feat(auth): 添加完整的用户认证API项目

- 实现用户注册、登录、JWT令牌认证功能
- 集成Gin、GORM、Viper、Zap等框架
- 添加密码加密、数据库操作、中间件等完整功能
- 配置多环境支持、日志轮转、CORS处理
- 创建完整的项目结构和配置文件体系

go并发模型/05go-sync-practice/go.mod

@@ -0,0 +1,3 @@
+module go-sync-practice
+
+go 1.22.2

go并发模型/05go-sync-practice/mutex_counter.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+)
+
+func main() {
+	var wg sync.WaitGroup
+	var mu sync.Mutex
+	counter := 0
+
+	for i := 0; i < 1000; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			for j := 0; j < 1000; j++ {
+				mu.Lock()
+				counter++
+				mu.Unlock()
+			}
+		}()
+	}
+
+	wg.Wait()
+	fmt.Println("期待的结果:", 1000*1000)
+	fmt.Println("实际结果:", counter)
+}

go并发模型/05go-sync-practice/race_counter.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+)
+
+func main() {
+	var wg sync.WaitGroup
+	counter := 0
+
+	for i := 0; i < 1000; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			for j := 0; j < 1000; j++ {
+				counter++
+			}
+		}()
+	}
+
+	wg.Wait()
+	fmt.Println("期待的结果:", 1000*1000)
+	fmt.Println("实际结果:", counter)
+}

go并发模型/05go-sync-practice/rwmutex_cache.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+	"time"
+)
+
+type Cache struct {
+	mu   sync.RWMutex
+	data map[string]string
+}
+
+func (c *Cache) Get(key string) string {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+	return c.data[key]
+}
+
+func (c *Cache) Set(key, value string) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	c.data[key] = value
+}
+
+func main() {
+	c := &Cache{data: make(map[string]string)}
+	c.Set("foo", "bar")
+
+	var wg sync.WaitGroup
+
+	// 多个读 goroutine
+	for i := 0; i < 5; i++ {
+		wg.Add(1)
+		go func(id int) {
+			defer wg.Done()
+			for j := 0; j < 5; j++ {
+				v := c.Get("foo")
+				fmt.Printf("reader-%d 第 %d 次读到: %s\n", id, j, v)
+				time.Sleep(100 * time.Millisecond)
+			}
+		}(i)
+	}
+
+	// 一个写 goroutine
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		time.Sleep(300 * time.Millisecond)
+		fmt.Println("writer: 更新 foo -> baz")
+		c.Set("foo", "baz")
+	}()
+
+	wg.Wait()
+}

go并发模型/05go-sync-practice/waitgroup_like_latch.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+	"time"
+)
+
+func worker(id int, wg *sync.WaitGroup) {
+	defer wg.Done()
+	fmt.Printf("worker-%d 开始工作\n", id)
+	time.Sleep(time.Duration(id) * 300 * time.Millisecond)
+	fmt.Printf("worker-%d 完成\n", id)
+}
+
+func main() {
+	var wg sync.WaitGroup
+
+	n := 3
+	wg.Add(n)
+
+	for i := 1; i <= n; i++ {
+		go worker(i, &wg)
+	}
+
+	fmt.Println("main: 等待所有 worker 完成...")
+	wg.Wait()
+	fmt.Println("main: 全部完成")
+}