Remove unnecessary copy constructors and operator= (#2468)

src/cache.h

@@ -104,6 +104,10 @@ class StatCache
     private:
         StatCache();
         ~StatCache();
+        StatCache(const StatCache&) = delete;
+        StatCache(StatCache&&) = delete;
+        StatCache& operator=(const StatCache&) = delete;
+        StatCache& operator=(StatCache&&) = delete;
 
         void Clear();
         bool GetStat(const std::string& key, struct stat* pst, headers_t* meta, bool overcheck, const char* petag, bool* pisforce);

src/curl_multi.h

@@ -65,6 +65,10 @@ class S3fsMultiCurl
     public:
         explicit S3fsMultiCurl(int maxParallelism, bool not_abort = false);
         ~S3fsMultiCurl();
+        S3fsMultiCurl(const S3fsMultiCurl&) = delete;
+        S3fsMultiCurl(S3fsMultiCurl&&) = delete;
+        S3fsMultiCurl& operator=(const S3fsMultiCurl&) = delete;
+        S3fsMultiCurl& operator=(S3fsMultiCurl&&) = delete;
 
         int GetMaxParallelism() const { return maxParallelism; }
 

src/fdcache.h

@@ -58,6 +58,10 @@ class FdManager
   public:
       FdManager();
       ~FdManager();
+      FdManager(const FdManager&) = delete;
+      FdManager(FdManager&&) = delete;
+      FdManager& operator=(const FdManager&) = delete;
+      FdManager& operator=(FdManager&&) = delete;
 
       // Reference singleton
       static FdManager* get() { return &singleton; }

src/fdcache_page.h

@@ -99,7 +99,9 @@ class PageList
 
         explicit PageList(off_t size = 0, bool is_loaded = false, bool is_modified = false, bool shrinked = false);
         PageList(const PageList&) = delete;
+        PageList(PageList&&) = delete;
         PageList& operator=(const PageList&) = delete;
+        PageList& operator=(PageList&&) = delete;
         ~PageList();
 
         bool Init(off_t size, bool is_loaded, bool is_modified);

src/fdcache_stat.h

@@ -46,6 +46,10 @@ class CacheFileStat
 
         explicit CacheFileStat(const char* tpath = nullptr);
         ~CacheFileStat();
+        CacheFileStat(const CacheFileStat&) = delete;
+        CacheFileStat(CacheFileStat&&) = delete;
+        CacheFileStat& operator=(const CacheFileStat&) = delete;
+        CacheFileStat& operator=(CacheFileStat&&) = delete;
 
         bool Open();
         bool ReadOnlyOpen();