From 2992b894e04df8c84a5cccb803566ebd5bafb91d Mon Sep 17 00:00:00 2001
From: NIIBE Yutaka <gniibe@fsij.org>
Date: Fri, 9 Nov 2018 16:04:17 +0900
Subject: [PATCH] Add eventflag_wait_all.

---
 ChangeLog   |  4 ++++
 eventflag.c | 13 ++++++++++++-
 eventflag.h |  1 +
 3 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 71338e3..26dfcf9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2018-11-09  NIIBE Yutaka  <gniibe@fsij.org>
+
+	* eventflag.c (eventflag_wait_all): New.
+
 2018-10-02  NIIBE Yutaka  <gniibe@fsij.org>
 
 	* VERSION: 1.11.
diff --git a/eventflag.c b/eventflag.c
index c6a871e..2691713 100644
--- a/eventflag.c
+++ b/eventflag.c
@@ -1,7 +1,7 @@
 /*
  * eventflag.c - Eventflag
  *
- * Copyright (C) 2013, 2016  Flying Stone Technology
+ * Copyright (C) 2013, 2016, 2018  Flying Stone Technology
  * Author: NIIBE Yutaka <gniibe@fsij.org>
  *
  * This file is a part of Chopstx, a thread library for embedded.
@@ -107,6 +107,17 @@ eventflag_wait (struct eventflag *ev)
 }
 
 
+void
+eventflag_wait_all (struct eventflag *ev, eventmask_t m)
+{
+  chopstx_mutex_lock (&ev->mutex);
+  while ((ev->flags & m) != m)
+    chopstx_cond_wait (&ev->cond, &ev->mutex);
+  ev->flags &= ~m;
+  chopstx_mutex_unlock (&ev->mutex);
+}
+
+
 eventmask_t
 eventflag_wait_timeout (struct eventflag *ev, uint32_t usec)
 {
diff --git a/eventflag.h b/eventflag.h
index 35beb43..f1bc074 100644
--- a/eventflag.h
+++ b/eventflag.h
@@ -8,6 +8,7 @@ struct eventflag {
 
 void eventflag_init (struct eventflag *ev);
 eventmask_t eventflag_wait (struct eventflag *ev);
+void eventflag_wait_all (struct eventflag *ev, eventmask_t m);
 eventmask_t eventflag_wait_timeout (struct eventflag *ev, uint32_t usec);
 void eventflag_signal (struct eventflag *ev, eventmask_t m);