initial checkin

libs/task/examples/priority.cpp

@@ -0,0 +1,64 @@
+
+//          Copyright Oliver Kowalke 2009.
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE_1_0.txt or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
+
+#include <iostream>
+#include <cstdlib>
+#include <stdexcept>
+#include <string>
+
+#include <boost/bind.hpp>
+#include <boost/date_time/posix_time/posix_time.hpp>
+
+#include "boost/task.hpp"
+
+namespace pt = boost::posix_time;
+namespace tsk = boost::tasks;
+
+inline
+void print_fn( std::string const& msg)
+{ printf("%s", msg.c_str() ); }
+
+inline
+void long_running_fn()
+{ boost::this_thread::sleep( pt::milliseconds( 250) ); }
+
+int main( int argc, char *argv[])
+{
+	try
+	{
+		tsk::static_pool< tsk::unbounded_prio_queue< int > > pool( tsk::poolsize( 1) );
+
+		tsk::task< void > t1( long_running_fn);
+		tsk::task< void > t2( print_fn, "a text.\n");
+		tsk::task< void > t3( print_fn, " is ");
+		tsk::task< void > t4( print_fn, "This");
+
+		tsk::async(
+			boost::move( t1),
+			3,
+			pool);
+		tsk::async(
+			boost::move( t2),
+			0,
+			pool);
+		tsk::async(
+			boost::move( t3),
+			1,
+			pool);
+		tsk::async(
+			boost::move( t4),
+			2,
+			pool);
+
+		return EXIT_SUCCESS;
+	}
+	catch ( std::exception const& e)
+	{ std::cerr << "exception: " << e.what() << std::endl; }
+	catch ( ... )
+	{ std::cerr << "unhandled" << std::endl; }
+
+	return EXIT_FAILURE;
+}