43 static malloc_mem_chunk_t *malloc_free_list = NULL;
44 static malloc_mem_chunk_t *malloc_free_list_end = NULL; // 空闲链表的末尾结点
72     if (malloc_free_list == NULL)  in malloc_query_free_chunk_bf()
74         return NULL;  in malloc_query_free_chunk_bf()
77     malloc_mem_chunk_t *best = NULL;  in malloc_query_free_chunk_bf()
79     while (ptr != NULL)  in malloc_query_free_chunk_bf()
90             if (best == NULL)  in malloc_query_free_chunk_bf()
109     if (malloc_free_list == NULL)  in malloc_query_free_chunk_ff()
110         return NULL;  in malloc_query_free_chunk_ff()
122     return NULL;  in malloc_query_free_chunk_ff()
161     new_ck->prev = NULL;  in malloc_enlarge()
162     new_ck->next = NULL;  in malloc_enlarge()
176     if (malloc_free_list == NULL)  in malloc_merge_free_chunk()
179     while (ptr != NULL)  in malloc_merge_free_chunk()
188             if (ptr->next == NULL)  in malloc_merge_free_chunk()
206     if (malloc_free_list == NULL) // 空闲链表为空  in malloc_insert_free_list()
210         ck->prev = ck->next = NULL;  in malloc_insert_free_list()
217         while (ptr != NULL)  in malloc_insert_free_list()
221                 if (ptr->next == NULL) // 当前是最后一个项  in malloc_insert_free_list()
224                     ck->next = NULL;  in malloc_insert_free_list()
241                 if (ptr->prev == NULL) // 是第一个项  in malloc_insert_free_list()
244                     ck->prev = NULL;  in malloc_insert_free_list()
283     if (ck == NULL) // 没有空闲块  in malloc()
310     if (ck == NULL)  in malloc()
315     if (ck->prev == NULL) // 当前是链表的第一个块  in malloc()
322     if (ck->next != NULL) // 当前不是最后一个块  in malloc()
333         new_ck->prev = new_ck->next = NULL;  in malloc()
351     if (malloc_free_list_end == NULL)  in release_brk()