--- libev/ev.h 2007/11/03 21:58:51 1.27 +++ libev/ev.h 2007/11/09 15:15:21 1.42 @@ -44,10 +44,23 @@ # define EV_MAXPRI +2 #endif -#define EV_P void -#define EV_P_ -#define EV_A -#define EV_A_ +#ifndef EV_MULTIPLICITY +# define EV_MULTIPLICITY 1 +#endif + +/* support multiple event loops? */ +#if EV_MULTIPLICITY +struct ev_loop; +# define EV_P struct ev_loop *loop +# define EV_P_ EV_P, +# define EV_A loop +# define EV_A_ EV_A, +#else +# define EV_P void +# define EV_P_ +# define EV_A +# define EV_A_ +#endif /* eventmask, revents, events... */ #define EV_UNDEF -1 /* guaranteed to be invalid */ @@ -85,9 +98,9 @@ #define EV_WATCHER(type) \ int active; /* private */ \ int pending; /* private */ \ - int priority; /* ro */ \ + int priority; /* private */ \ EV_COMMON; /* rw */ \ - void (*cb)(EV_P_ struct type *, int revents); /* rw */ /* gets invoked with an eventmask */ + void (*cb)(EV_P_ struct type *, int revents) /* private */ /* gets invoked with an eventmask */ #define EV_WATCHER_LIST(type) \ EV_WATCHER (type); \ @@ -128,6 +141,7 @@ EV_WATCHER_TIME (ev_periodic); ev_tstamp interval; /* rw */ + ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */ }; /* invoked when fd is either EV_READable or EV_WRITEable */ @@ -183,6 +197,21 @@ int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ }; +/* the presence of this union forces similar struct layout */ +union ev_any_watcher +{ + struct ev_watcher w; + struct ev_watcher_list wl; + struct ev_io io; + struct ev_timer timer; + struct ev_periodic periodic; + struct ev_signal signal; + struct ev_idle idle; + struct ev_child child; + struct ev_prepare prepare; + struct ev_check check; +}; + #define EVMETHOD_AUTO 0 /* consults environment */ #define EVMETHOD_SELECT 1 #define EVMETHOD_POLL 2 @@ -190,26 +219,60 @@ #define EVMETHOD_KQUEUE 8 #define EVMETHOD_DEVPOLL 16 /* NYI */ #define EVMETHOD_PORT 32 /* NYI */ +#define EVMETHOD_WIN32 64 /* NYI */ #define EVMETHOD_ANY ~0 /* any method, do not consult env */ + #if EV_PROTOTYPES -int ev_method (EV_P); -int ev_init (EV_P_ int methods); /* returns ev_method */ int ev_version_major (void); int ev_version_minor (void); -/* these three calls are suitable for plugging into pthread_atfork */ -void ev_fork_prepare (void); -void ev_fork_parent (void); -void ev_fork_child (void); - ev_tstamp ev_time (void); + +/* Sets the allocation function to use, works like realloc. + * It is used to allocate and free memory. + * If it returns zero when memory needs to be allocated, the library might abort + * or take some potentially destructive action. + * The default is your system realloc function. + */ +void ev_set_allocator (void *(*cb)(void *ptr, long size)); + +/* set the callback function to call on a + * retryable syscall error + * (such as failed select, poll, epoll_wait) + */ +void ev_set_syserr_cb (void (*cb)(const char *msg)); + +# if EV_MULTIPLICITY +/* the default loop is the only one that handles signals and child watchers */ +/* you can call this as often as you like */ +struct ev_loop *ev_default_loop (int methods); /* returns default loop */ + +/* create and destroy alternative loops that don't handle signals */ +struct ev_loop *ev_loop_new (int methods); +void ev_loop_destroy (EV_P); +void ev_loop_fork (EV_P); +# else +int ev_default_loop (int methods); /* returns true when successful */ +# endif + +void ev_default_destroy (void); /* destroy the default loop */ +/* this needs to be called after fork, to duplicate the default loop */ +/* if you create alternative loops you have to call ev_loop_fork on them */ +/* you can call it in either the parent or the child */ +/* you can actually call it at any time, anywhere :) */ +void ev_default_fork (void); + +int ev_method (EV_P); #endif #define EVLOOP_NONBLOCK 1 /* do not block/wait */ #define EVLOOP_ONESHOT 2 /* block *once* only */ +#define EVUNLOOP_ONCE 1 /* unloop once */ +#define EVUNLOOP_ALL 2 /* unloop all loops */ + #if EV_PROTOTYPES void ev_loop (EV_P_ int flags); -void ev_unloop (EV_P_ int status); /* set to 1 to break out of event loop, set