#include <math.h>
#include <stdlib.h>
-#include <unistd.h>
#include <fcntl.h>
-#include <signal.h>
#include <stddef.h>
#include <stdio.h>
#include <assert.h>
#include <errno.h>
#include <sys/types.h>
+#include <time.h>
+
+#include <signal.h>
+
#ifndef WIN32
+# include <unistd.h>
+# include <sys/time.h>
# include <sys/wait.h>
#endif
-#include <sys/time.h>
-#include <time.h>
-
/**/
#ifndef EV_USE_MONOTONIC
#ifndef EV_USE_WIN32
# ifdef WIN32
-# define EV_USE_WIN32 1
+# define EV_USE_WIN32 0 /* it does not exist, use select */
+# undef EV_USE_SELECT
+# define EV_USE_SELECT 1
# else
# define EV_USE_WIN32 0
# endif
#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
-#include "ev.h"
+#ifdef EV_H
+# include EV_H
+#else
+# include "ev.h"
+#endif
#if __GNUC__ >= 3
# define expect(expr,value) __builtin_expect ((expr),(value))
static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
+#include "ev_win32.c"
+
+/*****************************************************************************/
+
+static void (*syserr_cb)(const char *msg);
+
+void ev_set_syserr_cb (void (*cb)(const char *msg))
+{
+ syserr_cb = cb;
+}
+
+static void
+syserr (const char *msg)
+{
+ if (!msg)
+ msg = "(libev) system error";
+
+ if (syserr_cb)
+ syserr_cb (msg);
+ else
+ {
+ perror (msg);
+ abort ();
+ }
+}
+
+static void *(*alloc)(void *ptr, long size);
+
+void ev_set_allocator (void *(*cb)(void *ptr, long size))
+{
+ alloc = cb;
+}
+
+static void *
+ev_realloc (void *ptr, long size)
+{
+ ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
+
+ if (!ptr && size)
+ {
+ fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
+ abort ();
+ }
+
+ return ptr;
+}
+
+#define ev_malloc(size) ev_realloc (0, (size))
+#define ev_free(ptr) ev_realloc ((ptr), 0)
+
/*****************************************************************************/
typedef struct
{
- struct ev_watcher_list *head;
+ WL head;
unsigned char events;
unsigned char reify;
} ANFD;
#if EV_MULTIPLICITY
-struct ev_loop
-{
-# define VAR(name,decl) decl;
-# include "ev_vars.h"
-};
-# undef VAR
-# include "ev_wrap.h"
+ struct ev_loop
+ {
+ #define VAR(name,decl) decl;
+ #include "ev_vars.h"
+ #undef VAR
+ };
+ #include "ev_wrap.h"
+
+ struct ev_loop default_loop_struct;
+ static struct ev_loop *default_loop;
#else
-# define VAR(name,decl) static decl;
-# include "ev_vars.h"
-# undef VAR
+ #define VAR(name,decl) static decl;
+ #include "ev_vars.h"
+ #undef VAR
+
+ static int default_loop;
#endif
return rt_now;
}
-#define array_roundsize(base,n) ((n) | 4 & ~3)
-
-#define array_needsize(base,cur,cnt,init) \
- if (expect_false ((cnt) > cur)) \
- { \
- int newcnt = cur; \
- do \
- { \
- newcnt = array_roundsize (base, newcnt << 1); \
- } \
- while ((cnt) > newcnt); \
- \
- base = realloc (base, sizeof (*base) * (newcnt)); \
- init (base + cur, newcnt - cur); \
- cur = newcnt; \
+#define array_roundsize(type,n) ((n) | 4 & ~3)
+
+#define array_needsize(type,base,cur,cnt,init) \
+ if (expect_false ((cnt) > cur)) \
+ { \
+ int newcnt = cur; \
+ do \
+ { \
+ newcnt = array_roundsize (type, newcnt << 1); \
+ } \
+ while ((cnt) > newcnt); \
+ \
+ base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
+ init (base + cur, newcnt - cur); \
+ cur = newcnt; \
+ }
+
+#define array_slim(type,stem) \
+ if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
+ { \
+ stem ## max = array_roundsize (stem ## cnt >> 1); \
+ base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
+ fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
}
+/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
+/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
+#define array_free_microshit(stem) \
+ ev_free (stem ## s); stem ## cnt = stem ## max = 0;
+
#define array_free(stem, idx) \
- free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
+ ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
/*****************************************************************************/
}
}
-static void
-event (EV_P_ W w, int events)
+void
+ev_feed_event (EV_P_ void *w, int revents)
{
- if (w->pending)
+ W w_ = (W)w;
+
+ if (w_->pending)
{
- pendings [ABSPRI (w)][w->pending - 1].events |= events;
+ pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
return;
}
- w->pending = ++pendingcnt [ABSPRI (w)];
