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Vector Packet Processing
vat_helper_macros.h
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1 /*
2  *------------------------------------------------------------------
3  * vat_helper_macros.h - collect api client helper macros in one place
4  *
5  * Copyright (c) 2016 Cisco and/or its affiliates.
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at:
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  *------------------------------------------------------------------
18  */
19 #ifndef __vat_helper_macros_h__
20 #define __vat_helper_macros_h__
21 
22 /* M: construct, but don't yet send a message */
23 #define M(T, mp) \
24 do { \
25  vam->result_ready = 0; \
26  mp = vl_msg_api_alloc_as_if_client(sizeof(*mp)); \
27  memset (mp, 0, sizeof (*mp)); \
28  mp->_vl_msg_id = ntohs (VL_API_##T+__plugin_msg_base); \
29  mp->client_index = vam->my_client_index; \
30 } while(0);
31 
32 #define M2(T, mp, n) \
33 do { \
34  vam->result_ready = 0; \
35  mp = vl_msg_api_alloc_as_if_client(sizeof(*mp)+(n)); \
36  memset (mp, 0, sizeof (*mp)); \
37  mp->_vl_msg_id = ntohs (VL_API_##T+__plugin_msg_base); \
38  mp->client_index = vam->my_client_index; \
39 } while(0);
40 
41 /* S: send a message */
42 #define S(mp) (vl_msg_api_send_shmem (vam->vl_input_queue, (u8 *)&mp))
43 
44 /* W: wait for results, with timeout */
45 #define W(ret) \
46 do { \
47  f64 timeout = vat_time_now (vam) + 1.0; \
48  ret = -99; \
49  \
50  while (vat_time_now (vam) < timeout) { \
51  if (vam->result_ready == 1) { \
52  ret = vam->retval; \
53  break; \
54  } \
55  vat_suspend (vam->vlib_main, 1e-5); \
56  } \
57 } while(0);
58 
59 /* W2: wait for results, with timeout */
60 #define W2(ret, body) \
61 do { \
62  f64 timeout = vat_time_now (vam) + 1.0; \
63  ret = -99; \
64  \
65  while (vat_time_now (vam) < timeout) { \
66  if (vam->result_ready == 1) { \
67  (body); \
68  ret = vam->retval; \
69  break; \
70  } \
71  vat_suspend (vam->vlib_main, 1e-5); \
72  } \
73 } while(0);
74 
75 
76 #endif /* __vat_helper_macros_h__ */