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85 lines
2.7 KiB
C++
85 lines
2.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <Kernel/Devices/Device.h>
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#include <Kernel/FileSystem/InodeMetadata.h>
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#include <LibC/errno_numbers.h>
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namespace Kernel {
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static HashMap<u32, Device*>* s_all_devices;
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HashMap<u32, Device*>& Device::all_devices()
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{
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if (s_all_devices == nullptr)
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s_all_devices = new HashMap<u32, Device*>;
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return *s_all_devices;
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}
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void Device::for_each(Function<void(Device&)> callback)
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{
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for (auto& entry : all_devices())
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callback(*entry.value);
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}
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Device* Device::get_device(unsigned major, unsigned minor)
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{
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auto it = all_devices().find(encoded_device(major, minor));
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if (it == all_devices().end())
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return nullptr;
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return it->value;
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}
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Device::Device(unsigned major, unsigned minor)
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: m_major(major)
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, m_minor(minor)
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{
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u32 device_id = encoded_device(major, minor);
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auto it = all_devices().find(device_id);
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if (it != all_devices().end()) {
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dbg() << "Already registered " << major << "," << minor << ": " << it->value->class_name();
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}
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ASSERT(!all_devices().contains(device_id));
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all_devices().set(device_id, this);
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}
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Device::~Device()
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{
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all_devices().remove(encoded_device(m_major, m_minor));
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}
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String Device::absolute_path() const
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{
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return String::format("device:%u,%u (%s)", m_major, m_minor, class_name());
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}
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String Device::absolute_path(const FileDescription&) const
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{
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return absolute_path();
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}
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}
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