1 /*
2  * Copyright (C) 2016 YunOS Project. All rights reserved.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *   http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef MBOX_H
18 #define MBOX_H
19 
20 #if defined(__cplusplus)
21 extern "C"
22 {
23 #endif
24 
25 #define K_MBOX_SIZE 128
26 
27 #define SYS_ARCH_TIMEOUT 0xffffffffUL
28 #define SYS_MBOX_EMPTY SYS_ARCH_TIMEOUT
29 
30 typedef struct k_mbox {
31     int first, last;
32     void *msgs[K_MBOX_SIZE];
33     struct k_sem not_empty;
34     struct k_sem not_full;
35     struct k_sem mutex;
36     int wait_send;
37 } k_mbox_t;
38 
39 int k_mbox_new(k_mbox_t **mb, int size);
40 void k_mbox_free(k_mbox_t *mb);
41 void k_mbox_post(k_mbox_t *mb, void *msg);
42 int k_mbox_trypost(k_mbox_t *mb, void *msg);
43 int k_mbox_fetch(k_mbox_t *mb, void **msg, uint32_t timeout);
44 int k_mbox_tryfetch(k_mbox_t *mb, void **msg);
45 
46 #ifdef __cplusplus
47 }
48 #endif
49 
50 #endif /* MBOX_H */
51 
52