X-Git-Url: https://git.llucax.com/software/libev.git/blobdiff_plain/2dff0867c6069c41ede598cd78bb2d5223fde025..69279317e8626dfa1b0d6719ac4e0d68d525645b:/ev.h diff --git a/ev.h b/ev.h index 3f00918..db79520 100644 --- a/ev.h +++ b/ev.h @@ -48,8 +48,28 @@ 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_FORK_ENABLE +# define EV_FORK_ENABLE 1 +#endif + +#ifndef EV_EMBED_ENABLE +# define EV_EMBED_ENABLE 1 +#endif + +/*****************************************************************************/ + +#include /* for size_t */ + +#if EV_STAT_ENABLE +# include #endif /* support multiple event loops? */ @@ -59,30 +79,35 @@ struct ev_loop; # define EV_P_ EV_P, # define EV_A loop # define EV_A_ EV_A, -# define EV_DEFAULT_A ev_default_loop (0) -# define EV_DEFAULT_A_ EV_DEFAULT_A, +# define EV_DEFAULT ev_default_loop (0) +# define EV_DEFAULT_ EV_DEFAULT, #else # define EV_P void # define EV_P_ # define EV_A # define EV_A_ -# define EV_DEFAULT_A -# define EV_DEFAULT_A_ +# define EV_DEFAULT +# define EV_DEFAULT_ + +# undef EV_EMBED_ENABLE #endif /* eventmask, revents, events... */ -#define EV_UNDEF -1 /* guaranteed to be invalid */ -#define EV_NONE 0x00 -#define EV_READ 0x01 /* io only */ -#define EV_WRITE 0x02 /* io only */ -#define EV_TIMEOUT 0x000100 /* timer only */ -#define EV_PERIODIC 0x000200 /* periodic timer only */ -#define EV_SIGNAL 0x000400 /* signal only */ -#define EV_IDLE 0x000800 /* idle only */ -#define EV_CHECK 0x001000 /* check only */ -#define EV_PREPARE 0x002000 /* prepare only */ -#define EV_CHILD 0x004000 /* child/pid only */ -#define EV_ERROR 0x800000 /* 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_CHILD 0x00000800L /* child/pid had status change */ +#define EV_STAT 0x00001000L /* stat data changed */ +#define EV_IDLE 0x00002000L /* event loop is idling */ +#define EV_PREPARE 0x00004000L /* event loop about to poll */ +#define EV_CHECK 0x00008000L /* event loop finished poll */ +#define EV_EMBED 0x00010000L /* embedded event loop needs sweep */ +#define EV_FORK 0x00020000L /* event loop resumed in child */ +#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 @@ -126,94 +151,136 @@ 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 when fd is either EV_READable or EV_WRITEable */ +/* revent EV_READ, EV_WRITE */ +typedef struct ev_io +{ + EV_WATCHER_LIST (ev_io) + + int fd; /* ro */ + int events; /* ro */ +} ev_io; /* 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 */ -}; - -/* invoked when fd is either EV_READable or EV_WRITEable */ -/* revent EV_READ, EV_WRITE */ -struct ev_io -{ - EV_WATCHER_LIST (ev_io) - - int fd; /* ro */ - int events; /* ro */ -}; +} ev_periodic; /* 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 sigchld is received and waitpid indicates the given pid */ +/* revent EV_CHILD */ +/* does not support priorities */ +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_STAT_ENABLE +/* st_nlink = 0 means missing file or other error */ +#ifdef _WIN32 +typedef struct _stati64 ev_statdata; +#else +typedef struct stat ev_statdata; +#endif + +/* 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; /* ro */ + const char *path; /* ro */ + ev_statdata prev; /* ro */ + ev_statdata attr; /* ro */ +} ev_stat; +#endif /* 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 givne pid */ -/* revent EV_CHILD */ -/* does not support priorities */ -struct ev_child +#if EV_FORK_ENABLE +/* the callback gets invoked before check in the child process when a fork was detected */ +typedef struct ev_fork { - EV_WATCHER_LIST (ev_child) + EV_WATCHER (ev_fork) +} ev_fork; +#endif - int pid; /* ro */ - int rpid; /* rw, holds the received pid */ - int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ -}; +#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 */ +typedef struct ev_embed +{ + EV_WATCHER (ev_embed) + + ev_io io; /* private */ + struct ev_loop *loop; /* ro */ +} ev_embed; +#endif /* the presence of this union forces similar struct layout */ union ev_any_watcher @@ -224,27 +291,43 @@ union ev_any_watcher struct ev_io io; struct ev_timer timer; struct ev_periodic periodic; + struct ev_signal signal; + struct ev_child child; +#if EV_STAT_ENABLE + struct ev_stat stat; +#endif struct ev_idle idle; struct ev_prepare prepare; struct ev_check check; - struct ev_signal signal; - struct ev_child child; +#if EV_FORK_ENABLE + struct ev_fork fork; +#endif +#if EV_EMBED_ENABLE + struct ev_embed embed; +#endif }; -#define EVMETHOD_AUTO 0 /* consults environment */ -#define EVMETHOD_SELECT 1 -#define EVMETHOD_POLL 2 -#define EVMETHOD_EPOLL 4 -#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 */ +/* bits for ev_default_loop and ev_loop_new */ +/* the default */ +#define EVFLAG_AUTO 0x00000000UL /* not quite a mask */ +/* flag bits */ +#define EVFLAG_NOENV 0x01000000UL /* do NOT consult environment */ +/* method bits to be ored together */ +#define EVBACKEND_SELECT 0x00000001UL /* about anywhere */ +#define EVBACKEND_POLL 0x00000002UL /* !win */ +#define EVBACKEND_EPOLL 0x00000004UL /* linux */ +#define EVBACKEND_KQUEUE 0x00000008UL /* bsd */ +#define EVBACKEND_DEVPOLL 0x00000010UL /* solaris 8 */ /* NYI */ +#define EVBACKEND_PORT 0x00000020UL /* solaris 10 */ #if EV_PROTOTYPES int ev_version_major (void); int ev_version_minor (void); +unsigned int ev_supported_backends (void); +unsigned int ev_recommended_backends (void); +unsigned int ev_embeddable_backends (void); + ev_tstamp ev_time (void); /* Sets the allocation function to use, works like realloc. @@ -253,7 +336,7 @@ ev_tstamp ev_time (void); * or take some potentially destructive action. * The default is your system realloc function. */ -void ev_set_allocator (void *(*cb)(void *ptr, long size)); +void ev_set_allocator (void *(*cb)(void *ptr, size_t size)); /* set the callback function to call on a * retryable syscall error @@ -264,10 +347,20 @@ 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 */ +static struct ev_loop * +ev_default_loop (unsigned int flags) +{ + extern struct ev_loop *ev_default_loop_ptr; + extern struct ev_loop *ev_default_loop_init (unsigned int flags); + + if (!ev_default_loop_ptr) + ev_default_loop_init (flags); + + return ev_default_loop_ptr; +} /* create and destroy alternative loops that don't handle signals */ -struct ev_loop *ev_loop_new (int methods); +struct ev_loop *ev_loop_new (unsigned int flags); void ev_loop_destroy (EV_P); void ev_loop_fork (EV_P); @@ -275,7 +368,7 @@ ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after # else -int ev_default_loop (int methods); /* returns true when successful */ +int ev_default_loop (unsigned int flags); /* returns true when successful */ static ev_tstamp ev_now (void) @@ -293,12 +386,13 @@ void ev_default_destroy (void); /* destroy the default loop */ /* you can actually call it at any time, anywhere :) */ void ev_default_fork (void); -int ev_method (EV_P); +unsigned int ev_backend (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_CANCEL 0 /* undo unloop */ +#define EVUNLOOP_ONE 1 /* unloop once */ #define EVUNLOOP_ALL 2 /* unloop all loops */ #if EV_PROTOTYPES @@ -321,9 +415,9 @@ 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) @@ -331,24 +425,30 @@ void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revent #define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } 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_child_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) +#define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); } 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 */ #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_fork_set(ev) /* nop, yes, this is a serious in-joke */ #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) #define ev_periodic_init(ev,cb,at,ival,res) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(at),(ival),(res)); } while (0) #define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) +#define ev_child_init(ev,cb,pid) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid)); } 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_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) #define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) #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_fork_init(ev,cb) do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } 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) @@ -366,36 +466,55 @@ 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); +/* only supported in the default loop */ +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_ ev_child *w); +void ev_child_stop (EV_P_ ev_child *w); -void ev_prepare_start (EV_P_ struct ev_prepare *w); -void ev_prepare_stop (EV_P_ struct ev_prepare *w); +# 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 -void ev_check_start (EV_P_ struct ev_check *w); -void ev_check_stop (EV_P_ struct ev_check *w); +void ev_idle_start (EV_P_ ev_idle *w); +void ev_idle_stop (EV_P_ ev_idle *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_prepare_start (EV_P_ ev_prepare *w); +void ev_prepare_stop (EV_P_ ev_prepare *w); + +void ev_check_start (EV_P_ ev_check *w); +void ev_check_stop (EV_P_ ev_check *w); + +# if EV_FORK_ENABLE +void ev_fork_start (EV_P_ ev_fork *w); +void ev_fork_stop (EV_P_ ev_fork *w); +# endif + +# if EV_EMBED_ENABLE +/* only supported when loop to be embedded is in fact embeddable */ +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 -/* 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