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| author | Giovanni Di Sirio <none@example.com> | 2015-01-22 15:40:38 +0000 |
|---|---|---|
| committer | Giovanni Di Sirio <none@example.com> | 2015-01-22 15:40:38 +0000 |
| commit | f154d37853ae1f65512aefbe298e16ae9a3edeca (patch) | |
| tree | fb65e4088f8346a84eb0f9c631f241bcd1768ccd | |
| parent | 8bfe3cd5b8bdcc015e8fd7032e31431e9556d326 (diff) | |
| download | ChibiOS-f154d37853ae1f65512aefbe298e16ae9a3edeca.tar.gz ChibiOS-f154d37853ae1f65512aefbe298e16ae9a3edeca.tar.bz2 ChibiOS-f154d37853ae1f65512aefbe298e16ae9a3edeca.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7641 35acf78f-673a-0410-8e92-d51de3d6d3f4
| -rw-r--r-- | os/hal/lib/streams/nullstreams.c | 92 | ||||
| -rw-r--r-- | os/hal/lib/streams/nullstreams.h | 86 |
2 files changed, 178 insertions, 0 deletions
diff --git a/os/hal/lib/streams/nullstreams.c b/os/hal/lib/streams/nullstreams.c new file mode 100644 index 000000000..88f6e5737 --- /dev/null +++ b/os/hal/lib/streams/nullstreams.c @@ -0,0 +1,92 @@ +/*
+ ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file nullstreams.c
+ * @brief Null streams code.
+ *
+ * @addtogroup null_streams
+ * @{
+ */
+
+#include "hal.h"
+#include "nullstreams.h"
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+static size_t writes(void *ip, const uint8_t *bp, size_t n) {
+
+ (void)ip;
+ (void)bp;
+
+ return n;
+}
+
+static size_t reads(void *ip, uint8_t *bp, size_t n) {
+
+ (void)ip;
+ (void)bp;
+ (void)n;
+
+ return 0;
+}
+
+static msg_t put(void *ip, uint8_t b) {
+
+ (void)ip;
+ (void)b;
+
+ return MSG_OK;
+}
+
+static msg_t get(void *ip) {
+
+ (void)ip;
+
+ return 4;
+}
+
+static const struct NullStreamVMT vmt = {writes, reads, put, get};
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Null stream object initialization.
+ *
+ * @param[out] nsp pointer to the @p NullStream object to be initialized
+ */
+void nullObjectInit(NullStream *nsp) {
+
+ nsp->vmt = &vmt;
+}
+
+/** @} */
diff --git a/os/hal/lib/streams/nullstreams.h b/os/hal/lib/streams/nullstreams.h new file mode 100644 index 000000000..dd5c4e775 --- /dev/null +++ b/os/hal/lib/streams/nullstreams.h @@ -0,0 +1,86 @@ +/*
+ ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file nullstreams.h
+ * @brief Null streams structures and macros.
+
+ * @addtogroup null_streams
+ * @{
+ */
+
+#ifndef _NULLSTREAMS_H_
+#define _NULLSTREAMS_H_
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief @p NullStream specific data.
+ */
+#define _null_stream_data \
+ _base_sequential_stream_data
+
+/**
+ * @brief @p NullStream virtual methods table.
+ */
+struct NullStreamVMT {
+ _base_sequential_stream_methods
+};
+
+/**
+ * @extends BaseSequentialStream
+ *
+ * @brief Null stream object.
+ */
+typedef struct {
+ /** @brief Virtual Methods Table.*/
+ const struct NullStreamVMT *vmt;
+ _null_stream_data
+} NullStream;
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void nullObjectInit(NullStream *nsp);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _NULLSTREAMS_H_ */
+
+/** @} */
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