ChibiOS/HAL  7.0.3
nullstreams.h
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1 /*
2  ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
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 /**
18  * @file nullstreams.h
19  * @brief Null streams structures and macros.
20 
21  * @addtogroup HAL_NULL_STREAMS
22  * @{
23  */
24 
25 #ifndef NULLSTREAMS_H
26 #define NULLSTREAMS_H
27 
28 /*===========================================================================*/
29 /* Driver constants. */
30 /*===========================================================================*/
31 
32 /*===========================================================================*/
33 /* Driver pre-compile time settings. */
34 /*===========================================================================*/
35 
36 /*===========================================================================*/
37 /* Derived constants and error checks. */
38 /*===========================================================================*/
39 
40 /*===========================================================================*/
41 /* Driver data structures and types. */
42 /*===========================================================================*/
43 
44 /**
45  * @brief @p NullStream specific data.
46  */
47 #define _null_stream_data \
48  _base_sequential_stream_data
49 
50 /**
51  * @brief @p NullStream virtual methods table.
52  */
53 struct NullStreamVMT {
54  _base_sequential_stream_methods
55 };
56 
57 /**
58  * @extends BaseSequentialStream
59  *
60  * @brief Null stream object.
61  */
62 typedef struct {
63  /** @brief Virtual Methods Table.*/
64  const struct NullStreamVMT *vmt;
65  _null_stream_data
66 } NullStream;
67 
68 /*===========================================================================*/
69 /* Driver macros. */
70 /*===========================================================================*/
71 
72 /*===========================================================================*/
73 /* External declarations. */
74 /*===========================================================================*/
75 
76 #ifdef __cplusplus
77 extern "C" {
78 #endif
79  void nullObjectInit(NullStream *nsp);
80 #ifdef __cplusplus
81 }
82 #endif
83 
84 #endif /* NULLSTREAMS_H */
85 
86 /** @} */
nullObjectInit
void nullObjectInit(NullStream *nsp)
Null stream object initialization.
Definition: nullstreams.c:88
_base_sequential_stream_methods
#define _base_sequential_stream_methods
BaseSequentialStream specific methods.
Definition: hal_streams.h:50
NullStreamVMT
NullStream virtual methods table.
Definition: nullstreams.h:53
NullStream::vmt
const struct NullStreamVMT * vmt
Virtual Methods Table.
Definition: nullstreams.h:64
NullStream
Null stream object.
Definition: nullstreams.h:62
_null_stream_data
#define _null_stream_data
NullStream specific data.
Definition: nullstreams.h:47