- array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
- pendings [ABSPRI (w)][w->pending - 1].w = w;
- pendings [ABSPRI (w)][w->pending - 1].events = events;
+ w_->pending = ++pendingcnt [ABSPRI (w_)];
+ array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
+ pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
+ pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
}
static void
int i;
for (i = 0; i < eventcnt; ++i)
- event (EV_A_ events [i], type);
+ ev_feed_event (EV_A_ events [i], type);
}
-static void
-fd_event (EV_P_ int fd, int events)
+inline void
+fd_event (EV_P_ int fd, int revents)
{
ANFD *anfd = anfds + fd;
struct ev_io *w;
for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
{
- int ev = w->events & events;
+ int ev = w->events & revents;
if (ev)
- event (EV_A_ (W)w, ev);
+ ev_feed_event (EV_A_ (W)w, ev);
}
}
+void
+ev_feed_fd_event (EV_P_ int fd, int revents)
+{
+ fd_event (EV_A_ fd, revents);
+}
+
/*****************************************************************************/
static void
static void
fd_change (EV_P_ int fd)
{
- if (anfds [fd].reify || fdchangecnt < 0)
+ if (anfds [fd].reify)
return;
anfds [fd].reify = 1;
++fdchangecnt;
- array_needsize (fdchanges, fdchangemax, fdchangecnt, );
+ array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
fdchanges [fdchangecnt - 1] = fd;
}
while ((w = (struct ev_io *)anfds [fd].head))
{
ev_io_stop (EV_A_ w);
- event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
+ ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
}
}
+static int
+fd_valid (int fd)
+{
+#ifdef WIN32
+ return !!win32_get_osfhandle (fd);
+#else
+ return fcntl (fd, F_GETFD) != -1;
+#endif
+}
+
/* called on EBADF to verify fds */
static void
fd_ebadf (EV_P)
for (fd = 0; fd < anfdmax; ++fd)
if (anfds [fd].events)
- if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
+ if (!fd_valid (fd) == -1 && errno == EBADF)
fd_kill (EV_A_ fd);
}
for (fd = anfdmax; fd--; )
if (anfds [fd].events)
{
- close (fd);
fd_kill (EV_A_ fd);
return;
}
}
-/* susually called after fork if method needs to re-arm all fds from scratch */
+/* usually called after fork if method needs to re-arm all fds from scratch */
static void
fd_rearm_all (EV_P)
{
((W)heap [k])->active = k + 1;
}
+inline void
+adjustheap (WT *heap, int N, int k, ev_tstamp at)
+{
+ ev_tstamp old_at = heap [k]->at;
+ heap [k]->at = at;
+
+ if (old_at < at)
+ downheap (heap, N, k);
+ else
+ upheap (heap, k);
+}
+
/*****************************************************************************/
typedef struct
{
- struct ev_watcher_list *head;
+ WL head;
sig_atomic_t volatile gotsig;
} ANSIG;
static void
sighandler (int signum)
{
+#if WIN32
+ signal (signum, sighandler);
+#endif
+
signals [signum - 1].gotsig = 1;
if (!gotsig)
{
int old_errno = errno;
gotsig = 1;
+#ifdef WIN32
+ send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
+#else
write (sigpipe [1], &signum, 1);
+#endif
errno = old_errno;
}
}
+void
+ev_feed_signal_event (EV_P_ int signum)
+{
+ WL w;
+
+#if EV_MULTIPLICITY
+ assert (("feeding signal events is only supported in the default loop", loop == default_loop));
+#endif
+
+ --signum;
+
+ if (signum < 0 || signum >= signalmax)
+ return;
+
+ signals [signum].gotsig = 0;
+
+ for (w = signals [signum].head; w; w = w->next)
+ ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
+}
+
static void
sigcb (EV_P_ struct ev_io *iow, int revents)
{
- struct ev_watcher_list *w;
int signum;
+#ifdef WIN32
+ recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
+#else
read (sigpipe [0], &revents, 1);
+#endif
gotsig = 0;
for (signum = signalmax; signum--; )
if (signals [signum].gotsig)
- {
- signals [signum].gotsig = 0;
-
- for (w = signals [signum].head; w; w = w->next)
- event (EV_A_ (W)w, EV_SIGNAL);
- }
+ ev_feed_signal_event (EV_A_ signum + 1);
}
static void
/*****************************************************************************/
+static struct ev_child *childs [PID_HASHSIZE];
+
#ifndef WIN32
-static struct ev_child *childs [PID_HASHSIZE];
static struct ev_signal childev;
#ifndef WCONTINUED
ev_priority (w) = ev_priority (sw); /* need to do it *now* */
w->rpid = pid;
w->rstatus = status;
- event (EV_A_ (W)w, EV_CHILD);
+ ev_feed_event (EV_A_ (W)w, EV_CHILD);
}
}
if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
{
