Yao Chen | b13a102 | 2018-05-07 16:57:13 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018, The Android Open Source Project |
| 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 ANDROID_STATS_LOG_STATS_EVENT_LIST_H |
| 18 | #define ANDROID_STATS_LOG_STATS_EVENT_LIST_H |
| 19 | |
| 20 | #include <log/log_event_list.h> |
| 21 | |
| 22 | #ifdef __cplusplus |
| 23 | extern "C" { |
| 24 | #endif |
| 25 | void reset_log_context(android_log_context ctx); |
| 26 | int write_to_logger(android_log_context context, log_id_t id); |
| 27 | |
| 28 | #ifdef __cplusplus |
| 29 | } |
| 30 | #endif |
| 31 | |
| 32 | #ifdef __cplusplus |
| 33 | /** |
| 34 | * A copy of android_log_event_list class. |
| 35 | * |
| 36 | * android_log_event_list is going to be deprecated soon, so copy it here to |
| 37 | * avoid creating dependency on upstream code. TODO(b/78304629): Rewrite this |
| 38 | * code. |
| 39 | */ |
| 40 | class stats_event_list { |
| 41 | private: |
| 42 | android_log_context ctx; |
| 43 | int ret; |
| 44 | |
| 45 | stats_event_list(const stats_event_list&) = delete; |
| 46 | void operator=(const stats_event_list&) = delete; |
| 47 | |
| 48 | public: |
| 49 | explicit stats_event_list(int tag) : ret(0) { |
| 50 | ctx = create_android_logger(static_cast<uint32_t>(tag)); |
| 51 | } |
| 52 | explicit stats_event_list(log_msg& log_msg) : ret(0) { |
| 53 | ctx = create_android_log_parser(log_msg.msg() + sizeof(uint32_t), |
| 54 | log_msg.entry.len - sizeof(uint32_t)); |
| 55 | } |
| 56 | ~stats_event_list() { android_log_destroy(&ctx); } |
| 57 | |
| 58 | int close() { |
| 59 | int retval = android_log_destroy(&ctx); |
| 60 | if (retval < 0) { |
| 61 | ret = retval; |
| 62 | } |
| 63 | return retval; |
| 64 | } |
| 65 | |
| 66 | /* To allow above C calls to use this class as parameter */ |
| 67 | operator android_log_context() const { return ctx; } |
| 68 | |
| 69 | /* return errors or transmit status */ |
| 70 | int status() const { return ret; } |
| 71 | |
| 72 | int begin() { |
| 73 | int retval = android_log_write_list_begin(ctx); |
| 74 | if (retval < 0) { |
| 75 | ret = retval; |
| 76 | } |
| 77 | return ret; |
| 78 | } |
| 79 | int end() { |
| 80 | int retval = android_log_write_list_end(ctx); |
| 81 | if (retval < 0) { |
| 82 | ret = retval; |
| 83 | } |
| 84 | return ret; |
| 85 | } |
| 86 | |
| 87 | stats_event_list& operator<<(int32_t value) { |
| 88 | int retval = android_log_write_int32(ctx, value); |
| 89 | if (retval < 0) { |
| 90 | ret = retval; |
| 91 | } |
| 92 | return *this; |
| 93 | } |
| 94 | |
| 95 | stats_event_list& operator<<(uint32_t value) { |
| 96 | int retval = android_log_write_int32(ctx, static_cast<int32_t>(value)); |
| 97 | if (retval < 0) { |
| 98 | ret = retval; |
| 99 | } |
| 100 | return *this; |
| 101 | } |
| 102 | |
| 103 | stats_event_list& operator<<(bool value) { |
| 104 | int retval = android_log_write_int32(ctx, value ? 1 : 0); |
| 105 | if (retval < 0) { |
| 106 | ret = retval; |
| 107 | } |
| 108 | return *this; |
| 109 | } |
| 110 | |
| 111 | stats_event_list& operator<<(int64_t value) { |
| 112 | int retval = android_log_write_int64(ctx, value); |
| 113 | if (retval < 0) { |
| 114 | ret = retval; |
| 115 | } |
| 116 | return *this; |
| 117 | } |
| 118 | |
| 119 | stats_event_list& operator<<(uint64_t value) { |
| 120 | int retval = android_log_write_int64(ctx, static_cast<int64_t>(value)); |
| 121 | if (retval < 0) { |
| 122 | ret = retval; |
| 123 | } |
| 124 | return *this; |
| 125 | } |
| 126 | |
| 127 | stats_event_list& operator<<(const char* value) { |
| 128 | int retval = android_log_write_string8(ctx, value); |
