74 lines
1.9 KiB
C++
74 lines
1.9 KiB
C++
/*
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* \brief Connection to TRACE service
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* \author Norman Feske
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* \date 2013-08-11
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*/
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/*
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* Copyright (C) 2013-2017 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 Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__TRACE_SESSION__CONNECTION_H_
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#define _INCLUDE__TRACE_SESSION__CONNECTION_H_
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#include <util/retry.h>
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#include <trace_session/client.h>
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#include <base/connection.h>
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namespace Genode { namespace Trace { struct Connection; } }
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struct Genode::Trace::Connection : Genode::Connection<Genode::Trace::Session>,
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Genode::Trace::Session_client
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{
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template <typename FUNC>
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auto _retry(FUNC func) -> decltype(func())
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{
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return retry_with_upgrade(Ram_quota{8*1024}, Cap_quota{2}, func);
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}
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/**
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* Constructor
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*
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* \param ram_quota RAM donated for tracing purposes
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* \param arg_buffer_size session argument-buffer size
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* \param parent_levels number of parent levels to trace
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*/
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Connection(Env &env, size_t ram_quota, size_t arg_buffer_size, unsigned parent_levels)
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:
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Genode::Connection<Session>(env,
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session(env.parent(), "ram_quota=%lu, arg_buffer_size=%lu, parent_levels=%u",
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ram_quota + 10*1024, arg_buffer_size, parent_levels)),
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Session_client(env.rm(), cap())
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{ }
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Policy_id alloc_policy(size_t size) override
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{
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return _retry([&] () {
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return Session_client::alloc_policy(size); });
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}
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void trace(Subject_id s, Policy_id p, size_t buffer_size) override
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{
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_retry([&] () { Session_client::trace(s, p, buffer_size); });
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}
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size_t subjects(Subject_id *dst, size_t dst_len) override
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{
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return _retry([&] () {
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return Session_client::subjects(dst, dst_len); });
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}
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template <typename FN>
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size_t for_each_subject_info(FN const &fn)
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{
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return _retry([&] () {
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return Session_client::for_each_subject_info(fn); });
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}
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};
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#endif /* _INCLUDE__TRACE_SESSION__CONNECTION_H_ */
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