X-Git-Url: https://git.llucax.com/software/libev.git/blobdiff_plain/73ce65a9122dd90fac253802fe20630572fdd4be..0a7b0ac074d9987c6fa23ab20be4842e4514c7b9:/ev.h diff --git a/ev.h b/ev.h index 0e56875..946963d 100644 --- a/ev.h +++ b/ev.h @@ -48,8 +48,26 @@ 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 + +/*****************************************************************************/ + +#if EV_STAT_ENABLE +# include #endif /* support multiple event loops? */ @@ -59,31 +77,35 @@ 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 -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_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 @@ -144,6 +166,16 @@ 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 */ typedef struct ev_timer @@ -163,16 +195,6 @@ typedef struct ev_periodic 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 */ -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 */ typedef struct ev_signal @@ -182,6 +204,42 @@ typedef struct 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_LIST (ev_stat) + + ev_timer timer; /* private */ + ev_tstamp interval; /* ro */ + const char *path; /* ro */ + ev_statdata prev; /* ro */ + ev_statdata attr; /* ro */ + + int wd; /* wd for inotify, fd for kqueue */ +} ev_stat; +#endif + /* invoked when the nothing else needs to be done, keeps the process from blocking */ /* revent EV_IDLE */ typedef struct ev_idle @@ -204,19 +262,15 @@ 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 */ -typedef 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) - - 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; + EV_WATCHER (ev_fork) +} ev_fork; +#endif -#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 */ typedef struct ev_embed @@ -237,12 +291,18 @@ 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_MULTIPLICITY +#if EV_FORK_ENABLE + struct ev_fork fork; +#endif +#if EV_EMBED_ENABLE struct ev_embed embed; #endif }; @@ -252,6 +312,7 @@ union ev_any_watcher #define EVFLAG_AUTO 0x00000000UL /* not quite a mask */ /* flag bits */ #define EVFLAG_NOENV 0x01000000UL /* do NOT consult environment */ +#define EVFLAG_FORKCHECK 0x02000000UL /* check for a fork in each iteration */ /* method bits to be ored together */ #define EVBACKEND_SELECT 0x00000001UL /* about anywhere */ #define EVBACKEND_POLL 0x00000002UL /* !win */ @@ -327,6 +388,7 @@ void ev_default_destroy (void); /* destroy the default loop */ void ev_default_fork (void); unsigned int ev_backend (EV_P); +unsigned int ev_loop_count (EV_P); #endif #define EVLOOP_NONBLOCK 1 /* do not block/wait */ @@ -365,21 +427,25 @@ 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_); (ev)->wd = -2; } 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 + ((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 */ @@ -410,12 +476,26 @@ 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_ ev_timer *w); -#if EV_PERIODICS +#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 +/* 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); + +# 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_idle_start (EV_P_ ev_idle *w); void ev_idle_stop (EV_P_ ev_idle *w); @@ -425,15 +505,12 @@ 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); -/* 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); +# 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_MULTIPLICITY +# 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);