/* make sure we are called again until all childs have been reaped */
- event (EV_A_ (W)sw, EV_SIGNAL);
+ ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
child_reap (EV_A_ sw, pid, pid, status);
child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
#if EV_USE_SELECT
if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
#endif
+
+ ev_init (&sigev, sigcb);
+ ev_set_priority (&sigev, EV_MAXPRI);
}
}
for (i = NUMPRI; i--; )
array_free (pending, [i]);
- array_free (fdchange, );
- array_free (timer, );
- array_free (periodic, );
- array_free (idle, );
- array_free (prepare, );
- array_free (check, );
+ /* have to use the microsoft-never-gets-it-right macro */
+ array_free_microshit (fdchange);
+ array_free_microshit (timer);
+ array_free_microshit (periodic);
+ array_free_microshit (idle);
+ array_free_microshit (prepare);
+ array_free_microshit (check);
method = 0;
- /*TODO*/
}
-void
+static void
loop_fork (EV_P)
{
- /*TODO*/
#if EV_USE_EPOLL
if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
#endif
#if EV_USE_KQUEUE
if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
#endif
+
+ if (ev_is_active (&sigev))
+ {
+ /* default loop */
+
+ ev_ref (EV_A);
+ ev_io_stop (EV_A_ &sigev);
+ close (sigpipe [0]);
+ close (sigpipe [1]);
+
+ while (pipe (sigpipe))
+ syserr ("(libev) error creating pipe");
+
+ siginit (EV_A);
+ }
+
+ postfork = 0;
}
#if EV_MULTIPLICITY
struct ev_loop *
ev_loop_new (int methods)
{
- struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
+ struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
+
+ memset (loop, 0, sizeof (struct ev_loop));
loop_init (EV_A_ methods);
ev_loop_destroy (EV_P)
{
loop_destroy (EV_A);
- free (loop);
+ ev_free (loop);
}
void
ev_loop_fork (EV_P)
{
- loop_fork (EV_A);
+ postfork = 1;
}
#endif
#if EV_MULTIPLICITY
-struct ev_loop default_loop_struct;
-static struct ev_loop *default_loop;
-
struct ev_loop *
#else
-static int default_loop;
-
int
#endif
ev_default_loop (int methods)
if (ev_method (EV_A))
{
- ev_watcher_init (&sigev, sigcb);
- ev_set_priority (&sigev, EV_MAXPRI);
siginit (EV_A);
#ifndef WIN32
struct ev_loop *loop = default_loop;
#endif
+#ifndef WIN32
ev_ref (EV_A); /* child watcher */
ev_signal_stop (EV_A_ &childev);
+#endif
ev_ref (EV_A); /* signal watcher */
ev_io_stop (EV_A_ &sigev);
struct ev_loop *loop = default_loop;
#endif
- loop_fork (EV_A);
-
- ev_io_stop (EV_A_ &sigev);
- close (sigpipe [0]);
- close (sigpipe [1]);
- pipe (sigpipe);
-
- ev_ref (EV_A); /* signal watcher */
- siginit (EV_A);
+ if (method)
+ postfork = 1;
}
/*****************************************************************************/
+static int
+any_pending (EV_P)
+{
+ int pri;
+
+ for (pri = NUMPRI; pri--; )
+ if (pendingcnt [pri])
+ return 1;
+
+ return 0;
+}
+
static void
call_pending (EV_P)
{
if (p->w)
{
p->w->pending = 0;
-
- ((void (*)(EV_P_ W, int))p->w->cb) (EV_A_ p->w, p->events);
+ EV_CB_INVOKE (p->w, p->events);
}
}
}
else
ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
- event (EV_A_ (W)w, EV_TIMEOUT);
+ ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
}
}
assert (("inactive timer on periodic heap detected", ev_is_active (w)));
/* first reschedule or stop timer */
- if (w->interval)
+ if (w->reschedule_cb)
+ {
+ ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
+
+ assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
+ downheap ((WT *)periodics, periodiccnt, 0);
+ }
+ else if (w->interval)
{
((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
else
ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
- event (EV_A_ (W)w, EV_PERIODIC);
+ ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
}
}
{
struct ev_periodic *w = periodics [i];
- if (w->interval)
- {
- ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
-
- if (fabs (diff) >= 1e-4)
- {
- ev_periodic_stop (EV_A_ w);
- ev_periodic_start (EV_A_ w);
-
- i = 0; /* restart loop, inefficient, but time jumps should be rare */
- }
- }
+ if (w->reschedule_cb)
+ ((WT)w)->at = w->reschedule_cb (w, rt_now);
+ else if (w->interval)
+ ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
}
+
+ /* now rebuild the heap */
+ for (i = periodiccnt >> 1; i--; )
+ downheap ((WT *)periodics, periodiccnt, i);
}
inline int
call_pending (EV_A);
}
+ /* we might have forked, so reify kernel state if necessary */
