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<a name="PolyORB-Tasking-runtimes"></a>
<div class="header">
<p>
Next: <a href="PolyORB-ORB-Tasking-policies.html#PolyORB-ORB-Tasking-policies" accesskey="n" rel="next">PolyORB ORB Tasking policies</a>, Up: <a href="Tasking-model-in-PolyORB.html#Tasking-model-in-PolyORB" accesskey="u" rel="up">Tasking model in PolyORB</a> [<a href="About-This-Guide.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="PolyORB-Tasking-runtimes-1"></a>
<h3 class="section">5.1 PolyORB Tasking runtimes</h3>
<a name="index-Tasking-runtime"></a>
<p>PolyORB may use any of three different tasking runtimes to manage and
synchronize tasks, if any. Tasking runtime capabilities are defined
in the Ada Reference Manual <cite>[ISO06]</cite>.
</p>
<p>The choice of a specific tasking runtime is a compile-time parameter,
<a href="Tasking-runtimes.html#Tasking-runtimes">Tasking runtimes</a> for more details on their configuration.
</p>
<a name="Full-tasking-runtime"></a>
<h4 class="subsection">5.1.1 Full tasking runtime</h4>
<p>Full tasking runtime refers to the configuration in which there are
dependencies on the tasking constructs defined in chapter 9 of
<cite>[ISO06]</cite>. It makes use of all capabilities defined in this section
to manage and synchronize tasks.
</p>
<p>In this configuration, a PolyORB application must be compiled and
linked with a tasking-capable Ada runtime.
</p>
<a name="No-tasking-runtime"></a>
<h4 class="subsection">5.1.2 No tasking runtime</h4>
<p>No tasking runtime refers to the configuration in which there is no
dependency on tasking constructs. Thus, no tasking is required.
</p>
<p>In this configuration, a PolyORB application may be compiled and
linked with a tasking-capable Ada runtime or a no-tasking Ada runtime.
</p>
<a name="Ravenscar-tasking-runtime"></a>
<h4 class="subsection">5.1.3 Ravenscar tasking runtime</h4>
<a name="index-Ravenscar-1"></a>
<p>Ravenscar tasking runtime refers to the configuration in which tasking
constructs are compliant with the <em>Ravenscar tasking restricted
profile</em>.
</p>
<p>In this configuration, a PolyORB application may be compiled and
linked with a tasking-capable Ada runtime or a Ravenscar Ada runtime.
</p>
<p>To configure tasking constructs used by PolyORB, one must instantiate
the <code>PolyORB.Setup.Tasking.Ravenscar</code> generic package shown below
to set up tasks and protected objects used by PolyORB core.
</p>
<div class="smallexample">
<pre class="smallexample">
------------------------------------------------------------------------------
-- --
-- POLYORB COMPONENTS --
-- --
-- P O L Y O R B . S E T U P . T A S K I N G . R A V E N S C A R --
-- --
-- S p e c --
-- --
-- Copyright (C) 2002-2012, Free Software Foundation, Inc. --
-- --
-- This is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. This software is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
-- TABILITY 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 and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- PolyORB is maintained by AdaCore --
-- (email: sales@adacore.com) --
-- --
------------------------------------------------------------------------------
-- You should instantiate this package to set up a ravenscar profile.
<b>with</b> System;
<b>with</b> PolyORB.Tasking.Profiles.Ravenscar.Threads.Annotations;
<b>with</b> PolyORB.Tasking.Profiles.Ravenscar.Threads;
<b>with</b> PolyORB.Tasking.Profiles.Ravenscar.Mutexes;
<b>with</b> PolyORB.Tasking.Profiles.Ravenscar.Condition_Variables;
<b>generic</b>
Number_Of_Application_Tasks : Integer;
-- Number of tasks created by the user.
Number_Of_System_Tasks : Integer;
-- Number of tasks created by the PolyORB run-time library.
Number_Of_Conditions : Integer;
-- Number of preallocated conditions.
Number_Of_Mutexes : Integer;
-- Number of preallocated mutexes.
Task_Priority : System.Priority;
-- Priority of the tasks of the pool.
Storage_Size : Natural;
-- Stack size of the system tasks.
<b>package</b> PolyORB.Setup.Tasking.Ravenscar <b>is</b>
<b>package</b> Threads_Package <b>is</b>
<b>new</b> PolyORB.Tasking.Profiles.Ravenscar.Threads
(Number_Of_Application_Tasks,
Number_Of_System_Tasks,
Task_Priority,
Storage_Size);
<b>package</b> Thread_Annotations_Package <b>is</b> <b>new</b> Threads_Package.Annotations;
<b>package</b> Conditions_Package <b>is</b>
<b>new</b> PolyORB.Tasking.Profiles.Ravenscar.Condition_Variables
(Threads_Package,
Number_Of_Conditions);
<b>package</b> Mutexes_Package <b>is</b>
<b>new</b> PolyORB.Tasking.Profiles.Ravenscar.Mutexes
(Threads_Package,
Number_Of_Mutexes);
<b>end</b> PolyORB.Setup.Tasking.Ravenscar;
</pre></div>
<hr>
<div class="header">
<p>
Next: <a href="PolyORB-ORB-Tasking-policies.html#PolyORB-ORB-Tasking-policies" accesskey="n" rel="next">PolyORB ORB Tasking policies</a>, Up: <a href="Tasking-model-in-PolyORB.html#Tasking-model-in-PolyORB" accesskey="u" rel="up">Tasking model in PolyORB</a> [<a href="About-This-Guide.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
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