avoid backend_modify call unless ev_io_set was used

[software/libev.git] / ev.h

diff --git a/ev.h b/ev.h
index 76f7a106c9bcace8913369341dbd7e7f65ca65cf..635463c77e17a7a08e0523fbdfef656c4b227cc8 100644 (file)
--- a/ev.h
+++ b/ev.h
@@ -56,6 +56,14 @@ typedef double ev_tstamp;
 # define EV_STAT_ENABLE 1
 #endif
 
 # 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
 #ifndef EV_EMBED_ENABLE
 # define EV_EMBED_ENABLE 1
 #endif


@@ -73,15 +81,15 @@ struct ev_loop;
 # define EV_P_ EV_P,
 # define EV_A loop
 # define EV_A_ EV_A,
 # 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_
 #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
 
 # undef EV_EMBED_ENABLE
 #endif


@@ -91,15 +99,17 @@ struct ev_loop;
 #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_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_TIMEOUT  0x00000100L /* timer timed out */
 #define EV_PERIODIC 0x00000200L /* periodic timer timed out */
 #define EV_SIGNAL   0x00000400L /* signal was received */

-#define EV_IDLE     0x00000800L /* event loop is idling */
-#define EV_PREPARE  0x00001000L /* event loop about to poll */
-#define EV_CHECK    0x00002000L /* event loop finished poll */
-#define EV_CHILD    0x00004000L /* child/pid had status change */
-#define EV_EMBED    0x00008000L /* embedded event loop needs sweep */
-#define EV_STAT     0x00010000L /* stat data changed */
+#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 */
 #define EV_ERROR    0x80000000L /* sent when an error occurs */
 
 /* can be used to add custom fields to all watchers, while losing binary compatibility */


@@ -110,8 +120,8 @@ struct ev_loop;
 # define EV_PROTOTYPES 1
 #endif
 
 # 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);
 
 #ifndef EV_CB_DECLARE
 # define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents);


@@ -186,6 +196,7 @@ typedef struct ev_periodic
 {
   EV_WATCHER_TIME (ev_periodic)
 
 {
   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;
   ev_tstamp interval; /* rw */
   ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */
 } ev_periodic;


@@ -213,32 +224,36 @@ typedef struct ev_child
 
 #if EV_STAT_ENABLE
 /* st_nlink = 0 means missing file or other error */
 
 #if EV_STAT_ENABLE
 /* st_nlink = 0 means missing file or other error */

-#ifdef _WIN32
+# ifdef _WIN32

 typedef struct _stati64 ev_statdata;
 typedef struct _stati64 ev_statdata;

-#else
+# else

 typedef struct stat ev_statdata;
 typedef struct stat ev_statdata;

-#endif
+# endif

 
 /* invoked each time the stat data changes for a given path */
 /* revent EV_STAT */
 typedef struct ev_stat
 {
 
 /* invoked each time the stat data changes for a given path */
 /* revent EV_STAT */
 typedef struct ev_stat
 {

-  EV_WATCHER (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 */
 
   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
 
 } 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;
 /* 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 */
 
 /* invoked for each run of the mainloop, just before the blocking call */
 /* you can still change events in any way you like */


@@ -255,6 +270,14 @@ typedef struct ev_check
   EV_WATCHER (ev_check)
 } ev_check;
 
   EV_WATCHER (ev_check)
 } ev_check;
 

+#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 (ev_fork)
+} ev_fork;
+#endif
+

 #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 */
 #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 */


@@ -276,14 +299,19 @@ union ev_any_watcher
   struct ev_io io;
   struct ev_timer timer;
   struct ev_periodic periodic;
   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_child child;
 #if EV_STAT_ENABLE
   struct ev_stat stat;
 #endif

+#if EV_IDLE_ENABLE

   struct ev_idle idle;
   struct ev_idle idle;

+#endif

   struct ev_prepare prepare;
   struct ev_check check;
   struct ev_prepare prepare;
   struct ev_check check;

-  struct ev_signal signal;
+#if EV_FORK_ENABLE
+  struct ev_fork fork;
+#endif

 #if EV_EMBED_ENABLE
   struct ev_embed embed;
 #endif
 #if EV_EMBED_ENABLE
   struct ev_embed embed;
 #endif


@@ -294,6 +322,7 @@ union ev_any_watcher
 #define EVFLAG_AUTO       0x00000000UL /* not quite a mask */
 /* flag bits */
 #define EVFLAG_NOENV      0x01000000UL /* do NOT consult environment */
 #define EVFLAG_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 */
 /* method bits to be ored together */
 #define EVBACKEND_SELECT  0x00000001UL /* about anywhere */
 #define EVBACKEND_POLL    0x00000002UL /* !win */


@@ -369,6 +398,7 @@ void ev_default_destroy (void); /* destroy the default loop */
 void ev_default_fork (void);
 
 unsigned int ev_backend (EV_P);
 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 */
 #endif
 
 #define EVLOOP_NONBLOCK        1 /* do not block/wait */


@@ -396,23 +426,24 @@ 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 */
 
 /* 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_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)
 
 } 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_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_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_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_embed_set(ev,loop_)              do { (ev)->loop = (loop_); } 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_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_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)


@@ -424,13 +455,14 @@ void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revent
 #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_embed_init(ev,cb,loop)           do { ev_init ((ev), (cb)); ev_embed_set ((ev),(loop)); } 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_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 */
 
 
 #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_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_)
 
 #ifndef ev_set_cb
 # define ev_set_cb(ev,cb_)                  ev_cb (ev) = (cb_)


@@ -445,6 +477,8 @@ void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revent
 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_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);
 
 void ev_io_start       (EV_P_ ev_io *w);
 void ev_io_stop        (EV_P_ ev_io *w);


@@ -474,8 +508,10 @@ void ev_stat_stop      (EV_P_ ev_stat *w);
 void ev_stat_stat      (EV_P_ ev_stat *w);
 # endif
 
 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);
 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_prepare_start  (EV_P_ ev_prepare *w);
 void ev_prepare_stop   (EV_P_ ev_prepare *w);


@@ -483,6 +519,11 @@ 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);
 
 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);
 # if EV_EMBED_ENABLE
 /* only supported when loop to be embedded is in fact embeddable */
 void ev_embed_start    (EV_P_ ev_embed *w);