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class Page { friend class BufferPoolManager; public: Page() { reset_memory(); } ~Page() = default; PageId get_page_id() const { return id_; } inline char *get_data() { return data_; } bool is_dirty() const { return is_dirty_; } static constexpr size_t OFFSET_PAGE_START = 0; static constexpr size_t OFFSET_LSN = 0; static constexpr size_t OFFSET_PAGE_HDR = 4; inline lsn_t get_page_lsn() { return *reinterpret_cast<lsn_t *>(get_data() + OFFSET_LSN) ; } inline void set_page_lsn(lsn_t page_lsn) { memcpy(get_data() + OFFSET_LSN, &page_lsn, sizeof(lsn_t)); } private: void reset_memory() { memset(data_, OFFSET_PAGE_START, PAGE_SIZE); } // 将data_的PAGE_SIZE个字节填充为0 /** page的唯一标识符 */ PageId id_; /** The actual data that is stored within a page. * 该页面在bufferPool中的偏移地址 */ char data_[PAGE_SIZE] = {}; /** 脏页判断 */ bool is_dirty_ = false; /** The pin count of this page. */ int pin_count_ = 0; };解释一下

时间: 2024-04-18 13:34:03 浏览: 238
这段代码定义了一个名为`Page`的类，用于表示一个页面。`Page`类具有以下成员变量和函数： - `friend class BufferPoolManager`：声明了`BufferPoolManager`类为友元类，以便访问`Page`类的私有成员。 - `Page()`：构造函数，用于初始化页面对象。在构造函数中调用`reset_memory()`函数将页面的数据区域初始化为0。 - `~Page()`：析构函数，默认实现。 - `get_page_id()`：返回页面的唯一标识符`id_`。 - `get_data()`：返回指向页面数据区域的指针。 - `is_dirty()`：返回页面是否被修改过（脏页）的状态。 - `OFFSET_PAGE_START`、`OFFSET_LSN`、`OFFSET_PAGE_HDR`：指定了在页面数据区域中的偏移位置。 - `get_page_lsn()`：获取页面的日志序列号（LSN）值。通过解释为`lsn_t`类型的指针，从数据区域中读取LSN的值。 - `set_page_lsn()`：设置页面的日志序列号（LSN）值。通过将传入的`page_lsn`值复制到数据区域中的对应位置。 - `reset_memory()`：将页面数据区域填充为0，即清空页面的内容。 - `id_`：页面的唯一标识符。 - `data_`：存储实际数据的数组，大小为`PAGE_SIZE`。 - `is_dirty_`：标志位，表示页面是否被修改过（脏页）。 - `pin_count_`：页面的引用计数，用于跟踪页面在缓冲池中的引用情况。
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[Vue warn]: Failed to resolve component: uni-rate If this is a native custom element, make sure to exclude it from component resolution via compilerOptions.isCustomElement. at <Operation__pageId=1__pagePath="pages/operation/operation"__pageQuery={"id":"11"} ...>

<text class="tag selected-tag">已选择: {{ getOptionText(question, detailData[question.field]) }} <view class="star-rating-container"> <!-- 使用自定义星级评分组件替代 uni-rate --> <view class=...

