sanbuphy
399913d3ff
Clean up visual presentation by removing decorative icons from demo headers and info boxes across all components. Also removes now-unused CSS rules for icon styling.
297 lines
6.8 KiB
Vue
297 lines
6.8 KiB
Vue
<template>
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<div class="memory-demo">
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<div class="demo-header">
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<span class="title">内存管理：程序的"工作台"</span>
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<span class="subtitle">操作系统如何分配和管理内存</span>
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</div>
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<div class="demo-content">
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<div class="memory-visual">
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<div class="mem-header">
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<span>虚拟内存空间 (4GB)</span>
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<span class="used-info">已用: {{ usedMemory }}MB / 4096MB</span>
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</div>
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<div class="mem-blocks">
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<div
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v-for="(block, i) in memoryBlocks"
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:key="i"
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class="mem-block"
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:class="{ allocated: block.allocated, selected: selectedBlock === i }"
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:style="{ height: block.size + '%' }"
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@click="selectedBlock = i"
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>
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<span
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v-if="block.size > 5"
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class="block-label"
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>{{ block.name }}</span>
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<span
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v-if="block.size > 8"
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class="block-size"
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>{{ block.sizeMB }}MB</span>
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</div>
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</div>
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</div>
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<div class="memory-info">
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<div class="info-section">
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<div class="section-title">
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内存分配策略
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</div>
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<div class="strategy-tabs">
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<button
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v-for="s in strategies"
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:key="s.name"
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:class="['strat-btn', { active: activeStrategy === s.name }]"
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@click="activeStrategy = s.name"
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>
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{{ s.name }}
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</button>
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</div>
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<div class="strategy-desc">
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{{ currentStrategy.desc }}
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</div>
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</div>
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<div class="info-section">
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<div class="section-title">
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虚拟内存的作用
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</div>
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<div class="vm-benefits">
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<div
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v-for="b in benefits"
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:key="b.title"
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class="benefit-item"
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>
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<span class="benefit-icon">{{ b.icon }}</span>
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<div class="benefit-content">
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<span class="benefit-title">{{ b.title }}</span>
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<span class="benefit-desc">{{ b.desc }}</span>
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</div>
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</div>
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</div>
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</div>
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</div>
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</div>
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<div class="info-box">
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<strong>核心思想：</strong>虚拟内存让每个进程都以为自己独占整个内存空间，实际由操作系统统一管理和映射，实现隔离和保护。
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</div>
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</div>
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</template>
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<script setup>
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import { ref, computed } from 'vue'
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const selectedBlock = ref(0)
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const activeStrategy = ref('首次适应')
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const memoryBlocks = ref([
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{ name: '内核空间', size: 25, allocated: true, sizeMB: 1024 },
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{ name: '进程A', size: 15, allocated: true, sizeMB: 600 },
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{ name: '空闲', size: 5, allocated: false, sizeMB: 200 },
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{ name: '进程B', size: 20, allocated: true, sizeMB: 800 },
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{ name: '空闲', size: 10, allocated: false, sizeMB: 400 },
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{ name: '进程C', size: 10, allocated: true, sizeMB: 400 },
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{ name: '空闲', size: 15, allocated: false, sizeMB: 600 }
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])
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const strategies = [
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{ name: '首次适应', desc: '从内存开始找，找到第一个足够大的空闲块就分配。速度快，但可能产生小碎片。' },
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{ name: '最佳适应', desc: '找最小的能满足需求的空闲块。内存利用率高，但可能产生很多小碎片。' },
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{ name: '最坏适应', desc: '找最大的空闲块分配。减少小碎片，但大块内存很快用完。' }
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]
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const benefits = [
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{ icon: '🔒', title: '内存隔离', desc: '进程间互不干扰，一个崩溃不影响其他' },
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{ icon: '📦', title: '内存保护', desc: '防止进程访问不该访问的内存区域' },
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{ icon: '💾', title: '内存扩展', desc: '用磁盘当内存用，突破物理内存限制' }
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]
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const currentStrategy = computed(() => {
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return strategies.find(s => s.name === activeStrategy.value)
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})
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const usedMemory = computed(() => {
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return memoryBlocks.value
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.filter(b => b.allocated)
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.reduce((sum, b) => sum + b.sizeMB, 0)
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})
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</script>
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<style scoped>
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.memory-demo {
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border: 1px solid var(--vp-c-divider);
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border-radius: 8px;
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background: var(--vp-c-bg-soft);
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padding: 1rem;
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margin: 1rem 0;
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}
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.demo-header {
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display: flex;
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align-items: center;
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gap: 0.5rem;
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margin-bottom: 0.75rem;
