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Searched refs:NULL (Results 1 – 25 of 57) sorted by relevance

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/DragonOS-0.1.8/kernel/src/libs/
Dbitree.c22 if (node == NULL || cmp == NULL) in bt_create_tree()
30 root->size = (node == NULL) ? 0 : 1; in bt_create_tree()
46 FAIL_ON_TO(node == NULL, nomem); in bt_create_node()
67 if (root == NULL) in bt_insert()
71 struct bt_node_t *last_node = NULL; in bt_insert()
72 struct bt_node_t *insert_node = bt_create_node(NULL, NULL, NULL, value); in bt_insert()
75 while (this_node != NULL) in bt_insert()
85 if (unlikely(last_node == NULL)) in bt_insert()
115 if (ret_addr == NULL) in bt_query()
118 while (this_node != NULL && !equal(root, this_node, &tmp_node)) in bt_query()
[all …]
Didr.c61 return NULL; in __get_from_free_list()
71 if (item == NULL) in __get_from_free_list()
79 item->ary[0] = NULL; // 记得清空原来的数据 in __get_from_free_list()
102 if (unlikely(new_one == NULL)) in idr_preload()
130 if (NULL == new_node) in __idr_grow()
140 if (new_node != NULL) // 设置第0位 = 1, 同时维护树的大小 in __idr_grow()
144 if (new_node != NULL && new_node->full == IDR_FULL) in __idr_grow()
162 while (NULL == idp->top || idp->top->full == IDR_FULL) in __idr_get_empty_slot()
169 stk[layer + 1] = NULL; // 标志为数组末尾 in __idr_get_empty_slot()
186 if (layer > 0 && NULL == cur_layer) // 只有非叶子节点才需要开辟儿子节点 in __idr_get_empty_slot()
[all …]
Dmutex.c42 if (waiter == NULL) in mutex_lock()
77 struct mutex_waiter_t *wt = NULL; in mutex_unlock()
84 if (wt != NULL) in mutex_unlock()
90 if (wt != NULL) in mutex_unlock()
Dwait_queue_head.c24 BUG_ON(wait->pcb == NULL); in wait_queue_sleep_with_node()
39 BUG_ON(wait->pcb == NULL); in wait_queue_sleep_with_node_unlock()
55 BUG_ON(wait->pcb == NULL); in wait_queue_sleep_with_node_interriptible()
Dkfifo.c19 if (fifo->buffer == NULL) in kfifo_alloc()
56 if (unlikely(from == NULL)) in kfifo_in()
88 if (unlikely(to == NULL)) // 判断目标地址是否为空 in kfifo_out()
122 if (unlikely(to == NULL)) // 判断目标地址是否为空 in kfifo_out_peek()
/DragonOS-0.1.8/user/libs/libc/src/
Dmalloc.c43 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()
[all …]
Ddirent.c22 return NULL; in opendir()
77 return NULL; in readdir()
/DragonOS-0.1.8/kernel/src/libs/libUI/
Dscreen_manager.c33 if (buf == NULL) in __create_buffer()
48 if (buf_vaddr == NULL) in __create_buffer()
66 if (unlikely(buf == &video_frame_buffer_info || buf == NULL)) in __destroy_buffer()
68 if (unlikely(buf->vaddr == NULL)) in __destroy_buffer()
94 __current_framework = NULL; in scm_init()
106 if (name == NULL) in __check_ui_param()
110 if (ops == NULL) in __check_ui_param()
112 …if (ops->install == NULL || ops->uninstall == NULL || ops->enable == NULL || ops->disable == NULL … in __check_ui_param()
113 ops->change == NULL) in __check_ui_param()
159 ui->ui_ops->enable(NULL); in scm_register_alloc()
[all …]
/DragonOS-0.1.8/kernel/src/ktest/
Dtest-idr.c29 assert(k_idr.top == NULL); // 刚被创建,必须是NULL in ktest_idr_case0()
31 assert(k_idr.free_list == NULL); in ktest_idr_case0()
55 assert(k_idr.free_list == NULL); in ktest_idr_case0()
56 assert(k_idr.top == NULL); in ktest_idr_case0()
84 assert(ptr != NULL); in ktest_idr_case1()
92 assert(id != NULL); in ktest_idr_case1()
94 assert(idr_find(&k_idr, a[i]) == NULL); in ktest_idr_case1()
