模板赋值字符串问题

jd808

1. template <typename T>
   
2. struct ListNode {
   
3. #ifdef DOUBLY_LIST/*双向链表*/
   
4.     ListNode(off_t prior = -1, off_t next = -1, const T& data = T()):
   
5.         prior(prior), next(next), data(data) {
   
6.     }
   
7.     off_t prior;
   
8. #else
   
9.     ListNode(off_t next = -1, const T& data = T()):
   
10.         next(next), data(data) {
    
11.     }
    
12. #endif
    
13.     off_t next;
    
14.     T data;
    
15.     off_t key;
    
16.     int current_offset;
    
17. };
    
18. 
    
19. //p_free_node就是ListNode结构
    
20. ListNode<T>* p_free_node = CommonList<T, EXTEND>::
    
21.                 PopFreeNode(name, p_addr, p_list_head, &free_index, is_expand);
    
22. if (p_free_node) {
    
23.        p_free_node->data = data;//这里吧模板定义成整形,读取的时候就正常,定义成char*的时候读取不到,提示error: Cannot access memory at address 怎么破
    
24.        p_free_node->next = -1;
    

复制代码

p_free_node->data = data;//这里吧模板定义成整形,读取的时候就正常,定义成char*的时候读取不到,提示error: Cannot access memory at address 怎么破

这是共享内存,多个单独进程进行访问的