GCC Code Coverage Report

Directory: ./
File: Types/CircularBuffer.cpp
Date: 2026-09-03 22:14:09
Exec Total Coverage
Lines: 92 144 63.9%
Functions: 16 24 66.7%
Branches: 25 51 49.0%
Line Branch Exec Source
1 /*
2 * CircularBuffer.cpp:
3 *
4 * Buffer used to efficiently store data in ring data structure. Uses an externally supplied
5 * data store as the backing for this buffer. Thus it is dependent on receiving sole ownership
6 * of the supplied buffer.
7 *
8 * This implementation file contains the function definitions.
9 *
10 * Created on: Apr 4, 2019
11 * Author: lestarch
12 * Revised March 2022
13 * Author: bocchino
14 */
15 #include <Fw/FPrimeBasicTypes.hpp>
16 #include <Fw/Types/Assert.hpp>
17 #include <Utils/Types/CircularBuffer.hpp>
18
19 namespace Types {
20
21 4 CircularBuffer ::CircularBuffer()
22 4 : m_store(nullptr), m_store_size(0), m_head_idx(0), m_allocated_size(0), m_high_water_mark(0) {}
23
24 ✗ CircularBuffer ::CircularBuffer(U8* const buffer, const FwSizeType size)
25 ✗ : m_store(nullptr), m_store_size(0), m_head_idx(0), m_allocated_size(0), m_high_water_mark(0) {
26 ✗ setup(buffer, size);
27 ✗ }
28
29 4 void CircularBuffer ::setup(U8* const buffer, const FwSizeType size) {
30 4 FW_ASSERT(size > 0);
31 4 FW_ASSERT(buffer != nullptr);
32 4 FW_ASSERT(m_store == nullptr && m_store_size == 0); // Not already setup
33
34 // Initialize buffer data
35 4 m_store = buffer;
36 4 m_store_size = size;
37 4 m_head_idx = 0;
38 4 m_allocated_size = 0;
39 4 m_high_water_mark = 0;
40 4 }
41
42 27038 FwSizeType CircularBuffer ::get_allocated_size() const {
43 27038 return m_allocated_size;
44 }
45
46 2510 FwSizeType CircularBuffer ::get_free_size() const {
47 2510 FW_ASSERT(m_store != nullptr && m_store_size != 0); // setup method was called
48 2510 FW_ASSERT(m_allocated_size <= m_store_size, static_cast<FwAssertArgType>(m_allocated_size));
49 2510 return m_store_size - m_allocated_size;
50 }
51
52 58703 FwSizeType CircularBuffer ::advance_idx(FwSizeType idx, FwSizeType amount) const {
53 58703 FW_ASSERT(idx < m_store_size, static_cast<FwAssertArgType>(idx));
54 58703 return (idx + amount) % m_store_size;
55 }
56
57 614 Fw::SerializeStatus CircularBuffer ::serialize(const U8* const buffer, const FwSizeType size) {
58 614 FW_ASSERT(m_store != nullptr && m_store_size != 0); // setup method was called
59 614 FW_ASSERT(buffer != nullptr);
60 // Check there is sufficient space
61
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 614 if (size > get_free_size()) {
62 ✗ return Fw::FW_SERIALIZE_NO_ROOM_LEFT;
63 }
64 // Copy in all the supplied data
65 614 FwSizeType idx = advance_idx(m_head_idx, m_allocated_size);
66
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 9485 for (FwSizeType i = 0; i < size; i++) {
67 8871 FW_ASSERT(idx < m_store_size, static_cast<FwAssertArgType>(idx));
68 8871 m_store[idx] = buffer[i];
69 8871 idx = advance_idx(idx);
70 }
71 614 m_allocated_size += size;
72 614 FW_ASSERT(m_allocated_size <= this->get_capacity(), static_cast<FwAssertArgType>(m_allocated_size));
73
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 614 m_high_water_mark = (m_high_water_mark > m_allocated_size) ? m_high_water_mark : m_allocated_size;
74 614 return Fw::FW_SERIALIZE_OK;
75 }
76
77 template <typename T>
78 1336 Fw::SerializeStatus CircularBuffer ::serialize_impl(const T& serializable, const FwSizeType size) {
79 1336 FW_ASSERT(m_store != nullptr && m_store_size != 0); // setup method was called
80 // Check there is sufficient space
81
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 1336 if (size > get_free_size()) {
82 ✗ return Fw::FW_SERIALIZE_NO_ROOM_LEFT;
83 }
84
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 1336 const FwSizeType idx = advance_idx(m_head_idx, m_allocated_size);
85 // Wrapping slot: serialize into a stack staging buffer, then byte-copy in with wrap-around
