fix the bug about device reset

source/tensor/XDevice.cpp

@@ -191,18 +191,17 @@ void XDevice::Clear()
 
 void XDevice::Reset()
 {
-    Clear();
+    XMem * mem = GMems.GetMem(devID);
+    mem->Free();
 
-    if (!isInitialized)
-        return;
+    int devIDReset = devID;
+    Clear();
 
-    for (int i = 0; i < MAX_CPU_MEM_NUM; i++) 
-        delete GMems.GetMem(devID);
 #ifdef USE_CUDA
-    if (devID >= 0) {
+    if (devIDReset >= 0) {
         int devIDBackup = -1;
         cudaGetDevice(&devIDBackup);
-        cudaSetDevice(devID);
+        cudaSetDevice(devIDReset);
 
         cudaDeviceReset();
 

source/tensor/XMem.cpp

@@ -176,8 +176,9 @@ void XMem::Initialize(int myDevID, MEMPOOL_MODE myMode, MTYPE myBlockSize, int m
 /* free memory */
 void XMem::Free()
 {
-    for(int i = 0; i < blockNum; i++){
-        Free(devID, blocks[i].mem);
+    for (int i = 0; i < blockNum; i++) {
+        if (blocks != NULL)
+            Free(devID, blocks[i].mem);
     }
     delete[] blocks;
     blocks = NULL;