Performing getSize and getDiskCount on the ioQueue.

@@ -441,23 +441,26 @@ BOOL ImageDataHasPNGPreffix(NSData *data) {
 }
 }
 
 
 - (NSUInteger)getSize {
 - (NSUInteger)getSize {
-    NSUInteger size = 0;
-    NSDirectoryEnumerator *fileEnumerator = [[NSFileManager defaultManager] enumeratorAtPath:self.diskCachePath];
+    __block NSUInteger size = 0;
+    dispatch_sync(self.ioQueue, ^{
+        NSDirectoryEnumerator *fileEnumerator = [_fileManager enumeratorAtPath:self.diskCachePath];
         for (NSString *fileName in fileEnumerator) {
         for (NSString *fileName in fileEnumerator) {
             NSString *filePath = [self.diskCachePath stringByAppendingPathComponent:fileName];
             NSString *filePath = [self.diskCachePath stringByAppendingPathComponent:fileName];
             NSDictionary *attrs = [[NSFileManager defaultManager] attributesOfItemAtPath:filePath error:nil];
             NSDictionary *attrs = [[NSFileManager defaultManager] attributesOfItemAtPath:filePath error:nil];
             size += [attrs fileSize];
             size += [attrs fileSize];
         }
         }
+    });
     return size;
     return size;
 }
 }
 
 
 - (int)getDiskCount {
 - (int)getDiskCount {
-    int count = 0;
-    NSDirectoryEnumerator *fileEnumerator = [[NSFileManager defaultManager] enumeratorAtPath:self.diskCachePath];
+    __block int count = 0;
+    dispatch_sync(self.ioQueue, ^{
+        NSDirectoryEnumerator *fileEnumerator = [_fileManager enumeratorAtPath:self.diskCachePath];
         for (__unused NSString *fileName in fileEnumerator) {
         for (__unused NSString *fileName in fileEnumerator) {
             count += 1;
             count += 1;
         }
         }
-
+    });
     return count;
     return count;
 }
 }