diff options
Diffstat (limited to 'ev.c')
| -rw-r--r-- | ev.c | 206 |
1 files changed, 197 insertions, 9 deletions
@@ -96,6 +96,14 @@ extern "C" { # endif # endif +# ifndef EV_USE_INOTIFY +# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H +# define EV_USE_INOTIFY 1 +# else +# define EV_USE_INOTIFY 0 +# endif +# endif + #endif #include <math.h> @@ -112,6 +120,12 @@ extern "C" { #include <signal.h> +#ifdef EV_H +# include EV_H +#else +# include "ev.h" +#endif + #ifndef _WIN32 # include <sys/time.h> # include <sys/wait.h> @@ -158,6 +172,10 @@ extern "C" { # define EV_USE_PORT 0 #endif +#ifndef EV_USE_INOTIFY +# define EV_USE_INOTIFY 0 +#endif + #ifndef EV_PID_HASHSIZE # if EV_MINIMAL # define EV_PID_HASHSIZE 1 @@ -166,6 +184,14 @@ extern "C" { # endif #endif +#ifndef EV_INOTIFY_HASHSIZE +# if EV_MINIMAL +# define EV_INOTIFY_HASHSIZE 1 +# else +# define EV_INOTIFY_HASHSIZE 16 +# endif +#endif + /**/ #ifndef CLOCK_MONOTONIC @@ -182,18 +208,20 @@ extern "C" { # include <winsock.h> #endif +#if !EV_STAT_ENABLE +# define EV_USE_INOTIFY 0 +#endif + +#if EV_USE_INOTIFY +# include <sys/inotify.h> +#endif + /**/ #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ /*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */ -#ifdef EV_H -# include EV_H -#else -# include "ev.h" -#endif - #if __GNUC__ >= 3 # define expect(expr,value) __builtin_expect ((expr),(value)) # define inline_size static inline /* inline for codesize */ @@ -298,6 +326,13 @@ typedef struct int events; } ANPENDING; +typedef struct +{ +#if EV_USE_INOTIFY + WL head; +#endif +} ANFS; + #if EV_MULTIPLICITY struct ev_loop @@ -881,6 +916,11 @@ loop_init (EV_P_ unsigned int flags) flags |= ev_recommended_backends (); backend = 0; + backend_fd = -1; +#if EV_USE_INOTIFY + fs_fd = -2; +#endif + #if EV_USE_PORT if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); #endif @@ -907,6 +947,14 @@ loop_destroy (EV_P) { int i; +#if EV_USE_INOTIFY + if (fs_fd >= 0) + close (fs_fd); +#endif + + if (backend_fd >= 0) + close (backend_fd); + #if EV_USE_PORT if (backend == EVBACKEND_PORT ) port_destroy (EV_A); #endif @@ -1667,6 +1715,127 @@ ev_child_stop (EV_P_ ev_child *w) #define DEF_STAT_INTERVAL 5.0074891 #define MIN_STAT_INTERVAL 0.1074891 +void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); + +#if EV_USE_INOTIFY +# define EV_INOTIFY_BUFSIZE ((PATH_MAX + sizeof (struct inotify_event)) + 2048) + +static void noinline +infy_add (EV_P_ ev_stat *w) +{ + w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); + + if (w->wd < 0) + { + ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ + + /* monitor some parent directory for speedup hints */ + if (errno == ENOENT || errno == EACCES) + { + char path [PATH_MAX]; + strcpy (path, w->path); + + do + { + int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF + | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); + + char *pend = strrchr (path, '/'); + + if (!pend) + break; /* whoops, no '/', complain to your admin */ + + *pend = 0; + w->wd = inotify_add_watch (fs_fd, path, IN_DELETE_SELF | IN_CREATE | IN_MOVED_TO | IN_MASK_ADD); + } + while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); + } + } + else + ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */ + + if (w->wd >= 0) + wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); +} + +static void noinline +infy_del (EV_P_ ev_stat *w) +{ + WL w_; + int slot; + int wd = w->wd; + + if (wd < 0) + return; + + w->wd = -2; + slot = wd & (EV_INOTIFY_HASHSIZE - 1); + wlist_del (&fs_hash [slot].head, (WL)w); + + /* remove this watcher, if others are watching it, they will rearm */ + inotify_rm_watch (fs_fd, wd); +} + +static void noinline +infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) +{ + if (slot < 0) + /* overflow, need to check for all hahs slots */ + for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) + infy_wd (EV_A_ slot, wd, ev); + else + { + WL w_; + + for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) + { + ev_stat *w = (ev_stat *)w_; + w_ = w_->next; /* lets us remove this watcher and all before it */ + + if (w->wd == wd || wd == -1) + { + if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) + { + w->wd = -1; + infy_add (EV_A_ w); /* re-add, no matter what */ + } + + stat_timer_cb (EV_P_ &w->timer, 0); + } + } + } +} + +static void +infy_cb (EV_P_ ev_io *w, int revents) +{ + char buf [EV_INOTIFY_BUFSIZE]; + struct inotify_event *ev = (struct inotify_event *)buf; + int ofs; + int len = read (fs_fd, buf, sizeof (buf)); + + for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) + infy_wd (EV_A_ ev->wd, ev->wd, ev); +} + +void inline_size +infy_init (EV_P) +{ + if (fs_fd != -2) + return; + + fs_fd = inotify_init (); + + if (fs_fd >= 0) + { + ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); + ev_set_priority (&fs_w, EV_MAXPRI); + ev_io_start (EV_A_ &fs_w); + } +} + +#endif + void ev_stat_stat (EV_P_ ev_stat *w) { @@ -1676,7 +1845,7 @@ ev_stat_stat (EV_P_ ev_stat *w) w->attr.st_nlink = 1; } -static void +void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents) { ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); @@ -1687,7 +1856,15 @@ stat_timer_cb (EV_P_ ev_timer *w_, int revents) ev_stat_stat (EV_A_ w); if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata))) - ev_feed_event (EV_A_ w, EV_STAT); + { + #if EV_USE_INOTIFY + infy_del (EV_A_ w); + infy_add (EV_A_ w); + ev_stat_stat (EV_A_ w); /* avoid race... */ + #endif + + ev_feed_event (EV_A_ w, EV_STAT); + } } void @@ -1707,7 +1884,15 @@ ev_stat_start (EV_P_ ev_stat *w) ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); ev_set_priority (&w->timer, ev_priority (w)); - ev_timer_start (EV_A_ &w->timer); + +#if EV_USE_INOTIFY + infy_init (EV_A); + + if (fs_fd >= 0) + infy_add (EV_A_ w); + else +#endif + ev_timer_start (EV_A_ &w->timer); ev_start (EV_A_ (W)w, 1); } @@ -1719,6 +1904,9 @@ ev_stat_stop (EV_P_ ev_stat *w) if (expect_false (!ev_is_active (w))) return; +#if EV_USE_INOTIFY + infy_del (EV_A_ w); +#endif ev_timer_stop (EV_A_ &w->timer); ev_stop (EV_A_ (W)w); |