Fixed async wait to handle zero timeouts (by async-wait patch)

brltty-5.3.1-async-wait.patch

@@ -0,0 +1,26 @@
+diff --git a/Programs/async_wait.c b/Programs/async_wait.c
+index 231a07c..71b1372 100644
+--- a/Programs/async_wait.c
++++ b/Programs/async_wait.c
+@@ -142,13 +142,20 @@ awaitAction (long int timeout) {
+ 
+ int
+ asyncAwaitCondition (int timeout, AsyncConditionTester *testCondition, void *data) {
++  int first = 1;
+   TimePeriod period;
+   startTimePeriod(&period, timeout);
+ 
+   while (!(testCondition && testCondition(data))) {
+     long int elapsed;
+ 
+-    if (afterTimePeriod(&period, &elapsed)) return 0;
++    if (first) {
++      first = 0;
++      elapsed = 0;
++    } else if (afterTimePeriod(&period, &elapsed)) {
++      return 0;
++    }
++
+     awaitAction(timeout - elapsed);
+   }
+ 

brltty.spec

@@ -22,7 +22,7 @@
 
 Name: brltty
 Version: %{pkg_version}
-Release: 7%{?dist}
+Release: 8%{?dist}
 License: GPLv2+
 Group: System Environment/Daemons
 URL: http://mielke.cc/brltty/
@@ -32,6 +32,8 @@ Patch1: brltty-loadLibrary.patch
 # libspeechd.h moved in latest speech-dispatch (NOT sent upstream)
 Patch2: brltty-5.0-libspeechd.patch
 Patch3: brltty-5.3-xw-fonts-fix.patch
+# patch provided by upstream
+Patch4: brltty-5.3.1-async-wait.patch
 Summary: Braille display driver for Linux/Unix
 BuildRequires: byacc, glibc-kernheaders, bluez-libs-devel, systemd
 BuildRequires: gettext, at-spi2-core-devel, espeak-devel
@@ -199,6 +201,7 @@ This package provides the OCaml binding for BrlAPI.
 %patch1 -p1 -b .loadLibrary
 %patch2 -p1 -b .libspeechd
 %patch3 -p1 -b .xw-fonts-fix
+%patch4 -p1 -b .async-wait
 
 %if 0%{?with_python3}
 # Make a copy of the source tree for building the Python 3 module
@@ -416,6 +419,9 @@ fi
 %endif
 
 %changelog
+* Fri May 13 2016 Jaroslav Škarvada <jskarvad@redhat.com> - 5.3.1-8
+- Fixed async wait to handle zero timeouts (by async-wait patch)
+
 * Wed May  4 2016 Jaroslav Škarvada <jskarvad@redhat.com> - 5.3.1-7
 - Made brltty-config executable, currently useless, but FHS compliant
   Resolves: rhbz#1332981