minor kqueue optimisation

[software/libev.git] / ev.h

diff --git a/ev.h b/ev.h
index 3f009181d0bfc0ad8100a181197cac94518c8092..8fa7af357fcfbc42e0e37c0564bec344e3625a1c 100644 (file)
--- a/ev.h
+++ b/ev.h
@@ -71,18 +71,18 @@ struct ev_loop;
 #endif
 
 /* eventmask, revents, events... */
-#define EV_UNDEF          -1 /* guaranteed to be invalid */
-#define EV_NONE         0x00
-#define EV_READ         0x01 /* io only */
-#define EV_WRITE        0x02 /* io only */
-#define EV_TIMEOUT  0x000100 /* timer only */
-#define EV_PERIODIC 0x000200 /* periodic timer only */
-#define EV_SIGNAL   0x000400 /* signal only */
-#define EV_IDLE     0x000800 /* idle only */
-#define EV_CHECK    0x001000 /* check only */
-#define EV_PREPARE  0x002000 /* prepare only */
-#define EV_CHILD    0x004000 /* child/pid only */
-#define EV_ERROR    0x800000 /* sent when an error occurs */
+#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_ERROR    0x800000L /* sent when an error occurs */
 
 /* can be used to add custom fields to all watchers, while losing binary compatibility */
 #ifndef EV_COMMON
@@ -203,7 +203,7 @@ struct ev_check
   EV_WATCHER (ev_check)
 };
 
-/* invoked when sigchld is received and waitpid indicates the givne pid */
+/* invoked when sigchld is received and waitpid indicates the given pid */
 /* revent EV_CHILD */
 /* does not support priorities */
 struct ev_child
@@ -231,20 +231,26 @@ union ev_any_watcher
   struct ev_child child;
 };
 
-#define EVMETHOD_AUTO     0 /* consults environment */
-#define EVMETHOD_SELECT   1
-#define EVMETHOD_POLL     2
-#define EVMETHOD_EPOLL    4
-#define EVMETHOD_KQUEUE   8
-#define EVMETHOD_DEVPOLL 16 /* NYI */
-#define EVMETHOD_PORT    32 /* NYI */
-#define EVMETHOD_WIN32   64 /* NYI */
-#define EVMETHOD_ANY     ~0 /* any method, do not consult env */
+/* bits for ev_default_loop and ev_loop_new */
+/* the default */
+#define EVFLAG_AUTO       0x00000000UL /* not quite a mask */
+/* flag bits */
+#define EVFLAG_NOENV      0x01000000UL /* do NOT consult environment */
+/* method bits to be ored together */
+#define EVBACKEND_SELECT  0x00000001UL /* about anywhere */
+#define EVBACKEND_POLL    0x00000002UL /* !win */
+#define EVBACKEND_EPOLL   0x00000004UL /* linux */
+#define EVBACKEND_KQUEUE  0x00000008UL /* bsd */
+#define EVBACKEND_DEVPOLL 0x00000010UL /* solaris 8 */ /* NYI */
+#define EVBACKEND_PORT    0x00000020UL /* solaris 10 */
 
 #if EV_PROTOTYPES
 int ev_version_major (void);
 int ev_version_minor (void);
 
+unsigned int ev_supported_backends (void);
+unsigned int ev_recommended_backends (void);
+
 ev_tstamp ev_time (void);
 
 /* Sets the allocation function to use, works like realloc.
@@ -264,10 +270,20 @@ void ev_set_syserr_cb (void (*cb)(const char *msg));
 # if EV_MULTIPLICITY
 /* the default loop is the only one that handles signals and child watchers */
 /* you can call this as often as you like */
-struct ev_loop *ev_default_loop (int methods); /* returns default loop */
+static struct ev_loop *
+ev_default_loop (unsigned int flags)
+{
+  extern struct ev_loop *ev_default_loop_ptr;
+  extern struct ev_loop *ev_default_loop_init (unsigned int flags);
+
+  if (!ev_default_loop_ptr)
+    ev_default_loop_init (flags);
+
+  return ev_default_loop_ptr;
+}
 
 /* create and destroy alternative loops that don't handle signals */
-struct ev_loop *ev_loop_new (int methods);
+struct ev_loop *ev_loop_new (unsigned int flags);
 void ev_loop_destroy (EV_P);
 void ev_loop_fork (EV_P);
 
@@ -275,7 +291,7 @@ ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after
 
 # else
 
-int ev_default_loop (int methods); /* returns true when successful */
+int ev_default_loop (unsigned int flags); /* returns true when successful */
 
 static ev_tstamp
 ev_now (void)
@@ -293,12 +309,12 @@ void ev_default_destroy (void); /* destroy the default loop */
 /* you can actually call it at any time, anywhere :) */
 void ev_default_fork (void);
 
-int ev_method (EV_P);
+unsigned int ev_backend (EV_P);
 #endif
 
 #define EVLOOP_NONBLOCK        1 /* do not block/wait */
 #define EVLOOP_ONESHOT 2 /* block *once* only */
-#define EVUNLOOP_ONCE   1 /* unloop once */
+#define EVUNLOOP_ONE    1 /* unloop once */
 #define EVUNLOOP_ALL    2 /* unloop all loops */
 
 #if EV_PROTOTYPES