mirror of
https://github.com/RGBCube/serenity
synced 2025-05-28 13:15:09 +00:00
101 lines
3.3 KiB
C++
101 lines
3.3 KiB
C++
#include "MemoryStatsWidget.h"
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#include <SharedGraphics/Painter.h>
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#include <LibGUI/GBoxLayout.h>
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#include <LibGUI/GLabel.h>
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#include <LibGUI/GStyle.h>
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#include <stdio.h>
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#include <stdlib.h>
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MemoryStatsWidget::MemoryStatsWidget(GWidget* parent)
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: GWidget(parent)
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{
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set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
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set_preferred_size({ 0, 60 });
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set_layout(make<GBoxLayout>(Orientation::Vertical));
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layout()->set_margins({ 0, 8, 0, 0 });
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layout()->set_spacing(3);
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m_user_physical_pages_label = new GLabel(this);
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m_user_physical_pages_label->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
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m_user_physical_pages_label->set_preferred_size({ 0, 12 });
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m_user_physical_pages_label->set_fill_with_background_color(false);
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m_supervisor_physical_pages_label = new GLabel(this);
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m_supervisor_physical_pages_label->set_fill_with_background_color(false);
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m_supervisor_physical_pages_label->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
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m_supervisor_physical_pages_label->set_preferred_size({ 0, 12 });
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m_kmalloc_label = new GLabel(this);
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m_kmalloc_label->set_fill_with_background_color(false);
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m_kmalloc_label->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
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m_kmalloc_label->set_preferred_size({ 0, 12 });
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start_timer(1000);
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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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FILE* fp = fopen("/proc/memstat", "r");
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if (!fp) {
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perror("failed to open /proc/memstat");
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exit(1);
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}
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for (;;) {
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char buf[BUFSIZ];
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char* ptr = fgets(buf, sizeof(buf), fp);
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if (!ptr)
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break;
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auto parts = String(buf, Chomp).split(',');
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if (parts.size() < 7)
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break;
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bool ok;
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unsigned kmalloc_sum_eternal = parts[0].to_uint(ok);
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ASSERT(ok);
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unsigned kmalloc_sum_alloc = parts[1].to_uint(ok);
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ASSERT(ok);
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unsigned kmalloc_sum_free = parts[2].to_uint(ok);
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ASSERT(ok);
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unsigned user_pages_alloc = parts[3].to_uint(ok);
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ASSERT(ok);
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unsigned user_pages_free = parts[4].to_uint(ok);
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ASSERT(ok);
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unsigned supervisor_pages_alloc = parts[5].to_uint(ok);
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ASSERT(ok);
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unsigned supervisor_pages_free = parts[6].to_uint(ok);
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ASSERT(ok);
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m_kmalloc_label->set_text(String::format("Kernel heap: %uK allocated, %uK free\n", bytes_to_kb(kmalloc_sum_alloc), bytes_to_kb(kmalloc_sum_free)));
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m_user_physical_pages_label->set_text(String::format("Userspace physical: %uK allocated, %uK free\n", page_count_to_kb(user_pages_alloc), page_count_to_kb(user_pages_free)));
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m_supervisor_physical_pages_label->set_text(String::format("Supervisor physical: %uK allocated, %uK free\n", page_count_to_kb(supervisor_pages_alloc), page_count_to_kb(supervisor_pages_free)));
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break;
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}
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fclose(fp);
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}
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void MemoryStatsWidget::timer_event(GTimerEvent&)
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{
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refresh();
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}
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void MemoryStatsWidget::paint_event(GPaintEvent& event)
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{
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Painter painter(*this);
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painter.set_clip_rect(event.rect());
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GStyle::the().paint_surface(painter, rect());
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}
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