size_t CentralCache::FetchRangeObj(void*& start, void*& end, size_t batchNum,size_t size) { size_t index = SizeClass::Index(size); //先加锁 _spanLists[index]._mtx.lock(); //找到一个不为空的span Span* span = GetOneSpan(_spanLists[index],size); //断言span里面的_freeList是否为空，更严谨 assert(span); assert(span->_freeList); //从span中获取batchNum个对象 //如果不够，有多少拿多少 start = span->_freeList; end = start; size_t i = 0; size_t actualNum = 1; while (i < batchNum - 1 && NextObj(end) != nullptr) { //用end去遍历到最后一个位置 end = NextObj(end); ++i; actualNum++; } //_freeList与end后位置链接，end位置指向空 span->_freeList = NextObj(end); NextObj(end) = nullptr; span->_useCount += actualNum; //解锁 _spanLists[index]._mtx.unlock(); return actualNum; } Span* CentralCache::GetOneSpan(SpanList& list, size_t size) { Span *it = list.Begin(); while (it != list.end()) { //如果span中挂着的小内存块不为空，那么就直接使用/返回 if (it->_freeList != nullptr) { return it; } else { it = it->_next; } } //先把centralCache中的桶锁解掉，这样如果其他线程释放内存对象回来，不会阻塞 list._mtx.unlock(); //走到这里说明没有空闲span了，只能找page cache要了 //在外加锁，不影响其内递归 PageCache::GetInstance()->_pageMtx.lock(); Span* span=PageCache::GetInstance()->NewSpan(SizeClass::NumMovePage(size)); PageCache::GetInstance()->_pageMtx.unlock(); //对获取span切分，不需要加锁，因为span没有挂接，这会其他线程访问不到这个桶 //计算大块内存的起始地址和大块内存的大小(字节数) char* start = (char*)(span->_pageId << PAGE_SHIFT); size_t bytes = span->_n << PAGE_SHIFT; char* end = start += bytes; //把大块内存切成自由链表挂接起来 //先切一块下来做头部，方便尾插 span->_freeList = start; start += size; void* tail = span->_freeList; while (start < end) { NextObj(tail) = start; tail = NextObj(tail); start += size; } //切好之后，桶需要挂，那么就需要再加锁 list._mtx.lock(); list.PushFront(span); return span; }为什么调用函数 std::_Mutex_base::unlock 之前，调用方保留锁定 list->_mtx 失败。

class Span { std::mutex _spanMtx; void* _freeList; }; void FetchRangeObj(...) { _spanLists[index]._mtx.lock(); Span* span = GetOneSpan(...); span->_spanMtx.lock(); // 锁定具体Span _spanLists...

