L4Re - L4 Runtime Environment
cap
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1 // -*- Mode: C++ -*-
2 // vim:ft=cpp
3 /**
4  * \file cap
5  * \brief Capability utility functions
6  */
7 /*
8  * (c) 2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>
9  * economic rights: Technische Universit├Ąt Dresden (Germany)
10  *
11  * This file is part of TUD:OS and distributed under the terms of the
12  * GNU General Public License 2.
13  * Please see the COPYING-GPL-2 file for details.
14  *
15  * As a special exception, you may use this file as part of a free software
16  * library without restriction. Specifically, if other files instantiate
17  * templates or use macros or inline functions from this file, or you compile
18  * this file and link it with other files to produce an executable, this
19  * file does not by itself cause the resulting executable to be covered by
20  * the GNU General Public License. This exception does not however
21  * invalidate any other reasons why the executable file might be covered by
22  * the GNU General Public License.
23  */
24 
25 #pragma once
26 
27 #include <l4/sys/task>
28 
29 namespace L4Re { namespace Util {
30 
31 /**
32  * \brief Release a capability from a task (unmap).
33  * \ingroup api_l4re_util
34  *
35  * Note that the given capability does not need to be handled by the
36  * capability allocator in any way.
37  */
38 L4_CV static inline l4_msgtag_t cap_release(L4::Cap<void> cap)
39 {
40  return l4_task_unmap(L4_BASE_TASK_CAP,
41  l4_obj_fpage(cap.cap(), 0, L4_FPAGE_RWX),
42  L4_FP_ALL_SPACES);
43 }
44 
45 }}