move global variable to local static variable

yoshito-n-students · Apr 9, 2018 · de4b37d · de4b37d
1 parent 36bcba1
commit de4b37d
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/epos_hardware/src/util/utils.cpp b/epos_hardware/src/util/utils.cpp
@@ -76,10 +76,10 @@ DeviceHandle::DeviceHandle(const DeviceInfo &device_info) : ptr(makePtr(device_i
 
 DeviceHandle::~DeviceHandle() {}
 
-// global storage of opened devices
-std::map< DeviceInfo, boost::weak_ptr< void >, LessDeviceInfo > existing_device_ptrs;
-
 boost::shared_ptr< void > DeviceHandle::makePtr(const DeviceInfo &device_info) {
+  // shared storage of opened devices
+  static std::map< DeviceInfo, boost::weak_ptr< void >, LessDeviceInfo > existing_device_ptrs;
+
   // try find an existing device
   const boost::shared_ptr< void > existing_device_ptr(existing_device_ptrs[device_info].lock());
   if (existing_device_ptr) {