86
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 1336 if ((idx + size) > m_store_size) {
87 ✗ FW_ASSERT(size <= STAGING_BUFFER_SIZE, static_cast<FwAssertArgType>(size),
88 static_cast<FwAssertArgType>(STAGING_BUFFER_SIZE));
89 ✗ U8 staging[STAGING_BUFFER_SIZE > 0 ? STAGING_BUFFER_SIZE : 1] = {};
90 ✗ Fw::ExternalSerializeBuffer stagingBuffer(staging, size);
91 ✗ const Fw::SerializeStatus stagingStatus = stagingBuffer.serializeFrom(serializable);
92 ✗ if (stagingStatus != Fw::FW_SERIALIZE_OK) {
93 ✗ return stagingStatus;
94 }
95 ✗ return this->serialize(staging, size);
96 ✗ }
97 // Linear slot: serialize directly into the store
98
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 1336 Fw::ExternalSerializeBuffer slot(&m_store[idx], size);
99
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 1336 const Fw::SerializeStatus status = slot.serializeFrom(serializable);
100
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 1336 if (status != Fw::FW_SERIALIZE_OK) {
101 ✗ return status;
102 }
103 1336 m_allocated_size += size;
104 1336 FW_ASSERT(m_allocated_size <= this->get_capacity(), static_cast<FwAssertArgType>(m_allocated_size));
105
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 1336 m_high_water_mark = (m_high_water_mark > m_allocated_size) ? m_high_water_mark : m_allocated_size;
106 1336 return Fw::FW_SERIALIZE_OK;
107 1336 }
108
109 ✗ Fw::SerializeStatus CircularBuffer ::serialize(const Fw::Serializable& serializable, const FwSizeType size) {
110 ✗ return this->serialize_impl(serializable, size);
111 }
112
113 668 Fw::SerializeStatus CircularBuffer ::serialize(const Fw::LinearBufferBase& buffer, const FwSizeType size) {
114 668 return this->serialize_impl(buffer, size);
115 }
116
117 ✗ Fw::SerializeStatus CircularBuffer ::peek(char& value, FwSizeType offset) const {
118 ✗ FW_ASSERT(m_store != nullptr && m_store_size != 0); // setup method was called
119 ✗ return peek(reinterpret_cast<U8&>(value), offset);
120 }
121
122 2939 Fw::SerializeStatus CircularBuffer ::peek(U8& value, FwSizeType offset) const {
123 2939 FW_ASSERT(m_store != nullptr && m_store_size != 0); // setup method was called
124 // Check there is sufficient data
125
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 2939 if ((sizeof(U8) + offset) > m_allocated_size) {
126 ✗ return Fw::FW_DESERIALIZE_BUFFER_EMPTY;
127 }
128 2939 const FwSizeType idx = advance_idx(m_head_idx, offset);
129 2939 FW_ASSERT(idx < m_store_size, static_cast<FwAssertArgType>(idx));
130 2939 value = m_store[idx];
131 2939 return Fw::FW_SERIALIZE_OK;
132 }
133
134 ✗ Fw::SerializeStatus CircularBuffer ::peek(U32& value, FwSizeType offset) const {
135 ✗ FW_ASSERT(m_store != nullptr && m_store_size != 0); // setup method was called
136 // Check there is sufficient data
137 ✗ if ((sizeof(U32) + offset) > m_allocated_size) {
138 ✗ return Fw::FW_DESERIALIZE_BUFFER_EMPTY;
139 }
140 ✗ value = 0;
141 ✗ FwSizeType idx = advance_idx(m_head_idx, offset);
142
143 // Deserialize all the bytes from network format
144 ✗ for (FwSizeType i = 0; i < sizeof(U32); i++) {
145 ✗ FW_ASSERT(idx < m_store_size, static_cast<FwAssertArgType>(idx));
146 ✗ value = (value << 8) | static_cast<U32>(m_store[idx]);
147 ✗ idx = advance_idx(idx);
148 }
149 ✗ return Fw::FW_SERIALIZE_OK;
150 }
151
152 6072 Fw::SerializeStatus CircularBuffer ::peek(U8* buffer, FwSizeType size, FwSizeType offset) const {
153 6072 FW_ASSERT(m_store != nullptr && m_store_size != 0); // setup method was called
154 6072 FW_ASSERT(buffer != nullptr);
155 // Check there is sufficient data
156
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 6072 if ((size + offset) > m_allocated_size) {
157 ✗ return Fw::FW_DESERIALIZE_BUFFER_EMPTY;
158 }
159 6072 FwSizeType idx = advance_idx(m_head_idx, offset);
160 // Deserialize all the bytes from network format
161
