some modification about directory feature

include/spdlog/details/file_helper.h

@@ -51,8 +51,12 @@ public:
         _filename = fname;
         for (int tries = 0; tries < open_tries; ++tries)
         {
+            if (os::dir_check(fname, dirs))
+                if(os::create_dirs(dirs))
+                    return;
+
             if (!os::fopen_s(&_fd, fname, mode))
-                return;
+                return ;
 
             std::this_thread::sleep_for(std::chrono::milliseconds(open_interval));
         }
@@ -133,6 +137,7 @@ public:
 
 private:
     FILE* _fd;
+    std::list<std::string> dirs;
     std::string _filename;
     bool _force_flush;
 

include/spdlog/details/os.h

@@ -195,14 +195,6 @@ inline int fopen_s(FILE** fp, const std::string& filename, const char* mode)
     *fp = _fsopen((filename.c_str()), mode, _SH_DENYWR);
     return *fp == nullptr;
 #else
-    std::list<std::string> dirs;
-
-    if(dir_check(filename, dirs)) 
-    {
-        if(create_dirs(dirs))
-            return true;
-    }
-
     *fp = fopen((filename.c_str()), mode);
     return *fp == nullptr;