X-Git-Url: https://git.llucax.com/software/libev.git/blobdiff_plain/6e0418ec92a0b2bfbbe75790bb015bcd022f5dad..b7e58d7ed7f85d7cb7fe1c34cfe3fa2484a6dc31:/ev.h diff --git a/ev.h b/ev.h index 739402e..9fcae61 100644 --- a/ev.h +++ b/ev.h @@ -48,8 +48,22 @@ typedef double ev_tstamp; # define EV_MULTIPLICITY 1 #endif -#ifndef EV_PERIODICS -# define EV_PERIODICS 1 +#ifndef EV_PERIODIC_ENABLE +# define EV_PERIODIC_ENABLE 1 +#endif + +#ifndef EV_STAT_ENABLE +# define EV_STAT_ENABLE 1 +#endif + +#ifndef EV_EMBED_ENABLE +# define EV_EMBED_ENABLE 1 +#endif + +/*****************************************************************************/ + +#if EV_STAT_ENABLE +# include #endif /* support multiple event loops? */ @@ -68,22 +82,25 @@ struct ev_loop; # define EV_A_ # define EV_DEFAULT_A # define EV_DEFAULT_A_ + +# undef EV_EMBED_ENABLE #endif /* eventmask, revents, events... */ -#define EV_UNDEF -1L /* guaranteed to be invalid */ -#define EV_NONE 0x00L -#define EV_READ 0x01L /* io only */ -#define EV_WRITE 0x02L /* io only */ -#define EV_TIMEOUT 0x000100L /* timer only */ -#define EV_PERIODIC 0x000200L /* periodic timer only */ -#define EV_SIGNAL 0x000400L /* signal only */ -#define EV_IDLE 0x000800L /* idle only */ -#define EV_CHECK 0x001000L /* check only */ -#define EV_PREPARE 0x002000L /* prepare only */ -#define EV_CHILD 0x004000L /* child/pid only */ -#define EV_EMBED 0x008000L /* embedded event loop */ -#define EV_ERROR 0x800000L /* sent when an error occurs */ +#define EV_UNDEF -1L /* guaranteed to be invalid */ +#define EV_NONE 0x00L /* no events */ +#define EV_READ 0x01L /* ev_io detected read will not block */ +#define EV_WRITE 0x02L /* ev_io detected write will not block */ +#define EV_TIMEOUT 0x00000100L /* timer timed out */ +#define EV_PERIODIC 0x00000200L /* periodic timer timed out */ +#define EV_SIGNAL 0x00000400L /* signal was received */ +#define EV_IDLE 0x00000800L /* event loop is idling */ +#define EV_PREPARE 0x00001000L /* event loop about to poll */ +#define EV_CHECK 0x00002000L /* event loop finished poll */ +#define EV_CHILD 0x00004000L /* child/pid had status change */ +#define EV_EMBED 0x00008000L /* embedded event loop needs sweep */ +#define EV_STAT 0x00010000L /* stat data changed */ +#define EV_ERROR 0x80000000L /* sent when an error occurs */ /* can be used to add custom fields to all watchers, while losing binary compatibility */ #ifndef EV_COMMON @@ -127,105 +144,123 @@ struct ev_loop; ev_tstamp at; /* private */ /* base class, nothing to see here unless you subclass */ -struct ev_watcher +typedef struct ev_watcher { EV_WATCHER (ev_watcher) -}; +} ev_watcher; /* base class, nothing to see here unless you subclass */ -struct ev_watcher_list +typedef struct ev_watcher_list { EV_WATCHER_LIST (ev_watcher_list) -}; +} ev_watcher_list; /* base class, nothing to see here unless you subclass */ -struct ev_watcher_time +typedef struct ev_watcher_time { EV_WATCHER_TIME (ev_watcher_time) -}; +} ev_watcher_time; /* invoked after a specific time, repeatable (based on monotonic clock) */ /* revent EV_TIMEOUT */ -struct ev_timer +typedef struct ev_timer { EV_WATCHER_TIME (ev_timer) ev_tstamp repeat; /* rw */ -}; +} ev_timer; /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ /* revent EV_PERIODIC */ -struct ev_periodic +typedef struct ev_periodic { EV_WATCHER_TIME (ev_periodic) ev_tstamp interval; /* rw */ ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */ -}; +} ev_periodic; /* invoked when fd is either EV_READable or EV_WRITEable */ /* revent EV_READ, EV_WRITE */ -struct ev_io +typedef struct ev_io { EV_WATCHER_LIST (ev_io) int fd; /* ro */ int events; /* ro */ -}; +} ev_io; /* invoked when the given signal has been received */ /* revent EV_SIGNAL */ -struct ev_signal +typedef struct ev_signal { EV_WATCHER_LIST (ev_signal) int signum; /* ro */ -}; +} ev_signal; /* invoked when the nothing else needs to be done, keeps the process from blocking */ /* revent EV_IDLE */ -struct ev_idle +typedef struct ev_idle { EV_WATCHER (ev_idle) -}; +} ev_idle; /* invoked for each run of the mainloop, just before the blocking call */ /* you can still change events in any way you like */ /* revent EV_PREPARE */ -struct ev_prepare +typedef struct ev_prepare { EV_WATCHER (ev_prepare) -}; +} ev_prepare; /* invoked for each run of the mainloop, just after the blocking call */ /* revent EV_CHECK */ -struct ev_check +typedef struct ev_check { EV_WATCHER (ev_check) -}; +} ev_check; /* invoked when sigchld is received and waitpid indicates the given pid */ /* revent EV_CHILD */ /* does not support priorities */ -struct ev_child +typedef struct ev_child { EV_WATCHER_LIST (ev_child) int pid; /* ro */ int rpid; /* rw, holds the received pid */ int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ -}; +} ev_child; -#if EV_MULTIPLICITY +#if EV_EMBED_ENABLE /* used to embed an event loop inside another */ /* the callback gets invoked when the event