439315d918
Without the patch the signal cap was ever transferred to the timer session when a usleep/msleep was called, even when unneeded. On base-nova this causes the allocation of new capability indexes which are not freed up. So the timer service run quickly out of indexes and get out of order... Related to issue #1
81 lines
1.9 KiB
C++
81 lines
1.9 KiB
C++
/*
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* \brief Connection to timer service
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* \author Norman Feske
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* \date 2008-08-22
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*/
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/*
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* Copyright (C) 2008-2013 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__TIMER_SESSION__CONNECTION_H_
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#define _INCLUDE__TIMER_SESSION__CONNECTION_H_
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#include <timer_session/client.h>
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#include <base/connection.h>
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namespace Timer {
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class Connection : public Genode::Connection<Session>, public Session_client
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{
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private:
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Lock _lock;
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Signal_receiver _sig_rec;
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Signal_context _default_sigh_ctx;
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Signal_context_capability _default_sigh_cap;
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Signal_context_capability _custom_sigh_cap;
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public:
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Connection()
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:
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Genode::Connection<Session>(session("ram_quota=8K")),
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Session_client(cap()),
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_default_sigh_cap(_sig_rec.manage(&_default_sigh_ctx))
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{
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/* register default signal handler */
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Session_client::sigh(_default_sigh_cap);
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}
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~Connection() { _sig_rec.dissolve(&_default_sigh_ctx); }
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/*
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* Intercept 'sigh' to keep track of customized signal handlers
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*/
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void sigh(Signal_context_capability sigh)
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{
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_custom_sigh_cap = sigh;
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Session_client::sigh(_custom_sigh_cap);
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}
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void usleep(unsigned us)
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{
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/* serialize sleep calls issued by different threads */
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Lock::Guard guard(_lock);
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/* temporarily install to the default signal handler */
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if (_custom_sigh_cap.valid())
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Session_client::sigh(_default_sigh_cap);
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/* trigger timeout at default signal handler */
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trigger_once(us);
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_sig_rec.wait_for_signal();
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/* revert custom signal handler if registered */
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if (_custom_sigh_cap.valid())
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Session_client::sigh(_custom_sigh_cap);
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}
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void msleep(unsigned ms)
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{
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usleep(1000*ms);
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}
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};
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}
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#endif /* _INCLUDE__TIMER_SESSION__CONNECTION_H_ */
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