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}
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.demo-header .title { font-weight: bold; font-size: 1rem; }
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.demo-header .subtitle { color: var(--vp-c-text-2); font-size: 0.85rem; margin-left: 0.5rem; }
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.demo-content {
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display: flex;
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gap: 1rem;
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flex-wrap: wrap;
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}
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.memory-visual {
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flex: 1;
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min-width: 200px;
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}
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.mem-header {
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display: flex;
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justify-content: space-between;
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font-size: 0.8rem;
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margin-bottom: 0.5rem;
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padding: 0.25rem 0.5rem;
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background: var(--vp-c-bg-alt);
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border-radius: 4px;
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}
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.used-info {
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color: var(--vp-c-brand);
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font-weight: bold;
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}
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.mem-blocks {
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display: flex;
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flex-direction: column;
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gap: 2px;
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height: 250px;
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border: 1px solid var(--vp-c-divider);
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border-radius: 4px;
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overflow: hidden;
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}
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.mem-block {
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display: flex;
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flex-direction: column;
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align-items: center;
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justify-content: center;
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cursor: pointer;
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transition: all 0.2s;
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}
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.mem-block.allocated {
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background: var(--vp-c-brand-soft);
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}
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.mem-block:not(.allocated) {
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background: var(--vp-c-bg);
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border: 1px dashed var(--vp-c-divider);
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}
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.mem-block.selected {
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outline: 2px solid var(--vp-c-brand);
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}
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.block-label {
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font-size: 0.75rem;
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font-weight: bold;
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}
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.block-size {
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font-size: 0.65rem;
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color: var(--vp-c-text-2);
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}
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.memory-info {
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flex: 1;
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min-width: 280px;
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}
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.info-section {
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margin-bottom: 1rem;
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}
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.section-title {
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font-weight: bold;
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font-size: 0.9rem;
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margin-bottom: 0.5rem;
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}
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.strategy-tabs {
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display: flex;
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gap: 0.25rem;
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margin-bottom: 0.5rem;
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}
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.strat-btn {
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padding: 0.25rem 0.5rem;
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border: 1px solid var(--vp-c-divider);
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background: var(--vp-c-bg);
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border-radius: 4px;
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font-size: 0.75rem;
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cursor: pointer;
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}
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.strat-btn.active {
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background: var(--vp-c-brand);
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color: white;
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border-color: var(--vp-c-brand);
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}
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.strategy-desc {
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font-size: 0.8rem;
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color: var(--vp-c-text-2);
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background: var(--vp-c-bg);
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padding: 0.5rem;
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border-radius: 4px;
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}
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.vm-benefits {
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display: flex;
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flex-direction: column;
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gap: 0.5rem;
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}
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.benefit-item {
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display: flex;
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gap: 0.5rem;
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padding: 0.5rem;
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background: var(--vp-c-bg);
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border-radius: 4px;
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}
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.benefit-icon {
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font-size: 1.2rem;
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}
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.benefit-content {
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display: flex;
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flex-direction: column;
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}
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.benefit-title {
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font-weight: bold;
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font-size: 0.85rem;
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}
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.benefit-desc {
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font-size: 0.75rem;
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color: var(--vp-c-text-2);
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}
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.info-box {
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background: var(--vp-c-bg-alt);
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padding: 0.75rem;
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border-radius: 6px;
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font-size: 0.85rem;
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color: var(--vp-c-text-2);
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margin-top: 0.75rem;
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display: flex;
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gap: 0.25rem;
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}
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</style>
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