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028c011760
Since the returned object is now owned by the callee object, we can simply vend a ChildType&. This allows us to use "." instead of "->" at the call site, which is quite nice. :^)
125 lines
5.3 KiB
C++
125 lines
5.3 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 "MemoryStatsWidget.h"
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#include "GraphWidget.h"
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#include <AK/JsonObject.h>
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#include <LibCore/File.h>
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#include <LibGUI/BoxLayout.h>
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#include <LibGUI/Label.h>
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#include <LibGUI/Painter.h>
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#include <LibGfx/Font.h>
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#include <LibGfx/StylePainter.h>
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#include <stdio.h>
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#include <stdlib.h>
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static MemoryStatsWidget* s_the;
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MemoryStatsWidget* MemoryStatsWidget::the()
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{
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return s_the;
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}
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MemoryStatsWidget::MemoryStatsWidget(GraphWidget& graph)
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: m_graph(graph)
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{
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ASSERT(!s_the);
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s_the = this;
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set_size_policy(GUI::SizePolicy::Fill, GUI::SizePolicy::Fixed);
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set_preferred_size(0, 72);
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set_layout<GUI::VerticalBoxLayout>();
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layout()->set_margins({ 0, 8, 0, 0 });
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layout()->set_spacing(3);
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auto build_widgets_for_label = [this](const String& description) -> RefPtr<GUI::Label> {
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auto& container = add<GUI::Widget>();
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container.set_layout<GUI::HorizontalBoxLayout>();
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container.set_size_policy(GUI::SizePolicy::Fixed, GUI::SizePolicy::Fixed);
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container.set_preferred_size(275, 12);
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auto& description_label = container.add<GUI::Label>(description);
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description_label.set_font(Gfx::Font::default_bold_font());
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description_label.set_text_alignment(Gfx::TextAlignment::CenterLeft);
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auto& label = container.add<GUI::Label>();
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label.set_text_alignment(Gfx::TextAlignment::CenterRight);
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return label;
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};
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m_user_physical_pages_label = build_widgets_for_label("Userspace physical:");
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m_supervisor_physical_pages_label = build_widgets_for_label("Supervisor physical:");
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m_kmalloc_label = build_widgets_for_label("Kernel heap:");
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m_kmalloc_count_label = build_widgets_for_label("Calls kmalloc/kfree:");
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refresh();
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}
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MemoryStatsWidget::~MemoryStatsWidget()
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{
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}
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static inline size_t page_count_to_kb(size_t kb)
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{
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return (kb * 4096) / 1024;
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}
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static inline size_t bytes_to_kb(size_t bytes)
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{
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return bytes / 1024;
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}
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void MemoryStatsWidget::refresh()
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{
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auto proc_memstat = Core::File::construct("/proc/memstat");
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if (!proc_memstat->open(Core::IODevice::OpenMode::ReadOnly))
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ASSERT_NOT_REACHED();
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auto file_contents = proc_memstat->read_all();
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auto json = JsonValue::from_string(file_contents).as_object();
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unsigned kmalloc_eternal_allocated = json.get("kmalloc_eternal_allocated").to_u32();
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(void)kmalloc_eternal_allocated;
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unsigned kmalloc_allocated = json.get("kmalloc_allocated").to_u32();
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unsigned kmalloc_available = json.get("kmalloc_available").to_u32();
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unsigned user_physical_allocated = json.get("user_physical_allocated").to_u32();
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unsigned user_physical_available = json.get("user_physical_available").to_u32();
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unsigned super_physical_alloc = json.get("super_physical_allocated").to_u32();
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unsigned super_physical_free = json.get("super_physical_available").to_u32();
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unsigned kmalloc_call_count = json.get("kmalloc_call_count").to_u32();
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unsigned kfree_call_count = json.get("kfree_call_count").to_u32();
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size_t kmalloc_sum_available = kmalloc_allocated + kmalloc_available;
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size_t user_pages_available = user_physical_allocated + user_physical_available;
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size_t supervisor_pages_available = super_physical_alloc + super_physical_free;
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m_kmalloc_label->set_text(String::format("%uK/%uK", bytes_to_kb(kmalloc_allocated), bytes_to_kb(kmalloc_sum_available)));
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m_user_physical_pages_label->set_text(String::format("%uK/%uK", page_count_to_kb(user_physical_allocated), page_count_to_kb(user_pages_available)));
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m_supervisor_physical_pages_label->set_text(String::format("%uK/%uK", page_count_to_kb(super_physical_alloc), page_count_to_kb(supervisor_pages_available)));
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m_kmalloc_count_label->set_text(String::format("%u/%u (+%u)", kmalloc_call_count, kfree_call_count, kmalloc_call_count - kfree_call_count));
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m_graph.set_max(page_count_to_kb(user_pages_available));
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m_graph.add_value(page_count_to_kb(user_physical_allocated));
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}
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