diff --git a/src/cachetools/__init__.py b/src/cachetools/__init__.py
index ad30175..3253ff1 100644
--- a/src/cachetools/__init__.py
+++ b/src/cachetools/__init__.py
@@ -23,6 +23,7 @@
 import time
 
 from . import keys
+from ._decorators import _cached_wrapper
 
 
 class _DefaultSize:
@@ -643,150 +644,28 @@ def cached(cache, key=keys.hashkey, lock=None, info=False):
 
     def decorator(func):
         if info:
-            hits = misses = 0
-
             if isinstance(cache, Cache):
 
-                def getinfo():
-                    nonlocal hits, misses
+                def make_info(hits, misses):
                     return _CacheInfo(hits, misses, cache.maxsize, cache.currsize)
 
             elif isinstance(cache, collections.abc.Mapping):
 
-                def getinfo():
-                    nonlocal hits, misses
+                def make_info(hits, misses):
                     return _CacheInfo(hits, misses, None, len(cache))
 
             else:
 
-                def getinfo():
-                    nonlocal hits, misses
+                def make_info(hits, misses):
                     return _CacheInfo(hits, misses, 0, 0)
 
-            if cache is None:
-
-                def wrapper(*args, **kwargs):
-                    nonlocal misses
-                    misses += 1
-                    return func(*args, **kwargs)
-
-                def cache_clear():
-                    nonlocal hits, misses
-                    hits = misses = 0
-
-                cache_info = getinfo
-
-            elif lock is None:
-
-                def wrapper(*args, **kwargs):
-                    nonlocal hits, misses
-                    k = key(*args, **kwargs)
-                    try:
-                        result = cache[k]
-                        hits += 1
-                        return result
-                    except KeyError:
-                        misses += 1
-                    v = func(*args, **kwargs)
-                    try:
-                        cache[k] = v
-                    except ValueError:
-                        pass  # value too large
-                    return v
-
-                def cache_clear():
-                    nonlocal hits, misses
-                    cache.clear()
-                    hits = misses = 0
-
-                cache_info = getinfo
-
-            else:
-
-                def wrapper(*args, **kwargs):
-                    nonlocal hits, misses
-                    k = key(*args, **kwargs)
-                    try:
-                        with lock:
-                            result = cache[k]
-                            hits += 1
-                            return result
-                    except KeyError:
-                        with lock:
-                            misses += 1
-                    v = func(*args, **kwargs)
-                    # in case of a race, prefer the item already in the cache
-                    try:
-                        with lock:
-                            return cache.setdefault(k, v)
-                    except ValueError:
-                        return v  # value too large
-
-                def cache_clear():
-                    nonlocal hits, misses
-                    with lock:
-                        cache.clear()
-                        hits = misses = 0
-
-                def cache_info():
-                    with lock:
-                        return getinfo()
-
+            wrapper = _cached_wrapper(func, cache, key, lock, make_info)
         else:
-            if cache is None:
-
-                def wrapper(*args, **kwargs):
-                    return func(*args, **kwargs)
-
-                def cache_clear():
-                    pass
-
-            elif lock is None:
-
-                def wrapper(*args, **kwargs):
-                    k = key(*args, **kwargs)
-                    try:
-                        return cache[k]
-                    except KeyError:
-                        pass  # key not found
-                    v = func(*args, **kwargs)
-                    try:
-                        cache[k] = v
-                    except ValueError:
-                        pass  # value too large
-                    return v
-
-                def cache_clear():
-                    cache.clear()
-
-            else:
-
-                def wrapper(*args, **kwargs):
-                    k = key(*args, **kwargs)
-                    try:
-                        with lock:
-                            return cache[k]
-                    except KeyError:
-                        pass  # key not found
-                    v = func(*args, **kwargs)
-                    # in case of a race, prefer the item already in the cache
-                    try:
-                        with lock:
-                            return cache.setdefault(k, v)
-                    except ValueError:
-                        return v  # value too large
-
-                def cache_clear():
-                    with lock:
-                        cache.clear()
-
-            cache_info = None
+            wrapper = _cached_wrapper(func, cache, key, lock, None)
 
         wrapper.cache = cache
         wrapper.cache_key = key
         wrapper.cache_lock = lock
-        wrapper.cache_clear = cache_clear
-        wrapper.cache_info = cache_info
 