+ if (expect_false (postfork))
+ loop_fork (EV_A);
+
/* update fd-related kernel structures */
fd_reify (EV_A);
/* calculate blocking time */
- /* we only need this for !monotonic clockor timers, but as we basically
+ /* we only need this for !monotonic clock or timers, but as we basically
always have timers, we just calculate it always */
#if EV_USE_MONOTONIC
if (expect_true (have_monotonic))
periodics_reify (EV_A); /* absolute timers called first */
/* queue idle watchers unless io or timers are pending */
- if (!pendingcnt)
+ if (idlecnt && !any_pending (EV_A))
queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
/* queue check watchers, to be executed first */
assert (("ev_io_start called with negative fd", fd >= 0));
ev_start (EV_A_ (W)w, 1);
- array_needsize (anfds, anfdmax, fd + 1, anfds_init);
+ array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
wlist_add ((WL *)&anfds[fd].head, (WL)w);
fd_change (EV_A_ fd);
assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
ev_start (EV_A_ (W)w, ++timercnt);
- array_needsize (timers, timermax, timercnt, );
+ array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
timers [timercnt - 1] = w;
upheap ((WT *)timers, timercnt - 1);
if (ev_is_active (w))
{
if (w->repeat)
- {
- ((WT)w)->at = mn_now + w->repeat;
- downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
- }
+ adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);
else
ev_timer_stop (EV_A_ w);
}
if (ev_is_active (w))
return;
- assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
-
- /* this formula differs from the one in periodic_reify because we do not always round up */
- if (w->interval)
- ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
+ if (w->reschedule_cb)
+ ((WT)w)->at = w->reschedule_cb (w, rt_now);
+ else if (w->interval)
+ {
+ assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
+ /* this formula differs from the one in periodic_reify because we do not always round up */
+ ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
+ }
ev_start (EV_A_ (W)w, ++periodiccnt);
- array_needsize (periodics, periodicmax, periodiccnt, );
+ array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
periodics [periodiccnt - 1] = w;
upheap ((WT *)periodics, periodiccnt - 1);
ev_stop (EV_A_ (W)w);
}
+void
+ev_periodic_again (EV_P_ struct ev_periodic *w)
+{
+ /* TODO: use adjustheap and recalculation */
+ ev_periodic_stop (EV_A_ w);
+ ev_periodic_start (EV_A_ w);
+}
+
void
ev_idle_start (EV_P_ struct ev_idle *w)
{
return;
ev_start (EV_A_ (W)w, ++idlecnt);
- array_needsize (idles, idlemax, idlecnt, );
+ array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
idles [idlecnt - 1] = w;
}
return;
ev_start (EV_A_ (W)w, ++preparecnt);
- array_needsize (prepares, preparemax, preparecnt, );
+ array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
prepares [preparecnt - 1] = w;
}
return;
ev_start (EV_A_ (W)w, ++checkcnt);
- array_needsize (checks, checkmax, checkcnt, );
+ array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
checks [checkcnt - 1] = w;
}
assert (("ev_signal_start called with illegal signal number", w->signum > 0));
ev_start (EV_A_ (W)w, 1);
- array_needsize (signals, signalmax, w->signum, signals_init);
+ array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
if (!((WL)w)->next)
{
+#if WIN32
+ signal (w->signum, sighandler);
+#else
struct sigaction sa;
sa.sa_handler = sighandler;
sigfillset (&sa.sa_mask);
sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
sigaction (w->signum, &sa, 0);
+#endif
}
}
ev_io_stop (EV_A_ &once->io);
ev_timer_stop (EV_A_ &once->to);
- free (once);
+ ev_free (once);
cb (revents, arg);
}
void
ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
{
- struct ev_once *once = malloc (sizeof (struct ev_once));
+ struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
if (!once)
cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
once->cb = cb;
once->arg = arg;
- ev_watcher_init (&once->io, once_cb_io);
+ ev_init (&once->io, once_cb_io);
if (fd >= 0)
{
ev_io_set (&once->io, fd, events);
ev_io_start (EV_A_ &once->io);
}
- ev_watcher_init (&once->to, once_cb_to);
+ ev_init (&once->to, once_cb_to);
if (timeout >= 0.)
{
ev_timer_set (&once->to, timeout, 0.);
projects / software / libev.git / blobdiff