ListDictionary handle NULL list argument.

diff --git a/winpr/libwinpr/utils/collections/ListDictionary.c b/winpr/libwinpr/utils/collections/ListDictionary.c
index b8cf90f..40cb72b 100644 (file)
--- a/winpr/libwinpr/utils/collections/ListDictionary.c
+++ b/winpr/libwinpr/utils/collections/ListDictionary.c
@@ -45,6 +45,9 @@ int ListDictionary_Count(wListDictionary* listDictionary)
        int count = 0;
        wListDictionaryItem* item;
 
+       if (!listDictionary)
+               return -1;
+
        if (listDictionary->synchronized)
                EnterCriticalSection(&listDictionary->lock);
 
@@ -98,6 +101,9 @@ BOOL ListDictionary_IsSynchronized(wListDictionary* listDictionary)
 
 void ListDictionary_Lock(wListDictionary* listDictionary)
 {
+       if (!listDictionary)
+               return;
+
        EnterCriticalSection(&listDictionary->lock);
 }
 
@@ -107,6 +113,9 @@ void ListDictionary_Lock(wListDictionary* listDictionary)
 
 void ListDictionary_Unlock(wListDictionary* listDictionary)
 {
+       if (!listDictionary)
+               return;
+
        LeaveCriticalSection(&listDictionary->lock);
 }
 
@@ -187,6 +196,9 @@ BOOL ListDictionary_Add(wListDictionary* listDictionary, void* key, void* value)
        wListDictionaryItem* lastItem;
        BOOL ret = FALSE;
 
+       if (!listDictionary)
+               return FALSE;
+
        if (listDictionary->synchronized)
                EnterCriticalSection(&listDictionary->lock);
 
@@ -230,6 +242,9 @@ void ListDictionary_Clear(wListDictionary* listDictionary)
        wListDictionaryItem* item;
        wListDictionaryItem* nextItem;
 
+       if (!listDictionary)
+               return;
+
        if (listDictionary->synchronized)
                EnterCriticalSection(&listDictionary->lock);
 
@@ -267,6 +282,9 @@ BOOL ListDictionary_Contains(wListDictionary* listDictionary, void* key)
        wListDictionaryItem* item;
        OBJECT_EQUALS_FN keyEquals;
 
+       if (!listDictionary)
+               return FALSE;
+
        if (listDictionary->synchronized)
                EnterCriticalSection(&(listDictionary->lock));
 
@@ -298,6 +316,9 @@ void* ListDictionary_Remove(wListDictionary* listDictionary, void* key)
        wListDictionaryItem* prevItem;
        OBJECT_EQUALS_FN keyEquals;
 
+       if (!listDictionary)
+               return NULL;
+
        if (listDictionary->synchronized)
                EnterCriticalSection(&listDictionary->lock);
 
@@ -338,6 +359,9 @@ void *ListDictionary_Remove_Head(wListDictionary* listDictionary)
        wListDictionaryItem* item;
        void *value = NULL;
 
+       if (!listDictionary)
+               return NULL;
+
        if (listDictionary->synchronized)
                EnterCriticalSection(&listDictionary->lock);
 
@@ -364,6 +388,9 @@ void* ListDictionary_GetItemValue(wListDictionary* listDictionary, void* key)
        wListDictionaryItem* item = NULL;
        OBJECT_EQUALS_FN keyEquals;
 
+       if (!listDictionary)
+               return NULL;
+
        if (listDictionary->synchronized)
                EnterCriticalSection(&listDictionary->lock);
 
@@ -400,6 +427,9 @@ BOOL ListDictionary_SetItemValue(wListDictionary* listDictionary, void* key, voi
        wListDictionaryItem* item;
        OBJECT_EQUALS_FN keyEquals;
 
+       if (!listDictionary)
+               return FALSE;
+
        if (listDictionary->synchronized)
                EnterCriticalSection(&listDictionary->lock);