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Responsible","randomField0":"responsible","typespan":"文本","randomField2":"1","randomField1":"1","randomField4":"1","randomField3":"uf_FEMATZ_dt1","randomFieldId":"30097","dsporder":"28.00"},{"randomField1span":"1","fieldName":"targetcompletiondate","idspan":"加密设置","viewtype":"1","type":"1","dsporderspan":"29.00","fieldNamespan":"targetcompletiondate","groupnamespan":"","randomField2span":"1","randomFieldIdspan":"","id":"30098","viewtypespan":"明细表1","fieldhtmltype":"1","randomField3span":"uf_FEMATZ_dt1","fieldhtmltypespan":"单行文本框","randomField4span":"1","fieldlabel":"-126401","groupname":"","randomField0span":"targetcompletiondate","fieldlabelspan":"6-4 Target completion date","randomField0":"targetcompletiondate","typespan":"文本","randomField2":"1","randomField1":"1","randomField4":"1","randomField3":"uf_FEMATZ_dt1","randomFieldId":"30098","dsporder":"29.00"},{"randomField1span":"1","fieldName":"opendone","idspan":"加密设置","viewtype":"1","type":"1","dsporderspan":"30.00","fieldNamespan":"opendone","groupnamespan":"","randomField2span":"1","randomFieldIdspan":"","id":"30099","viewtypespan":"明细表1","fieldhtmltype":"1","randomField3span":"uf_FEMATZ_dt1","fieldhtmltypespan":"单行文本框","randomField4span":"1","fieldlabel":"-126402","groupname":"","randomField0span":"opendone","fieldlabelspan":"6-5 (open done)","randomField0":"opendone","typespan":"文本","randomField2":"1","randomField1":"1","randomField4":"1","randomField3":"uf_FEMATZ_dt1","randomFieldId":"30099","dsporder":"30.00"},{"randomField1span":"1","fieldName":"actiontakenwithpointertoeviden","idspan":"加密设置","viewtype":"1","type":"1","dsporderspan":"31.00","fieldNamespan":"actiontakenwithpointertoeviden","groupnamespan":"","randomField2span":"1","randomFieldIdspan":"","id":"30100","viewtypespan":"明细表1","fieldhtmltype":"1","randomField3span":"uf_FEMATZ_dt1","fieldhtmltypespan":"单行文本框","randomField4span":"1","fieldlabel":"-126403","groupname":"","randomField0span":"actiontakenwithpointertoeviden","fieldlabelspan":"6-6 Action taken with pointer to evidence","randomField0":"actiontakenwithpointertoeviden","typespan":"文本","randomField2":"1","randomField1":"1","randomField4":"1","randomField3":"uf_FEMATZ_dt1","randomFieldId":"30100","dsporder":"31.00"},{"randomField1span":"1","fieldName":"completiondate","idspan":"加密设置","viewtype":"1","type":"1","dsporderspan":"32.00","fieldNamespan":"completiondate","groupnamespan":"","randomField2span":"1","randomFieldIdspan":"","id":"30101","viewtypespan":"明细表1","fieldhtmltype":"1","randomField3span":"uf_FEMATZ_dt1","fieldhtmltypespan":"单行文本框","randomField4span":"1","fieldlabel":"-126404","groupname":"","randomField0span":"completiondate","fieldlabelspan":"6-7 Completion date","randomField0":"completiondate","typespan":"文本","randomField2":"1","randomField1":"1","randomField4":"1","randomField3":"uf_FEMATZ_dt1","randomFieldId":"30101","dsporder":"32.00"},{"randomField1span":"1","fieldName":"severitys","idspan":"加密设置","viewtype":"1","type":"1","dsporderspan":"33.00","fieldNamespan":"severitys","groupnamespan":"","randomField2span":"1","randomFieldIdspan":"","id":"30102","viewtypespan":"明细表1","fieldhtmltype":"1","randomField3span":"uf_FEMATZ_dt1","fieldhtmltypespan":"单行文本框","randomField4span":"1","fieldlabel":"-126405","groupname":"","randomField0span":"severitys","fieldlabelspan":"6-8 Severity (S)","randomField0":"severitys","typespan":"文本","randomField2":"1","randomField1":"1","randomField4":"1","randomField3":"uf_FEMATZ_dt1","randomFieldId":"30102","dsporder":"33.00"},{"randomField1span":"1","fieldName":"occurrenceo","idspan":"加密设置","viewtype":"1","type":"1","dsporderspan":"34.00","fieldNamespan":"occurrenceo","groupnamespan":"","randomField2span":"1","randomFieldIdspan":"","id":"30103","viewtypespan":"明细表1","fieldhtmltype":"1","randomField3span":"uf_FEMATZ_dt1","fieldhtmltypespan":"单行文本框","randomField4span":"1","fieldlabel":"-126406","groupname":"","randomField0span":"occurrenceo","fieldlabelspan":"6-9 Occurrence (O)","randomField0":"occurrenceo","typespan":"文本","randomField2":"1","randomField1":"1","randomField4":"1","randomField3":"uf_FEMATZ_dt1","randomFieldId":"30103","dsporder":"34.00"},{"randomField1span":"1","fieldName":"detectiond","idspan":"加密设置","viewtype":"1","type":"1","dsporderspan":"35.00","fieldNamespan":"detectiond","groupnamespan":"","randomField2span":"1","randomFieldIdspan":"","id":"30104","viewtypespan":"明细表1","fieldhtmltype":"1","randomField3span":"uf_FEMATZ_dt1","fieldhtmltypespan":"单行文本框","randomField4span":"1","fieldlabel":"-126407","groupname":"","randomField0span":"detectiond","fieldlabelspan":"6-10 Detection (D)","randomField0":"detectiond","typespan":"文本","randomField2":"1","randomField1":"1","randomField4":"1","randomField3":"uf_FEMATZ_dt1","randomFieldId":"30104","dsporder":"35.00"},{"randomField1span":"1","fieldName":"ap","idspan":"加密设置","viewtype":"1","type":"1","dsporderspan":"36.00","fieldNamespan":"ap","groupnamespan":"","randomField2span":"1","randomFieldIdspan":"","id":"30105","viewtypespan":"明细表1","fieldhtmltype":"1","randomField3span":"uf_FEMATZ_dt1","fieldhtmltypespan":"单行文本框","randomField4span":"1","fieldlabel":"-126408","groupname":"","randomField0span":"ap","fieldlabelspan":"6-11 AP","randomField0":"ap","typespan":"文本","randomField2":"1","randomField1":"1","randomField4":"1","randomField3":"uf_FEMATZ_dt1","randomFieldId":"30105","dsporder":"36.00"},{"randomField1span":"1","fieldName":"scs6andapmoraphyn","idspan":"加密设置","viewtype":"1","type":"1","dsporderspan":"37.00","fieldNamespan":"scs6andapmoraphyn","groupnamespan":"","randomField2span":"1","randomFieldIdspan":"","id":"30106","viewtypespan":"明细表1","fieldhtmltype":"1","randomField3span":"uf_FEMATZ_dt1","fieldhtmltypespan":"单行文本框","randomField4span":"1","fieldlabel":"-126409","groupname":"","randomField0span":"scs6andapmoraphyn","fieldlabelspan":"6-12 SC (S＞=6 and AP=M or AP=H Y/N)","randomField0":"scs6andapmoraphyn","typespan":"文本","randomField2":"1","randomField1":"1","randomField4":"1","randomField3":"uf_FEMATZ_dt1","randomFieldId":"30106","dsporder":"37.00"},{"randomField1span":"1","fieldName":"remark","idspan":"加密设置","viewtype":"1","type":"1","dsporderspan":"38.00","fieldNamespan":"remark","groupnamespan":"","randomField2span":"1","randomFieldIdspan":"","id":"30107","viewtypespan":"明细表1","fieldhtmltype":"1","randomField3span":"uf_FEMATZ_dt1","fieldhtmltypespan":"单行文本框","randomField4span":"1","fieldlabel":"-126410","groupname":"","randomField0span":"remark","fieldlabelspan":"Remark","randomField0":"remark","typespan":"文本","randomField2":"1","randomField1":"1","randomField4":"1","randomField3":"uf_FEMATZ_dt1","randomFieldId":"30107","dsporder":"38.00"}],"haveCheck":true,"rootMap":{"tabletype":"checkbox","counttransmethod":"false","pagesize":"10","pageUid":"be52013a-6e4e-4da7-be06-9abaaa0d62cd","pageId":"Wf:form_editformfield","mobileshowtype":"listview"},"pageSize":"100","timeJson":{"read data in dao":2,"read data from datasource":0,"do browser":0,"last":0,"init Bean":1,"get current user and count page ":25,"all cost":64,"do transMethod in dao":36,"create sql":0},"expandOperate":0,"mobileshowtype":"listview","status":true} 帮我格式化一下