loop has handled events, and can be 0 */ -struct ev_embed +typedef struct ev_embed { EV_WATCHER (ev_embed) - struct ev_io io; /* private */ + ev_io io; /* private */ struct ev_loop *loop; /* ro */ -}; +} ev_embed; +#endif + +#if EV_STAT_ENABLE +/* st_nlink = 0 means missing file or other error */ +typedef struct stat ev_statdata; + +/* invoked each time the stat data changes for a given path */ +/* revent EV_STAT */ +typedef struct ev_stat +{ + EV_WATCHER (ev_stat) + + ev_timer timer; /* private */ + ev_tstamp interval; /* rw */ + const char *path; /* ro */ + ev_statdata prev; /* ro */ + ev_statdata attr; /* ro */ +} ev_stat; #endif /* the presence of this union forces similar struct layout */ @@ -242,7 +277,12 @@ union ev_any_watcher struct ev_check check; struct ev_signal signal; struct ev_child child; +#if EV_EMBED_ENABLE struct ev_embed embed; +#endif +#if EV_STAT_ENABLE + struct ev_stat stat; +#endif }; /* bits for ev_default_loop and ev_loop_new */ @@ -329,6 +369,7 @@ unsigned int ev_backend (EV_P); #define EVLOOP_NONBLOCK 1 /* do not block/wait */ #define EVLOOP_ONESHOT 2 /* block *once* only */ +#define EVUNLOOP_CANCEL 0 /* undo unloop */ #define EVUNLOOP_ONE 1 /* unloop once */ #define EVUNLOOP_ALL 2 /* unloop all loops */ @@ -352,9 +393,9 @@ void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revent /* these may evaluate ev multiple times, and the other arguments at most once */ /* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ #define ev_init(ev,cb_) do { \ - ((struct ev_watcher *)(void *)(ev))->active = \ - ((struct ev_watcher *)(void *)(ev))->pending = \ - ((struct ev_watcher *)(void *)(ev))->priority = 0; \ + ((ev_watcher *)(void *)(ev))->active = \ + ((ev_watcher *)(void *)(ev))->pending = \ + ((ev_watcher *)(void *)(ev))->priority = 0; \ ev_set_cb ((ev), cb_); \ } while (0) @@ -367,6 +408,7 @@ void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revent #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ #define ev_child_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) #define ev_embed_set(ev,loop_) do { (ev)->loop = (loop_); } while (0) +#define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); } while (0) #define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) #define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) @@ -377,11 +419,12 @@ void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revent #define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0) #define ev_child_init(ev,cb,pid) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0) #define ev_embed_init(ev,cb,loop) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(loop)); } while (0) +#define ev_stat_init(ev,cb,path,interval) do { ev_init ((ev), (cb)); ev_path_set ((ev),(path),(interval)); } while (0) -#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_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */ +#define ev_is_active(ev) (0 + ((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_priority(ev) ((ev_watcher *)(void *)(ev))->priority /* rw */ #define ev_cb(ev) (ev)->cb /* rw */ #define ev_set_priority(ev,pri) ev_priority (ev) = (pri) @@ -399,41 +442,48 @@ 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_io_start (EV_P_ ev_io *w); +void ev_io_stop (EV_P_ 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_start (EV_P_ ev_timer *w); +void ev_timer_stop (EV_P_ 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_timer_again (EV_P_ ev_timer *w); -#if EV_PERIODICS -void ev_periodic_start (EV_P_ struct ev_periodic *w); -void ev_periodic_stop (EV_P_ struct ev_periodic *w); -void ev_periodic_again (EV_P_ struct ev_periodic *w); +#if EV_PERIODIC_ENABLE +void ev_periodic_start (EV_P_ ev_periodic *w); +void ev_periodic_stop (EV_P_ ev_periodic *w); +void ev_periodic_again (EV_P_ ev_periodic *w); #endif -void ev_idle_start (EV_P_ struct ev_idle *w); -void ev_idle_stop (EV_P_ struct ev_idle *w); +void ev_idle_start (EV_P_ ev_idle *w); +void ev_idle_stop (EV_P_ 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 (EV_P_ ev_prepare *w); +void ev_prepare_stop (EV_P_ 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 (EV_P_ ev_check *w); +void ev_check_stop (EV_P_ 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_signal_start (EV_P_ ev_signal *w); +void ev_signal_stop (EV_P_ 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); +void ev_child_start (EV_P_ ev_child *w); +void ev_child_stop (EV_P_ ev_child *w); -# if EV_MULTIPLICITY +# if EV_EMBED_ENABLE /* only supported when loop to be embedded is in fact embeddable */ -void ev_embed_start (EV_P_ struct ev_embed *w); -void ev_embed_stop (EV_P_ struct ev_embed *w); +void ev_embed_start (EV_P_ ev_embed *w); +void ev_embed_stop (EV_P_ ev_embed *w); +void ev_embed_sweep (EV_P_ ev_embed *w); +# endif + +# if EV_STAT_ENABLE +void ev_stat_start (EV_P_ ev_stat *w); +void ev_stat_stop (EV_P_ ev_stat *w); +void ev_stat_stat (EV_P_ ev_stat *w); # endif #endif