         return functools.update_wrapper(wrapper, func)
 
diff --git a/src/cachetools/_decorators.py b/src/cachetools/_decorators.py
new file mode 100644
index 0000000..a5470f5
--- /dev/null
+++ b/src/cachetools/_decorators.py
@@ -0,0 +1,153 @@
+"""Extensible memoizing decorator helpers."""
+
+
+def _cached_locked_info(func, cache, key, lock, info):
+    hits = misses = 0
+
+    def wrapper(*args, **kwargs):
+        nonlocal hits, misses
+        k = key(*args, **kwargs)
+        try:
+            with lock:
+                result = cache[k]
+                hits += 1
+                return result
+        except KeyError:
+            with lock:
+                misses += 1
+        v = func(*args, **kwargs)
+        # in case of a race, prefer the item already in the cache
+        try:
+            with lock:
+                return cache.setdefault(k, v)
+        except ValueError:
+            return v  # value too large
+
+    def cache_clear():
+        nonlocal hits, misses
+        with lock:
+            cache.clear()
+            hits = misses = 0
+
+    def cache_info():
+        with lock:
+            return info(hits, misses)
+
+    wrapper.cache_clear = cache_clear
+    wrapper.cache_info = cache_info
+    return wrapper
+
+
+def _cached_unlocked_info(func, cache, key, info):
+    hits = misses = 0
+
+    def wrapper(*args, **kwargs):
+        nonlocal hits, misses
+        k = key(*args, **kwargs)
+        try:
+            result = cache[k]
+            hits += 1
+            return result
+        except KeyError:
+            misses += 1
+        v = func(*args, **kwargs)
+        try:
+            cache[k] = v
+        except ValueError:
+            pass  # value too large
+        return v
+
+    def cache_clear():
+        nonlocal hits, misses
+        cache.clear()
+        hits = misses = 0
+
+    wrapper.cache_clear = cache_clear
+    wrapper.cache_info = lambda: info(hits, misses)
+    return wrapper
+
+
+def _uncached_info(func, info):
+    misses = 0
+
+    def wrapper(*args, **kwargs):
+        nonlocal misses
+        misses += 1
+        return func(*args, **kwargs)
+
+    def cache_clear():
+        nonlocal misses
+        misses = 0
+
+    wrapper.cache_clear = cache_clear
+    wrapper.cache_info = lambda: info(0, misses)
+    return wrapper
+
+
+def _cached_locked(func, cache, key, lock):
+    def wrapper(*args, **kwargs):
+        k = key(*args, **kwargs)
+        try:
+            with lock:
+                return cache[k]
+        except KeyError:
+            pass  # key not found
+        v = func(*args, **kwargs)
+        # in case of a race, prefer the item already in the cache
+        try:
+            with lock:
+                return cache.setdefault(k, v)
+        except ValueError:
+            return v  # value too large
+
+    def cache_clear():
+        with lock:
+            cache.clear()
+
+    wrapper.cache_clear = cache_clear
+    return wrapper
+
+
+def _cached_unlocked(func, cache, key):
+    def wrapper(*args, **kwargs):
+        k = key(*args, **kwargs)
+        try:
+            return cache[k]
+        except KeyError:
+            pass  # key not found
+        v = func(*args, **kwargs)
+        try:
+            cache[k] = v
+        except ValueError:
+            pass  # value too large
+        return v
+
+    wrapper.cache_clear = lambda: cache.clear()
+    return wrapper
+
+
+def _uncached(func):
+    def wrapper(*args, **kwargs):
+        return func(*args, **kwargs)
+
+    wrapper.cache_clear = lambda: None
+    return wrapper
+
+
+def _cached_wrapper(func, cache, key, lock, info):
+    if info is not None:
+        if cache is None:
+            wrapper = _uncached_info(func, info)
+        elif lock is None:
+            wrapper = _cached_unlocked_info(func, cache, key, info)
+        else:
+            wrapper = _cached_locked_info(func, cache, key, lock, info)
+    else:
+        if cache is None:
+            wrapper = _uncached(func)
+        elif lock is None:
+            wrapper = _cached_unlocked(func, cache, key)
+        else:
+            wrapper = _cached_locked(func, cache, key, lock)
+        wrapper.cache_info = None
+    return wrapper