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 38495 for (FwSizeType i = 0; i < size; i++) {
162 32423 FW_ASSERT(idx < m_store_size, static_cast<FwAssertArgType>(idx));
163 32423 buffer[i] = m_store[idx];
164 32423 idx = advance_idx(idx);
165 }
166 6072 return Fw::FW_SERIALIZE_OK;
167 }
168
169 template <typename T>
170 1336 Fw::SerializeStatus CircularBuffer ::peek_impl(T& serializable, FwSizeType size, FwSizeType offset) const {
171 1336 FW_ASSERT(m_store != nullptr && m_store_size != 0); // setup method was called
172 // Check there is sufficient data
173
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 1336 if ((size + offset) > m_allocated_size) {
174 ✗ return Fw::FW_DESERIALIZE_BUFFER_EMPTY;
175 }
176
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 1336 const FwSizeType idx = advance_idx(m_head_idx, offset);
177 // Wrapping slot: byte-copy out with wrap-around into a stack staging buffer, then deserialize
178
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 1336 if ((idx + size) > m_store_size) {
179 ✗ FW_ASSERT(size <= STAGING_BUFFER_SIZE, static_cast<FwAssertArgType>(size),
180 static_cast<FwAssertArgType>(STAGING_BUFFER_SIZE));
181 U8 staging[STAGING_BUFFER_SIZE > 0 ? STAGING_BUFFER_SIZE : 1];
182 ✗ const Fw::SerializeStatus peekStatus = this->peek(staging, size, offset);
183 ✗ if (peekStatus != Fw::FW_SERIALIZE_OK) {
184 ✗ return peekStatus;
185 }
186 ✗ Fw::ExternalSerializeBuffer stagingBuffer(staging, size);
187 ✗ const Fw::SerializeStatus status = stagingBuffer.setBuffLen(size);
188 ✗ FW_ASSERT(status == Fw::FW_SERIALIZE_OK, static_cast<FwAssertArgType>(status));
189 ✗ return stagingBuffer.deserializeTo(serializable);
190 ✗ }
191 // Linear slot: deserialize directly from the store
192
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 1336 Fw::ExternalSerializeBuffer slot(&m_store[idx], size);
193
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 1336 Fw::SerializeStatus status = slot.setBuffLen(size);
194 1336 FW_ASSERT(status == Fw::FW_SERIALIZE_OK, static_cast<FwAssertArgType>(status));
195
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 1336 return slot.deserializeTo(serializable);
196 1336 }
197
198 ✗ Fw::SerializeStatus CircularBuffer ::peek(Fw::Serializable& serializable, FwSizeType size, FwSizeType offset) const {
199 ✗ return this->peek_impl(serializable, size, offset);
200 }
201
202 668 Fw::SerializeStatus CircularBuffer ::peek(Fw::LinearBufferBase& buffer, FwSizeType size, FwSizeType offset) const {
203 668 return this->peek_impl(buffer, size, offset);
204 }
205
206 6448 Fw::SerializeStatus CircularBuffer ::rotate(FwSizeType amount) {
207 6448 FW_ASSERT(m_store != nullptr && m_store_size != 0); // setup method was called
208 // Check there is sufficient data
209
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 6448 if (amount > m_allocated_size) {
210 ✗ return Fw::FW_DESERIALIZE_BUFFER_EMPTY;
211 }
212 6448 m_head_idx = advance_idx(m_head_idx, amount);
213 6448 m_allocated_size -= amount;
214 6448 return Fw::FW_SERIALIZE_OK;
215 }
216
217 ✗ Fw::SerializeStatus CircularBuffer ::trim(FwSizeType amount) {
218 ✗ FW_ASSERT(m_store != nullptr && m_store_size != 0); // setup method was called
219 // Check there is sufficient data
220 ✗ if (amount > m_allocated_size) {
221 ✗ return Fw::FW_DESERIALIZE_BUFFER_EMPTY;
222 }
223 // Simply reduce the allocated size without moving the head
224 ✗ m_allocated_size -= amount;
225 ✗ return Fw::FW_SERIALIZE_OK;
226 }
227
228 1896 FwSizeType CircularBuffer ::get_capacity() const {
229 1896 FW_ASSERT(m_store != nullptr && m_store_size != 0); // setup method was called
230 1896 return m_store_size;
231 }
232
233 705 FwSizeType CircularBuffer ::get_high_water_mark() const {
234 705 return m_high_water_mark;
235 }
236
237 705 void CircularBuffer ::clear_high_water_mark() {
238 705 m_high_water_mark = 0;
239 705 }
240
241 } // End Namespace Types
242