101 assert(id != NULL); in ktest_idr_case1()
103 assert(idr_find(&k_idr, a[i]) == NULL); in ktest_idr_case1()
127 assert(id != NULL); in ktest_idr_case1()
[all …]
Dtest-bitree.c42 struct bt_node_t *rn = bt_create_node(NULL, NULL, NULL, tv1); in ktest_bitree_case1()
44 assert(rn != NULL); in ktest_bitree_case1()
49 assert(tree != NULL); in ktest_bitree_case1()
57 assert(tv2 != NULL); in ktest_bitree_case1()
66 assert(tv3 != NULL); in ktest_bitree_case1()
83 assert(node2 != NULL); in ktest_bitree_case1()
88 assert(tv4 != NULL); in ktest_bitree_case1()
102 assert(tv_not_exists != NULL); in ktest_bitree_case1()
106 assert(node_not_exists == NULL); in ktest_bitree_case1()
111 assert(tree->bt_node->right == NULL); in ktest_bitree_case1()
/DragonOS-0.1.8/kernel/src/driver/pci/
Dpci_irq.c31 irq_desc_t *p = NULL; in c_irq_install()
41 if(p->irq_name!=NULL) in c_irq_install()
67 irq_desc_t *p = NULL; in c_irq_uninstall()
76 if(p->irq_name!=NULL) in c_irq_uninstall()
79 p->irq_name = NULL; in c_irq_uninstall()
81 if(p->controller!=NULL) in c_irq_uninstall()
84 p->controller = NULL; in c_irq_uninstall()
87 p->handler = NULL; in c_irq_uninstall()
/DragonOS-0.1.8/kernel/src/driver/hid/
Dhidstrings.c1538 {0x0000, NULL, "Undefined"},
1547 {0x0009, NULL, "Button"},
1548 {0x000A, NULL, "Ordinal"},
1553 {0x0010, NULL, "Unicode"},
1557 {0x0081, NULL, "Monitor Pages"},
1575 {0xFFFF, NULL, ""},
/DragonOS-0.1.8/user/apps/test_sqlite3/
Dmain.c10 NotUsed = NULL; in callback()
24 char *errmsg = NULL; in exec()
25 int rc = sqlite3_exec(db, sql, NULL, NULL, &errmsg); in exec()
34 char *errmsg = NULL; in query()
35 int rc = sqlite3_exec(db, sql, callback, NULL, &errmsg); in query()
/DragonOS-0.1.8/kernel/src/driver/video/
Dvideo.c23 static struct scm_buffer_info_t *video_refresh_target = NULL;
24 static struct process_control_block *video_daemon_pcb = NULL;
59 if (likely(video_refresh_target != NULL)) in video_refresh_daemon()
62 if (video_frame_buffer_info.vaddr != NULL) in video_refresh_daemon()
84 if (unlikely(video_daemon_pcb == NULL)) in video_refresh_framebuffer()
111 video_daemon_pcb = kthread_run(&video_refresh_daemon, NULL, "Video refresh daemon"); in video_reinitialize()
156 video_refresh_target = NULL; in video_init()
/DragonOS-0.1.8/user/libs/libc/src/include/export/
Dstddef.h6 #define NULL 0 macro
8 #define NULL ((void *)0) macro
/DragonOS-0.1.8/kernel/src/syscall/
Dsyscall.c88 struct process_control_block *proc = NULL; in c_sys_wait4()
89 struct process_control_block *child_proc = NULL; in c_sys_wait4()
97 if (child_proc == NULL) in c_sys_wait4()
111 if (likely(status != NULL)) in c_sys_wait4()
/DragonOS-0.1.8/user/apps/shell/
Dcmd.c18 char *shell_current_path = NULL;
53 char *file_path = NULL; in get_target_filepath()
259 if (dir == NULL) in shell_cmd_ls()
262 struct dirent *buf = NULL; in shell_cmd_ls()
268 if (buf == NULL) in shell_cmd_ls()
287 if (argv != NULL) in shell_cmd_ls()
304 if (argv != NULL) in shell_cmd_pwd()
352 if (argv != NULL) in shell_cmd_cat()
389 if (argv != NULL) in shell_cmd_touch()
406 char *full_path = NULL; in shell_cmd_mkdir()
[all …]
/DragonOS-0.1.8/kernel/src/process/
Dkthread.c10 struct process_control_block *kthreadd_pcb = NULL; // kthreadd守护线程的pcb
53 struct process_control_block *pcb = NULL; in __kthread_create_on_node()
