1 // Copyright (c) 2006, Google Inc.
2 // All rights reserved.
4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions are
8 // * Redistributions of source code must retain the above copyright
9 // notice, this list of conditions and the following disclaimer.
10 // * Redistributions in binary form must reproduce the above
11 // copyright notice, this list of conditions and the following disclaimer
12 // in the documentation and/or other materials provided with the
14 // * Neither the name of Google Inc. nor the names of its
15 // contributors may be used to endorse or promote products derived from
16 // this software without specific prior written permission.
18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 // Author: Maxim Lifantsev
32 // Thread-safe logging routines that do not allocate any memory or
33 // acquire any locks, and can therefore be used by low-level memory
34 // allocation and synchronization code.
36 #ifndef BASE_RAW_LOGGING_H_
37 #define BASE_RAW_LOGGING_H_
41 @ac_google_start_namespace@
43 #include "glog/log_severity.h"
44 #include "glog/vlog_is_on.h"
46 // Annoying stuff for windows -- makes sure clients can import these functions
47 #ifndef GOOGLE_GLOG_DLL_DECL
48 # if defined(_WIN32) && !defined(__CYGWIN__)
49 # define GOOGLE_GLOG_DLL_DECL __declspec(dllimport)
51 # define GOOGLE_GLOG_DLL_DECL
55 // This is similar to LOG(severity) << format... and VLOG(level) << format..,
57 // * it is to be used ONLY by low-level modules that can't use normal LOG()
58 // * it is desiged to be a low-level logger that does not allocate any
59 // memory and does not need any locks, hence:
60 // * it logs straight and ONLY to STDERR w/o buffering
61 // * it uses an explicit format and arguments list
62 // * it will silently chop off really long message strings
64 // RAW_LOG(ERROR, "Failed foo with %i: %s", status, error);
65 // RAW_VLOG(3, "status is %i", status);
66 // These will print an almost standard log lines like this to stderr only:
67 // E0821 211317 file.cc:123] RAW: Failed foo with 22: bad_file
68 // I0821 211317 file.cc:142] RAW: status is 20
69 #define RAW_LOG(severity, ...) \
71 switch (@ac_google_namespace@::GLOG_ ## severity) { \
73 RAW_LOG_INFO(__VA_ARGS__); \
76 RAW_LOG_WARNING(__VA_ARGS__); \
79 RAW_LOG_ERROR(__VA_ARGS__); \
82 RAW_LOG_FATAL(__VA_ARGS__); \
89 // The following STRIP_LOG testing is performed in the header file so that it's
90 // possible to completely compile out the logging code and the log messages.
92 #define RAW_VLOG(verboselevel, ...) \
94 if (VLOG_IS_ON(verboselevel)) { \
95 RAW_LOG_INFO(__VA_ARGS__); \
99 #define RAW_VLOG(verboselevel, ...) RawLogStub__(0, __VA_ARGS__)
100 #endif // STRIP_LOG == 0
103 #define RAW_LOG_INFO(...) @ac_google_namespace@::RawLog__(@ac_google_namespace@::GLOG_INFO, \
104 __FILE__, __LINE__, __VA_ARGS__)
106 #define RAW_LOG_INFO(...) @ac_google_namespace@::RawLogStub__(0, __VA_ARGS__)
107 #endif // STRIP_LOG == 0
110 #define RAW_LOG_WARNING(...) @ac_google_namespace@::RawLog__(@ac_google_namespace@::GLOG_WARNING, \
111 __FILE__, __LINE__, __VA_ARGS__)
113 #define RAW_LOG_WARNING(...) @ac_google_namespace@::RawLogStub__(0, __VA_ARGS__)
114 #endif // STRIP_LOG <= 1
117 #define RAW_LOG_ERROR(...) @ac_google_namespace@::RawLog__(@ac_google_namespace@::GLOG_ERROR, \
118 __FILE__, __LINE__, __VA_ARGS__)
120 #define RAW_LOG_ERROR(...) @ac_google_namespace@::RawLogStub__(0, __VA_ARGS__)
121 #endif // STRIP_LOG <= 2
124 #define RAW_LOG_FATAL(...) @ac_google_namespace@::RawLog__(@ac_google_namespace@::GLOG_FATAL, \
125 __FILE__, __LINE__, __VA_ARGS__)
127 #define RAW_LOG_FATAL(...) \
129 @ac_google_namespace@::RawLogStub__(0, __VA_ARGS__); \
132 #endif // STRIP_LOG <= 3
134 // Similar to CHECK(condition) << message,
135 // but for low-level modules: we use only RAW_LOG that does not allocate memory.
136 // We do not want to provide args list here to encourage this usage:
137 // if (!cond) RAW_LOG(FATAL, "foo ...", hard_to_compute_args);
138 // so that the args are not computed when not needed.
139 #define RAW_CHECK(condition, message) \
141 if (!(condition)) { \
142 RAW_LOG(FATAL, "Check %s failed: %s", #condition, message); \
146 // Debug versions of RAW_LOG and RAW_CHECK
149 #define RAW_DLOG(severity, ...) RAW_LOG(severity, __VA_ARGS__)
150 #define RAW_DCHECK(condition, message) RAW_CHECK(condition, message)
154 #define RAW_DLOG(severity, ...) \
156 RAW_LOG(severity, __VA_ARGS__)
157 #define RAW_DCHECK(condition, message) \
159 RAW_CHECK(condition, message)
163 // Stub log function used to work around for unused variable warnings when
164 // building with STRIP_LOG > 0.
165 static inline void RawLogStub__(int /* ignored */, ...) {
168 // Helper function to implement RAW_LOG and RAW_VLOG
169 // Logs format... at "severity" level, reporting it
170 // as called from file:line.
171 // This does not allocate memory or acquire locks.
172 GOOGLE_GLOG_DLL_DECL void RawLog__(LogSeverity severity,
175 const char* format, ...)
176 @ac_cv___attribute___printf_4_5@;
178 // Hack to propagate time information into this module so that
179 // this module does not have to directly call localtime_r(),
180 // which could allocate memory.
181 GOOGLE_GLOG_DLL_DECL void RawLog__SetLastTime(const struct tm& t, int usecs);
183 @ac_google_end_namespace@
185 #endif // BASE_RAW_LOGGING_H_