to 2 to break out of all event loops */ +void ev_unloop (EV_P_ int how); /* set to 1 to break out of event loop, set to 2 to break out of all event loops */ ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */ @@ -228,11 +291,16 @@ /* these may evaluate ev multiple times, and the other arguments at most once */ /* either use ev_watcher_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ -#define ev_watcher_init(ev,cb_) do { (ev)->active = (ev)->pending = (ev)->priority = 0; (ev)->cb = (cb_); } while (0) +#define ev_watcher_init(ev,cb_) do { \ + ((struct ev_watcher *)(void *)(ev))->active = \ + ((struct ev_watcher *)(void *)(ev))->pending = \ + ((struct ev_watcher *)(void *)(ev))->priority = 0; \ + (ev)->cb = (cb_); \ +} while (0) #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) #define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) -#define ev_periodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) +#define ev_periodic_set(ev,at_,ival_,res_) do { (ev)->at = (at_); (ev)->interval = (ival_); (ev)->reschedule_cb= (res_); } while (0) #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ @@ -241,31 +309,42 @@ #define ev_io_init(ev,cb,fd,events) do { ev_watcher_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) #define ev_timer_init(ev,cb,after,repeat) do { ev_watcher_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) -#define ev_periodic_init(ev,cb,at,interval) do { ev_watcher_init ((ev), (cb)); ev_periodic_set ((ev),(at),(interval)); } while (0) +#define ev_periodic_init(ev,cb,at,ival,res) do { ev_watcher_init ((ev), (cb)); ev_periodic_set ((ev),(at),(ival),(res)); } while (0) #define ev_signal_init(ev,cb,signum) do { ev_watcher_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) #define ev_idle_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) #define ev_prepare_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) #define ev_check_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0) #define ev_child_init(ev,cb,pid) do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0) -#define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ -#define ev_set_priority(ev,pri) (ev)->priority = pri +#define ev_is_pending(ev) (0 + ((struct ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */ +#define ev_is_active(ev) (0 + ((struct ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */ + +#define ev_priority(ev) ((struct ev_watcher *)(void *)(ev))->priority /* rw */ +#define ev_cb(ev) (ev)->cb /* rw */ +#define ev_set_priority(ev,pri) ev_priority (ev) = (pri) +#define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_) /* 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 + +/* feeds an event into a watcher as if the event actually occured */ +/* accepts any ev_watcher type */ +void ev_feed_event (EV_P_ void *w, int revents); +void ev_feed_fd_event (EV_P_ int fd, int revents); +void ev_feed_signal_event (EV_P_ int signum); + void ev_io_start (EV_P_ struct ev_io *w); void ev_io_stop (EV_P_ struct ev_io *w); void ev_timer_start (EV_P_ struct ev_timer *w); void ev_timer_stop (EV_P_ struct ev_timer *w); -void ev_timer_again (EV_P_ struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ +/* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ +void ev_timer_again (EV_P_ struct ev_timer *w); void ev_periodic_start (EV_P_ struct ev_periodic *w); void ev_periodic_stop (EV_P_ struct ev_periodic *w); - -void ev_signal_start (EV_P_ struct ev_signal *w); -void ev_signal_stop (EV_P_ struct ev_signal *w); +void ev_periodic_again (EV_P_ struct ev_periodic *w); void ev_idle_start (EV_P_ struct ev_idle *w); void ev_idle_stop (EV_P_ struct ev_idle *w); @@ -276,6 +355,11 @@ void ev_check_start (EV_P_ struct ev_check *w); void ev_check_stop (EV_P_ struct ev_check *w); +/* only supported in the default loop */ +void ev_signal_start (EV_P_ struct ev_signal *w); +void ev_signal_stop (EV_P_ struct ev_signal *w); + +/* only supported in the default loop */ void ev_child_start (EV_P_ struct ev_child *w); void ev_child_stop (EV_P_ struct ev_child *w); #endif