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+/* vim: set sw=4 sts=4 et foldmethod=syntax : */
+
+/*
+ * Copyright (c) 2007 Ciaran McCreesh <ciaran.mccreesh@blueyonder.co.uk>
+ *
+ * This file is part of the Paludis package manager. Paludis is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU General
+ * Public License version 2, as published by the Free Software Foundation.
+ *
+ * Paludis 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 General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef PALUDIS_GUARD_PALUDIS_UTIL_IDLE_ACTION_POOL_HH
+#define PALUDIS_GUARD_PALUDIS_UTIL_IDLE_ACTION_POOL_HH 1
+
+#include <paludis/util/idle_action_pool-fwd.hh>
+#include <paludis/util/private_implementation_pattern.hh>
+#include <paludis/util/instantiation_policy.hh>
+#include <paludis/util/tr1_functional.hh>
+
+namespace paludis
+{
+ /**
+ * An IdleActionPool is an ActionQueue holding actions that can be executed
+ * if there is idle CPU time available.
+ *
+ * \ingroup g_threads
+ * \since 0.26
+ * \nosubgrouping
+ */
+ class PALUDIS_VISIBLE IdleActionPool :
+ public InstantiationPolicy<IdleActionPool, instantiation_method::SingletonTag>,
+ private PrivateImplementationPattern<IdleActionPool>
+ {
+ friend class InstantiationPolicy<IdleActionPool, instantiation_method::SingletonTag>;
+
+ private:
+ IdleActionPool();
+ ~IdleActionPool();
+
+ void _count_result(const tr1::function<IdleActionResult () throw ()> &);
+
+ public:
+ /**
+ * The specified function must be executed at some point, but it
+ * doesn't matter when.
+ */
+ void required_idle_action(const tr1::function<IdleActionResult () throw ()> &);
+
+ /**
+ * The specified function can be executed at some point.
+ */
+ void optional_idle_action(const tr1::function<IdleActionResult () throw ()> &);
+
+ /**
+ * Increment the 'unused' stat.
+ */
+ void increase_used_stat();
+
+ /**
+ * Increment the 'unprepared' stat.
+ */
+ void increase_unprepared_stat();
+ };
+}
+
+#endif