1 /*
2 * Copyright (C) 2017 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 CHRE_HOST_LOG_H_
18 #define CHRE_HOST_LOG_H_
19
20 #ifndef LOG_TAG
21 #define LOG_TAG "CHRE"
22 #endif
23
24 #include <log/log.h>
25
26 namespace android::chre {
27
28 /**
29 * Logs a message to both logcat and stdout/stderr. Don't use this directly;
30 * prefer one of LOGE, LOGW, etc.
31 *
32 * @param level android log level, e.g., ANDROID_LOG_ERROR
33 * @param stream output stream to print to, e.g., stdout
34 * @param format printf-style format string
35 * @param func the function name included in the log, e.g., __func__
36 * @param line line number included in the log
37 */
38 void outputHostLog(int priority, FILE *stream, const char *format,
39 const char *func, unsigned int line, ...);
40
41 } // namespace android::chre
42
43 #define LOGE(format, ...) \
44 ::android::chre::outputHostLog(ANDROID_LOG_ERROR, stderr, format, __func__, \
45 __LINE__, ##__VA_ARGS__)
46 #define LOGW(format, ...) \
47 ::android::chre::outputHostLog(ANDROID_LOG_WARN, stdout, format, __func__, \
48 __LINE__, ##__VA_ARGS__)
49 #define LOGI(format, ...) \
50 ::android::chre::outputHostLog(ANDROID_LOG_INFO, stdout, format, __func__, \
51 __LINE__, ##__VA_ARGS__)
52 #define LOGD(format, ...) \
53 ::android::chre::outputHostLog(ANDROID_LOG_DEBUG, stdout, format, __func__, \
54 __LINE__, ##__VA_ARGS__)
55
56 #if LOG_NDEBUG
chreLogNull(const char *,...)57 __attribute__((format(printf, 1, 2))) inline void chreLogNull(
58 const char * /*fmt*/, ...) {}
59
60 #define LOGV(format, ...) chreLogNull(format, ##__VA_ARGS__)
61 #else
62 #define LOGV(format, ...) \
63 ::android::chre::outputHostLog(ANDROID_LOG_VERBOSE, stdout, format, \
64 __func__, __LINE__, ##__VA_ARGS__)
65 #endif
66
67 /**
68 * Helper to log a library error with a human-readable version of the provided
69 * error code.
70 *
71 * @param message Error message string to log
72 * @param error_code Standard error code number (EINVAL, etc)
73 */
74 #define LOG_ERROR(message, error_code) \
75 do { \
76 char error_string[64]; \
77 strerror_r(error_code, error_string, sizeof(error_string)); \
78 LOGE("%s: %s (%d)\n", message, error_string, error_code); \
79 } while (0)
80
81 #endif // CHRE_HOST_LOG_H_
82