timeout is < 0, do wait indefinitely */ +void ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); +#endif + /* these may evaluate ev multiple times, and the other arguments at most once */ /* either use evw_init + evXXX_set, or the evXXX_init macro, below, to first initialise a watcher */ -#define evw_init(ev,cb_) do { (ev)->active = 0; (ev)->cb = (cb_); } while (0) +#define evw_init(ev,cb_) do { (ev)->active = 0; (ev)->pending = 0; (ev)->cb = (cb_); } while (0) #define evio_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) #define evtimer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) #define evperiodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) #define evsignal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) -#define evcheck_set(ev) /* nop, yes this is a serious in-joke */ -#define evidle_set(ev) /* nop, yes this is a serious in-joke */ +#define evidle_set(ev) /* nop, yes, this is a serious in-joke */ +#define evprepare_set(ev) /* nop, yes, this is a serious in-joke */ +#define evcheck_set(ev) /* nop, yes, this is a serious in-joke */ +#define evchild_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) #define evio_init(ev,cb,fd,events) do { evw_init ((ev), (cb)); evio_set ((ev),(fd),(events)); } while (0) #define evtimer_init(ev,cb,after,repeat) do { evw_init ((ev), (cb)); evtimer_set ((ev),(after),(repeat)); } while (0) #define evperiodic_init(ev,cb,at,interval) do { evw_init ((ev), (cb)); evperiodic_set ((ev),(at),(interval)); } while (0) #define evsignal_init(ev,cb,signum) do { evw_init ((ev), (cb)); evsignal_set ((ev), (signum)); } while (0) -#define evcheck_init(ev,cb) do { evw_init ((ev), (cb)); evcheck_set ((ev)); } while (0) #define evidle_init(ev,cb) do { evw_init ((ev), (cb)); evidle_set ((ev)); } while (0) +#define evprepare_init(ev,cb) do { evw_init ((ev), (cb)); evprepare_set ((ev)); } while (0) +#define evcheck_init(ev,cb) do { evw_init ((ev), (cb)); evcheck_set ((ev)); } while (0) +#define evchild_init(ev,cb,pid) do { evw_init ((ev), (cb)); evchild_set ((ev),(pid)); } while (0) #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ /* stopping (enabling, adding) a watcher does nothing if it is already running */ /* stopping (disabling, deleting) a watcher does nothing unless its already running */ +#if EV_PROTOTYPES void evio_start (struct ev_io *w); void evio_stop (struct ev_io *w); @@ -157,8 +221,15 @@ void evidle_start (struct ev_idle *w); void evidle_stop (struct ev_idle *w); +void evprepare_start (struct ev_prepare *w); +void evprepare_stop (struct ev_prepare *w); + void evcheck_start (struct ev_check *w); void evcheck_stop (struct ev_check *w); +void evchild_start (struct ev_child *w); +void evchild_stop (struct ev_child *w); +#endif + #endif