realloc

char** g_pInstanceLayersArray = NULL;
char** g_pInstanceLayersArrayNew = NULL;
unsigned int uiSize;
------
//(1)
uiSize = 1;
g_pInstanceLayersArray = (char**) realloc(g_pInstanceLayersArray,sizeof(char*)*uiSize);
------
//(2)
uiSize = 1;
g_pInstanceLayersArrayNew = (char**) realloc(g_pInstanceLayersArray,sizeof(char*)*uiSize);
if(g_pInstanceLayersArrayNew) g_pInstanceLayersArray = g_pInstanceLayersArrayNew;
else{
//realloc fail
if(g_pInstanceLayersArray) free(g_pInstanceLayersArray);
}
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