/*
+ * libev native API header
+ *
* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
* All rights reserved.
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * Redistribution and use in source and binary forms, with or without modifica-
+ * tion, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
+ * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
+ * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
+ * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
*
- * * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * Alternatively, the contents of this file may be used under the terms of
+ * the GNU General Public License ("GPL") version 2 or any later version,
+ * in which case the provisions of the GPL are applicable instead of
+ * the above. If you wish to allow the use of your version of this file
+ * only under the terms of the GPL and not to allow others to use your
+ * version of this file under the BSD license, indicate your decision
+ * by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL. If you do not delete the
+ * provisions above, a recipient may use your version of this file under
+ * either the BSD or the GPL.
*/
#ifndef EV_H__
# 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_IDLE_ENABLE
+# define EV_IDLE_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 <sys/stat.h>
#endif
/* support multiple event loops? */
# 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_IOFDSET 0x80L /* internal use only */
+#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
# define EV_PROTOTYPES 1
#endif
-#define EV_VERSION_MAJOR 1
-#define EV_VERSION_MINOR 1
+#define EV_VERSION_MAJOR 2
+#define EV_VERSION_MINOR 0
#ifndef EV_CB_DECLARE
# define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents);
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
{
EV_WATCHER_TIME (ev_periodic)
+ ev_tstamp offset; /* rw */
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 */
-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
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
+
+#if EV_IDLE_ENABLE
/* invoked when the nothing else needs to be done, keeps the process from blocking */
/* revent EV_IDLE */
typedef struct ev_idle
{
EV_WATCHER (ev_idle)
} ev_idle;
+#endif
/* invoked for each run of the mainloop, just before the blocking call */
/* you can still change events in any way you like */
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
{
EV_WATCHER (ev_embed)
- ev_io io; /* private */
- struct ev_loop *loop; /* ro */
+ struct ev_loop *other; /* ro */
+ ev_io io; /* private */
+ ev_prepare prepare; /* private */
+ ev_check check; /* unused */
+ ev_timer timer; /* unused */
+ ev_periodic periodic; /* unused */
+ ev_idle idle; /* unused */
+ ev_fork fork; /* unused */
} ev_embed;
#endif
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
+#if EV_IDLE_ENABLE
struct ev_idle idle;
+#endif
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
};
#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 */
unsigned int ev_embeddable_backends (void);
ev_tstamp ev_time (void);
+void ev_sleep (ev_tstamp delay); /* sleep for a while */
/* Sets the allocation function to use, works like realloc.
* It is used to allocate and free memory.
/* you can actually call it at any time, anywhere :) */
void ev_default_fork (void);
-unsigned int ev_backend (EV_P);
+unsigned int ev_backend (EV_P); /* backend in use by loop */
+unsigned int ev_loop_count (EV_P); /* number of loop iterations */
#endif
#define EVLOOP_NONBLOCK 1 /* do not block/wait */
void ev_loop (EV_P_ int flags);
void ev_unloop (EV_P_ int how); /* set to 1 to break out of event loop, set to 2 to break out of all event loops */
+void ev_set_io_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */
+void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */
+
/*
* ref/unref can be used to add or remove a refcount on the mainloop. every watcher
* keeps one reference. if you have a long-runing watcher you never unregister that
/* 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 { \
+#define ev_init(ev,cb_) do { \
((ev_watcher *)(void *)(ev))->active = \
((ev_watcher *)(void *)(ev))->pending = \
((ev_watcher *)(void *)(ev))->priority = 0; \
- ev_set_cb ((ev), cb_); \
+ ev_set_cb ((ev), cb_); \
} while (0)
-#define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0)
+#define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_) | EV_IOFDSET; } while (0)
#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_periodic_set(ev,ofs_,ival_,res_) do { (ev)->offset = (ofs_); (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_embed_set(ev,other_) do { (ev)->other = (other_); } 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_stat_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_embed_init(ev,cb,other) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } 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 */
-#define ev_priority(ev) ((ev_watcher *)(void *)(ev))->priority /* rw */
+#define ev_priority(ev) ((((ev_watcher *)(void *)(ev))->priority) + 0)
#define ev_cb(ev) (ev)->cb /* rw */
-#define ev_set_priority(ev,pri) ev_priority (ev) = (pri)
+#define ev_set_priority(ev,pri) ((ev_watcher *)(void *)(ev))->priority = (pri)
#ifndef ev_set_cb
# define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_)
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_invoke (EV_P_ void *w, int revents);
+int ev_clear_pending (EV_P_ void *w);
void ev_io_start (EV_P_ ev_io *w);
void ev_io_stop (EV_P_ ev_io *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
+
+# if EV_IDLE_ENABLE
void ev_idle_start (EV_P_ ev_idle *w);
void ev_idle_stop (EV_P_ ev_idle *w);
+# endif
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);
-/* 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);
-void ev_embed_loop (EV_P_ ev_embed *w);
+void ev_embed_sweep (EV_P_ ev_embed *w);
# endif
#endif
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