--- libev/ev.h 2007/11/02 22:03:00 1.23 +++ libev/ev.h 2007/11/04 23:29:48 1.34 @@ -44,6 +44,24 @@ # define EV_MAXPRI +2 #endif +#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 */ #define EV_NONE 0x00 @@ -80,13 +98,13 @@ #define EV_WATCHER(type) \ int active; /* private */ \ int pending; /* private */ \ - int priority; /* ro */ \ + int priority; /* private */ \ EV_COMMON; /* rw */ \ - void (*cb)(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); \ - struct type *next /* private */ + struct ev_watcher_list *next /* private */ #define EV_WATCHER_TIME(type) \ EV_WATCHER (type); \ @@ -140,6 +158,9 @@ struct ev_signal { EV_WATCHER_LIST (ev_signal); +#if EV_MULTIPLICITY + struct ev_loop *loop; +#endif int signum; /* ro */ }; @@ -168,12 +189,14 @@ /* invoked when sigchld is received and waitpid indicates the givne pid */ /* revent EV_CHILD */ +/* does not support priorities */ struct ev_child { EV_WATCHER_LIST (ev_child); - int pid; /* ro */ - int status; /* rw, holds the exit status, use the macros from sys/wait.h */ + int pid; /* ro */ + int rpid; /* rw, holds the received pid */ + int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ }; #define EVMETHOD_AUTO 0 /* consults environment */ @@ -183,36 +206,70 @@ #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 -extern int ev_method; -int ev_init (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); - -extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */ ev_tstamp ev_time (void); + +# 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 (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 */ +void ev_loop (EV_P_ int flags); +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 */ + +/* + * ref/unref can be used to add or remove a refcount on the mainloop. every watcher + * keeps one reference. if you have a long-runing watcher you never unregister that + * should not keep ev_loop from running, unref() after starting, and ref() before stopping. + */ +void ev_ref (EV_P); +void ev_unref (EV_P); /* 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); +void ev_once (EV_P_ 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 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) @@ -232,36 +289,44 @@ #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 -void ev_io_start (struct ev_io *w); -void ev_io_stop (struct ev_io *w); +void ev_io_start (EV_P_ struct ev_io *w); +void ev_io_stop (EV_P_ struct ev_io *w); -void ev_timer_start (struct ev_timer *w); -void ev_timer_stop (struct ev_timer *w); -void ev_timer_again (struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ +void ev_timer_start (EV_P_ struct ev_timer *w); +void ev_timer_stop (EV_P_ struct ev_timer *w); +/* 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 (struct ev_periodic *w); -void ev_periodic_stop (struct ev_periodic *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 (struct ev_signal *w); -void ev_signal_stop (struct ev_signal *w); +void ev_idle_start (EV_P_ struct ev_idle *w); +void ev_idle_stop (EV_P_ struct ev_idle *w); -void ev_idle_start (struct ev_idle *w); -void ev_idle_stop (struct ev_idle *w); +void ev_prepare_start (EV_P_ struct ev_prepare *w); +void ev_prepare_stop (EV_P_ struct ev_prepare *w); -void ev_prepare_start (struct ev_prepare *w); -void ev_prepare_stop (struct ev_prepare *w); +void ev_check_start (EV_P_ struct ev_check *w); +void ev_check_stop (EV_P_ struct ev_check *w); -void ev_check_start (struct ev_check *w); -void ev_check_stop (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); -void ev_child_start (struct ev_child *w); -void ev_child_stop (struct ev_child *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 #ifdef __cplusplus