为了提高 JSON 数据的可读性，可以采用以下方法进行格式化。格式化的目标是使数据结构清晰、层级分明，便于开发人员阅读和调试。以下是一些推荐的格式化方式： ### 1....将 JSON 数据按照层级结构进行缩进和换行，使每...

<template> <view class="login-container"> <view class="login-form"> <text class="login-title">用户登录</text> <input v-model="username" placeholder="用户名" class="login-input" placeholder-class="input-placeholder" /> <input v-model="password" type="password" placeholder="密码" class="login-input" placeholder-class="input-placeholder" /> <button class="login-button" :loading="loading" @click="handleLogin" >登录</button> </view> </view> </template> <script> import { ref } from 'vue' export default { setup() { const username = ref('') const password = ref('') const loading = ref(false) const handleLogin = async () => { // 验证输入 if (!username.value.trim()) { uni.showToast({ title: '请输入用户名', icon: 'none', duration: 2000 }) return } if (!password.value) { uni.showToast({ title: '请输入密码', icon: 'none', duration: 2000 }) return } loading.value = true try { // 兼容性请求 const response = await new Promise((resolve, reject) => { uni.request({ url: 'http://172.26.26.43/dev-api/login', method: 'POST', data: { username: username.value, password: password.value }, header: { 'Content-Type': 'application/json' }, timeout: 10000, success: (res) => resolve(res), fail: (err) => reject(err) }) }) // 处理响应 await handleResponse(response) } catch (error) { console.error('登录请求出错:', error) let errorMsg = '登录失败，请重试' if (error.errMsg) { errorMsg = 请求失败: ${error.errMsg} } else if (error.message) { errorMsg = error.message } uni.showToast({ title: errorMsg, icon: 'none', duration: 2000 }) } finally { loading.value = false } } const handleResponse = async (response) => { // 检查HTTP状态码 if (response.statusCode < 200 || response.statusCode >= 300) { throw new Error(服务器错误: ${response.statusCode}) } // 解析响应数据 const { data } = response if (!data) { throw new Error('服务器返回空数据') } const { code, message, token } = data if (code === 200) { // 存储token uni.setStorageSync('token', token) uni.showToast({ title: '登录成功！', icon: 'success', duration: 1000 }) // 登录成功后跳转 setTimeout(() => { uni.redirectTo({ url: '/pages/detail/detail?id=123' }) }, 1000) } else { throw new Error(登录失败: ${message || '未知错误'}) } } return { username, password, loading, handleLogin } } } </script> <style scoped> .login-container { display: flex; justify-content: center; align-items: center; min-height: 100vh; padding: 32rpx; background-color: #f5f5f5; } .login-form { width: 100%; max-width: 600rpx; padding: 60rpx; background: #fff; border-radius: 16rpx; box-shadow: 0 4rpx 20rpx rgba(0, 0, 0, 0.1); } .login-title { display: block; text-align: center; margin-bottom: 60rpx; font-size: 40rpx; font-weight: bold; color: #333; } .login-input { width: 100%; height: 88rpx; padding: 0 24rpx; margin-bottom: 40rpx; border: 2rpx solid #ddd; border-radius: 12rpx; font-size: 32rpx; box-sizing: border-box; } .input-placeholder { color: #999; font-size: 32rpx; } .login-button { width: 100%; height: 88rpx; line-height: 88rpx; background-color: #007aff; color: white; font-size: 32rpx; border-radius: 12rpx; margin-top: 20rpx; } .login-button:active { background-color: #0062cc; opacity: 0.9; } </style> 报错：09:16:45.721 应用【vue3-uni-mycp】已启动 09:17:07.568 跳转登录页成功 at pages/index/index.vue:16 09:17:17.980 Listener added for a 'DOMNodeInserted' mutation event. Support for this event type has been removed, and this event will no longer be fired. See https://chromestatus.com/feature/5083947249172480 for more information. at __uniappquill.js:7 09:17:22.990 [Vue warn]: Unhandled error during execution of native event handler at <Operation__pageId=4__pagePath="pages/operation/operation"__pageQuery={"id":"11"} ...> 09:17:22.990 TypeError: _ctx.setRating is not a function 09:17:34.523 [Vue warn]: Unhandled error during execution of native event handler at <Operation__pageId=4__pagePath="pages/operation/operation"__pageQuery={"id":"11"} ...> 09:17:34.523 TypeError: _ctx.setScore26 is not a function 09:17:36.069 [Vue warn]: Unhandled error during execution of native event handler at <Operation__pageId=4__pagePath="pages/operation/operation"__pageQuery={"id":"11"} ...> 09:17:36.070 TypeError: _ctx.setRating is not a function 09:17:37.818 App Hide at App.vue:10

export default { setup() { // 定义rating和score26的状态 const rating = ref(0); const score26 = ref(0); // 定义设置rating的方法 const setRating = (value) => { rating.value = value; }; // ...
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langchain4j-anthropic-spring-boot-starter-0.31.0.jar中文文档.zip

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