56 if (create == NULL) in __kthread_create_on_node()
58 BUG_ON(name_fmt == NULL); in __kthread_create_on_node()
63 create->result = NULL; in __kthread_create_on_node()
72 while (kthreadd_pcb == NULL) // 若kthreadd未初始化，则等待kthreadd启动 in __kthread_create_on_node()
80 while (create->result == NULL) in __kthread_create_on_node()
304 if (kt == NULL) in kthread_set_worker_private()
321 kernel_thread(kthreadd, NULL, CLONE_FS | CLONE_SIGNAL); in kthread_mechanism_init()
338 pcb->worker_private = NULL; in free_kthread_struct()
Dprocess.c60 ….wait_child_proc_exit = 0, .worker_private = NULL, .policy = SCHED_NORMAL, .sig_blocked = 0, …
61 ….signal = &INITIAL_SIGNALS, .sighand = &INITIAL_SIGHAND, .address_space = NULL …
224 "m"(current_pcb->thread->rsp), "m"(current_pcb->thread->rip), "c"(NULL), in initial_kernel_thread()
225 "d"(NULL) in initial_kernel_thread()
331 wait_queue_init(&initial_proc_union.pcb.wait_child_proc_exit, NULL); in process_init()
377 return NULL; in process_find_pcb_by_pid()
391 BUG_ON(pcb == NULL); in process_wakeup()
392 if (pcb == NULL) in process_wakeup()
/DragonOS-0.1.8/kernel/src/common/
Dlist.h78 if (old->prev != NULL) in list_replace()
81 if (old->next != NULL) in list_replace()
85 old->prev = NULL; in list_replace()
86 old->next = NULL; in list_replace()
110 if (entry->prev != NULL) in list_prev()
113 return NULL; in list_prev()
124 if (entry->next != NULL) in list_next()
127 return NULL; in list_next()
157 …_entry_or_null(ptr, type, member) (!list_empty(ptr) ? list_entry((ptr)->next, type, member) : NULL)
177 …_entry_or_full(ptr, type, member) (!list_empty(ptr) ? list_entry((ptr)->prev, type, member) : NULL)
/DragonOS-0.1.8/kernel/src/exception/
Dirq.c192 irq_desc_t *p = NULL; in irq_register()
203 if (p->irq_name == NULL) in irq_register()
235 p->controller = NULL; in irq_unregister()
238 p->irq_name = NULL; in irq_unregister()
239 p->parameter = NULL; in irq_unregister()
241 p->handler = NULL; in irq_unregister()
/DragonOS-0.1.8/user/apps/http_server/
Dmain.c124 url = strtok(NULL, " "); in handle_request()
125 http_version = strtok(NULL, "\r\n"); in handle_request()
129 if (method == NULL || url == NULL || http_version == NULL) in handle_request()
/DragonOS-0.1.8/kernel/src/smp/
Dsmp.c69 ipi_regiserIPI(KICK_CPU_IRQ_NUM, NULL, &__smp_kick_cpu_handler, NULL, NULL, "IPI kick cpu"); in smp_init()
70 …ipi_regiserIPI(FLUSH_TLB_IRQ_NUM, NULL, &__smp__flush_tlb_ipi_handler, NULL, NULL, "IPI flush tlb"… in smp_init()
177 current_pcb->address_space = NULL; in smp_ap_start()
/DragonOS-0.1.8/kernel/src/time/
Dclocksource.c7 kthread_run(rs_clocksource_watchdog_kthread, NULL, "clocksource_watchdog"); in run_watchdog_kthread()
/DragonOS-0.1.8/docs/kernel/core_api/
Ddata_structures.md453    调用这个函数，需要您保证ptr是非空的，即: `ptr != NULL`, 否则将会影响 `idr_find/idr_find_next/idr_find_next_get…
479    如果该ID不存在, 该函数不会产生异常错误, 因为在检测到该ID不存在的时候, 函数将会自动退出，并返回NULL。
492   如果删除成功，就返回被删除id所对应的ptr；否则返回NULL。注意：如果这个id本来就和NULL绑定，那么也会返回NULL
550    如果分配,将返回该ID对应的数据指针; 否则返回NULL.(注意， 返回NULL不一定代表这ID不存在，有可能该ID就是与空指针绑定。)
571    如果分配,将返回该ID对应的数据指针; 否则返回NULL.(注意， 返回NULL不一定代表这ID不存在，有可能该ID就是与空指针绑定。)
593    如果分配,将返回该ID对应的数据指针; 否则返回NULL.(注意， 返回NULL不一定代表这ID不存在，有可能该ID就是与空指针绑定。)

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