de0a771fae
The old implementation of sleep_forever() used a local Ipc_server object, which is not announced (i.e., known) outside of the blocking process/thread, to infinitely wait for incoming messages. In past and present, this leads to problems (e.g., issues #538 and #1032). Fixes #1135. Fixes #538. Fixes #1032.
57 lines
995 B
C++
57 lines
995 B
C++
/*
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* \brief Basic locking primitive
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* \author Norman Feske
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* \date 2006-07-26
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*/
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/*
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* Copyright (C) 2006-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _INCLUDE__BASE__CANCELABLE_LOCK_H_
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#define _INCLUDE__BASE__CANCELABLE_LOCK_H_
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#include <base/lock_guard.h>
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#include <base/blocking.h>
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namespace Genode {
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class Cancelable_lock
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{
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private:
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int volatile _lock;
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public:
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enum State { LOCKED, UNLOCKED };
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/**
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* Constructor
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*/
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explicit Cancelable_lock(State initial = UNLOCKED);
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/**
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* Try to aquire lock an block while lock is not free
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*
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* This function may throw a Genode::Blocking_canceled exception.
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*/
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void lock();
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/**
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* Release lock
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*/
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void unlock();
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/**
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* Lock guard
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*/
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typedef Genode::Lock_guard<Cancelable_lock> Guard;
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};
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}
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#endif /* _INCLUDE__BASE__CANCELABLE_LOCK_H_ */
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