62 lines
1.3 KiB
C++
62 lines
1.3 KiB
C++
/*
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* \brief Access to the component's LOG session
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* \author Norman Feske
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* \date 2016-05-03
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*/
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/*
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* Copyright (C) 2016-2017 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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/* Genode includes */
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#include <base/log.h>
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#include <log_session/log_session.h>
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#include <base/buffered_output.h>
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/* base-internal includes */
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#include <base/internal/globals.h>
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#include <base/internal/unmanaged_singleton.h>
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using namespace Genode;
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static Log *log_ptr;
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Log &Log::log()
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{
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/*
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* Ensure the log is initialized before use. This is only needed for
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* components that do not initialize the log explicitly in the startup
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* code, i.e., Linux hybrid components.
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*/
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Genode::init_log();
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return *log_ptr;
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}
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extern "C" int stdout_write(const char *s);
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void Genode::init_log()
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{
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/* ignore subsequent calls */
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if (log_ptr)
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return;
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struct Write_fn { void operator () (char const *s) { stdout_write(s); } };
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typedef Buffered_output<Log_session::MAX_STRING_LEN, Write_fn>
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Buffered_log_output;
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static Buffered_log_output *buffered_log_output =
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unmanaged_singleton<Buffered_log_output>(Write_fn());
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log_ptr = unmanaged_singleton<Log>(*buffered_log_output);
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}
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