| 129 | if (retval < 0) { |
| 130 | ret = retval; |
| 131 | } |
| 132 | return *this; |
| 133 | } |
| 134 | |
| 135 | #if defined(_USING_LIBCXX) |
| 136 | stats_event_list& operator<<(const std::string& value) { |
| 137 | int retval = android_log_write_string8_len(ctx, value.data(), value.length()); |
| 138 | if (retval < 0) { |
| 139 | ret = retval; |
| 140 | } |
| 141 | return *this; |
| 142 | } |
| 143 | #endif |
| 144 | |
| 145 | stats_event_list& operator<<(float value) { |
| 146 | int retval = android_log_write_float32(ctx, value); |
| 147 | if (retval < 0) { |
| 148 | ret = retval; |
| 149 | } |
| 150 | return *this; |
| 151 | } |
| 152 | |
| 153 | int write(log_id_t id = LOG_ID_EVENTS) { |
| 154 | /* facilitate -EBUSY retry */ |
| 155 | if ((ret == -EBUSY) || (ret > 0)) { |
| 156 | ret = 0; |
| 157 | } |
| 158 | int retval = write_to_logger(ctx, id); |
| 159 | /* existing errors trump transmission errors */ |
| 160 | if (!ret) { |
| 161 | ret = retval; |
| 162 | } |
| 163 | return ret; |
| 164 | } |
| 165 | |
| 166 | /* |
| 167 | * Append<Type> methods removes any integer promotion |
| 168 | * confusion, and adds access to string with length. |
| 169 | * Append methods are also added for all types for |
| 170 | * convenience. |
| 171 | */ |
| 172 | |
| 173 | bool AppendInt(int32_t value) { |
| 174 | int retval = android_log_write_int32(ctx, value); |
| 175 | if (retval < 0) { |
| 176 | ret = retval; |
| 177 | } |
| 178 | return ret >= 0; |
| 179 | } |
| 180 | |
| 181 | bool AppendLong(int64_t value) { |
| 182 | int retval = android_log_write_int64(ctx, value); |
| 183 | if (retval < 0) { |
| 184 | ret = retval; |
| 185 | } |
| 186 | return ret >= 0; |
| 187 | } |
| 188 | |
| 189 | bool AppendString(const char* value) { |
| 190 | int retval = android_log_write_string8(ctx, value); |
| 191 | if (retval < 0) { |
| 192 | ret = retval; |
| 193 | } |
| 194 | return ret >= 0; |
| 195 | } |
| 196 | |
| 197 | bool AppendString(const char* value, size_t len) { |
| 198 | int retval = android_log_write_string8_len(ctx, value, len); |
| 199 | if (retval < 0) { |
| 200 | ret = retval; |
| 201 | } |
| 202 | return ret >= 0; |
| 203 | } |
| 204 | |
| 205 | #if defined(_USING_LIBCXX) |
| 206 | bool AppendString(const std::string& value) { |
| 207 | int retval = android_log_write_string8_len(ctx, value.data(), value.length()); |
| 208 | if (retval < 0) { |
| 209 | ret = retval; |
| 210 | } |
| 211 | return ret; |
| 212 | } |
| 213 | |
| 214 | bool Append(const std::string& value) { |
| 215 | int retval = android_log_write_string8_len(ctx, value.data(), value.length()); |
| 216 | if (retval < 0) { |
| 217 | ret = retval; |
| 218 | } |
| 219 | return ret; |
| 220 | } |
| 221 | #endif |
| 222 | |
| 223 | bool AppendFloat(float value) { |
| 224 | int retval = android_log_write_float32(ctx, value); |
| 225 | if (retval < 0) { |
| 226 | ret = retval; |
| 227 | } |
| 228 | return ret >= 0; |
| 229 | } |
| 230 | |
| 231 | template <typename Tvalue> |
| 232 | bool Append(Tvalue value) { |
| 233 | *this << value; |
| 234 | return ret >= 0; |
| 235 | } |
| 236 | |
| 237 | bool Append(const char* value, size_t len) { |
| 238 | int retval = android_log_write_string8_len(ctx, value, len); |
| 239 | if (retval < 0) { |
| 240 | ret = retval; |
| 241 | } |
| 242 | return ret >= 0; |
| 243 | } |
| 244 | |
| 245 | android_log_list_element read() { return android_log_read_next(ctx); } |
| 246 | android_log_list_element peek() { return android_log_peek_next(ctx); } |
| 247 | }; |
| 248 | |
| 249 | #endif |
| 250 | #endif // ANDROID_STATS_LOG_STATS_EVENT_LIST_H |