Trim some redundant and a bit of misleading text:

1. The values of #define'd constants are part of the ABI, but not of the API.
Programmers need not worry about them and must not rely on them.
Consequently, do not list these values in the SYNOPSIS.
2. libevent can be used for any event loop, not only for the main loop
of a program.
3. No need to state numbers of arguments, they are obvious from the SYNOPSIS.
4. If a function is documented to require a pointer to a specific kind of
object as an argument, there is no need to say passing NULL is undefined.
OK jmc@ and Ted Bullock

diff --git a/lib/libevent/event_base_loop.3 b/lib/libevent/event_base_loop.3
index 5ce6b81..8bc5754 100644 (file)
--- a/lib/libevent/event_base_loop.3
+++ b/lib/libevent/event_base_loop.3
@@ -1,4 +1,4 @@
-.\" $OpenBSD: event_base_loop.3,v 1.1 2023/04/08 16:21:22 schwarze Exp $
+.\" $OpenBSD: event_base_loop.3,v 1.2 2023/04/09 14:43:51 schwarze Exp $
 .\" Copyright (c) 2023 Ted Bullock <tbullock@comlore.com>
 .\"
 .\" Permission to use, copy, modify, and distribute this software for any
@@ -13,7 +13,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: April 8 2023 $
+.Dd $Mdocdate: April 9 2023 $
 .Dt EVENT_BASE_LOOP 3
 .Os
 .Sh NAME
@@ -32,8 +32,6 @@
 .Fn event_base_dispatch "struct event_base *base"
 .Ft int
 .Fn event_dispatch void
-.Fd #define EVLOOP_ONCE                0x01
-.Fd #define EVLOOP_NONBLOCK    0x02
 .Sh DESCRIPTION
 An event loop waits for and dispatches events in a program.
 This enables asynchronous programming, allowing a program to perform other
@@ -46,8 +44,7 @@ with each event as they occur.
 .Pp
 The
 .Fn event_base_loop
-family of functions start an event loop that replaces the main loop of a
-program.
+family of functions run an event loop.
 By default, they return when there are no more scheduled events.
 .Pp
 There are three types of events these functions monitor including signal,
@@ -81,8 +78,7 @@ events are resolved, some of these such as signals, may persist and become
 events again.
 .El
 .Pp
-.Fn event_base_loop
-starts an event loop, it takes two arguments:
+The arguments are as follows:
 .Bl -tag -width 6n
 .It Fa base :
 A pointer to an
@@ -91,10 +87,6 @@ structure returned from
 .Xr event_init 3
 or
 .Xr event_base_new 3 .
-The behavior is undefined if
-.Fa base
-is
-.Dv NULL .
 .It Fa flags :
 A set of flags that modify the behavior of the event loop.
 The following flags are available:
@@ -119,10 +111,6 @@ is a version of
 .Fn event_base_loop
 that requires the library to be initialized by
 .Xr event_init 3 .
-The function has one argument,
-.Fa flags ,
-with the same attributes as
-.Fn event_base_loop .
 .Pp
 .Fn event_base_dispatch
 is equivalent to calling