From 8db65a15e220b33371b1d3c502a05bf308316db4 Mon Sep 17 00:00:00 2001
From: Sascha Volkenandt <sascha (at) akv-soft (dot) de>
Date: Thu, 4 Jan 2007 14:18:54 +0000
Subject: - added read lock objekt for channels

---
 pages/channels.ecpp | 26 +++++++++++++++++---------
 tools.h             | 15 +++++++++++++++
 2 files changed, 32 insertions(+), 9 deletions(-)

diff --git a/pages/channels.ecpp b/pages/channels.ecpp
index 5f64d1d..02fb4a3 100644
--- a/pages/channels.ecpp
+++ b/pages/channels.ecpp
@@ -3,6 +3,7 @@
 #include <vdr/plugin.h>
 #include <vdr/channels.h>
 #include "setup.h"
+#include "tools.h"
 
 using namespace vdrlive;
 
@@ -15,17 +16,24 @@ using namespace vdrlive;
 		<div id="inhalt">
 <{
 
-	for (cChannel *channel = Channels.First(); channel && channel->Number() <= LiveSetup().GetLastChannel(); channel = Channels.Next(channel)) {
-		if (!channel->GroupSep() && *channel->Name()) {
+	ReadLock channelsLock( Channels );
+	if (channelsLock) {
+		for (cChannel *channel = Channels.First(); channel && channel->Number() <= LiveSetup().GetLastChannel(); channel = Channels.Next(channel)) {
+			if (!channel->GroupSep() && *channel->Name()) {
 }>
-			<div class="channel">
-				<a href="schedule.html?channel=<$ channel->Number() $>"><$ channel->Name() $></a>
-			</div>
+				<div class="channel">
+					<a href="schedule.html?channel=<$ channel->Number() $>"><$ channel->Name() $></a>
+				</div>
 <{
-         }
-      }
-
-
+			 }
+		}
+	} else {
+}>
+	<div class="error">
+		Zugriff auf Kanäle temporär nicht möglich. Bitte später versuchen.
+	</div>
+<{
+	}
 }>
 		</div>
 	</body>
diff --git a/tools.h b/tools.h
index 4a01ca8..18f968d 100644
--- a/tools.h
+++ b/tools.h
@@ -3,11 +3,26 @@
 
 #include <ctime>
 #include <string>
+#include <vdr/thread.h>
 
 namespace vdrlive {
 
 std::string FormatDateTime( char const* format, time_t time );
 
+class ReadLock
+{
+public:
+	ReadLock( cRwLock& lock, int timeout = 100 ): m_lock( lock ), m_locked( false ) { if ( m_lock.Lock( false, timeout ) ) m_locked = true; }
+	~ReadLock() { if ( m_locked ) m_lock.Unlock(); }
+
+	operator bool() { return m_locked; }
+	bool operator!() { return !m_locked; }
+
+private:
+	cRwLock& m_lock;
+	bool m_locked;
+};
+
 } // namespace vdrlive
 
 #endif // VDR_LIVE_TOOLS_H
-- 
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