start of a thread safe queue

4 files changed, 154 insertions, 0 deletions

diff --git a/indra/newview/CMakeLists.txt b/indra/newview/CMakeLists.txt
index a9d1fd9064..36cfa615f0 100644
--- a/indra/newview/CMakeLists.txt
+++ b/indra/newview/CMakeLists.txt
@@ -283,6 +283,7 @@ set(viewer_SOURCE_FILES
     llloginhandler.cpp
     lllogininstance.cpp
     llmachineid.cpp
+    llmainlooprepeater.cpp
     llmanip.cpp
     llmaniprotate.cpp
     llmanipscale.cpp
@@ -815,6 +816,7 @@ set(viewer_HEADER_FILES
     llloginhandler.h
     lllogininstance.h
     llmachineid.h
+    llmainlooprepeater.h
     llmanip.h
     llmaniprotate.h
     llmanipscale.h
diff --git a/indra/newview/llappviewer.cpp b/indra/newview/llappviewer.cpp
index c0ec15f436..438f8668ae 100644
--- a/indra/newview/llappviewer.cpp
+++ b/indra/newview/llappviewer.cpp
@@ -197,6 +197,8 @@
 #include "llsecapi.h"
 #include "llmachineid.h"
 
+#include "llmainlooprepeater.h"
+
 // *FIX: These extern globals should be cleaned up.
 // The globals either represent state/config/resource-storage of either 
 // this app, or another 'component' of the viewer. App globals should be 
@@ -801,6 +803,9 @@ bool LLAppViewer::init()
 		return 1;
 	}
 	
+	// Initialize the repeater service.
+	LLMainLoopRepeater::getInstance()->start();
+	
 	//
 	// Initialize the window
 	//
diff --git a/indra/newview/llmainlooprepeater.cpp b/indra/newview/llmainlooprepeater.cpp
new file mode 100644
index 0000000000..c2eba97641
--- /dev/null
+++ b/indra/newview/llmainlooprepeater.cpp
@@ -0,0 +1,82 @@
+/** 
+ * @file llmachineid.cpp
+ * @brief retrieves unique machine ids
+ *
+ * $LicenseInfo:firstyear=2009&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "llviewerprecompiledheaders.h"
+#include "llapr.h"
+#include "llevents.h"
+#include "llmainlooprepeater.h"
+
+
+
+// LLMainLoopRepeater
+//-----------------------------------------------------------------------------
+
+
+LLMainLoopRepeater::LLMainLoopRepeater(void):
+	mQueue(gAPRPoolp, 1024)
+{
+	; // No op.
+}
+
+
+void LLMainLoopRepeater::start(void)
+{
+	mMainLoopConnection = LLEventPumps::instance().
+		obtain("mainloop").listen("stupid name here", boost::bind(&LLMainLoopRepeater::onMainLoop, this, _1));
+	mRepeaterConnection = LLEventPumps::instance().
+		obtain("mainlooprepeater").listen("other stupid name here", boost::bind(&LLMainLoopRepeater::onMessage, this, _1));
+}
+
+
+void LLMainLoopRepeater::stop(void)
+{
+	mMainLoopConnection.release();
+	mRepeaterConnection.release();
+}
+
+
+bool LLMainLoopRepeater::onMainLoop(LLSD const &)
+{
+	LLSD message;
+	while(mQueue.tryPopBack(message)) {
+		std::string pump = message["pump"].asString();
+		if(pump.length() == 0 ) continue; // No pump.
+		LLEventPumps::instance().obtain(pump).post(message["payload"]);
+	}
+	return false;
+}
+
+
+bool LLMainLoopRepeater::onMessage(LLSD const & event)
+{
+	try {
+		mQueue.pushFront(event);
+	} catch(LLThreadSafeQueueError & e) {
+		llwarns << "could not repeat message (" << e.what() << ")" << 
+			event.asString() << LL_ENDL;
+	}
+	return false;
+}
diff --git a/indra/newview/llmainlooprepeater.h b/indra/newview/llmainlooprepeater.h
new file mode 100644
index 0000000000..96b83b4916
--- /dev/null
+++ b/indra/newview/llmainlooprepeater.h
@@ -0,0 +1,65 @@
+/** 
+ * @file llmainlooprepeater.h
+ * @brief a service for repeating messages on the main loop.
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLMAINLOOPREPEATER_H
+#define LL_LLMAINLOOPREPEATER_H
+
+
+#include "llsd.h"
+#include "llthreadsafequeue.h"
+
+
+//
+// A service which creates the pump 'mainlooprepeater' to which any thread can
+// post a message that will be re-posted on the main loop.
+//
+// The posted message should contain two map elements: pump and payload.  The
+// pump value is a string naming the pump to which the message should be
+// re-posted.  The payload value is what will be posted to the designated pump.
+//
+class LLMainLoopRepeater:
+	public LLSingleton<LLMainLoopRepeater>
+{
+public:
+	LLMainLoopRepeater(void);
+	
+	// Start the repeater service.
+	void start(void);
+	
+	// Stop the repeater service.
+	void stop(void);
+	
+private:
+	LLTempBoundListener mMainLoopConnection;
+	LLTempBoundListener mRepeaterConnection;
+	LLThreadSafeQueue<LLSD> mQueue;
+	
+	bool onMainLoop(LLSD const &);
+	bool onMessage(LLSD const & event);
+};
+
+
+#endif