1 /* 2 * libjingle 3 * Copyright 2004 Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef TALK_BASE_COMMON_H_ // NOLINT 29 #define TALK_BASE_COMMON_H_ 30 31 #include "talk/base/basictypes.h" 32 #include "talk/base/constructormagic.h" 33 34 #if defined(_MSC_VER) 35 // warning C4355: 'this' : used in base member initializer list 36 #pragma warning(disable:4355) 37 #endif 38 39 ////////////////////////////////////////////////////////////////////// 40 // General Utilities 41 ////////////////////////////////////////////////////////////////////// 42 43 // Note: UNUSED is also defined in basictypes.h 44 #ifndef UNUSED 45 #define UNUSED(x) Unused(static_cast<const void*>(&x)) 46 #define UNUSED2(x, y) Unused(static_cast<const void*>(&x)); \ 47 Unused(static_cast<const void*>(&y)) 48 #define UNUSED3(x, y, z) Unused(static_cast<const void*>(&x)); \ 49 Unused(static_cast<const void*>(&y)); \ 50 Unused(static_cast<const void*>(&z)) 51 #define UNUSED4(x, y, z, a) Unused(static_cast<const void*>(&x)); \ 52 Unused(static_cast<const void*>(&y)); \ 53 Unused(static_cast<const void*>(&z)); \ 54 Unused(static_cast<const void*>(&a)) 55 #define UNUSED5(x, y, z, a, b) Unused(static_cast<const void*>(&x)); \ 56 Unused(static_cast<const void*>(&y)); \ 57 Unused(static_cast<const void*>(&z)); \ 58 Unused(static_cast<const void*>(&a)); \ 59 Unused(static_cast<const void*>(&b)) 60 inline void Unused(const void*) {} 61 #endif // UNUSED 62 63 #ifndef WIN32 64 65 #ifndef strnicmp 66 #define strnicmp(x, y, n) strncasecmp(x, y, n) 67 #endif 68 69 #ifndef stricmp 70 #define stricmp(x, y) strcasecmp(x, y) 71 #endif 72 73 // TODO(fbarchard): Remove this. std::max should be used everywhere in the code. 74 // NOMINMAX must be defined where we include <windows.h>. 75 #define stdmax(x, y) std::max(x, y) 76 #else 77 #define stdmax(x, y) talk_base::_max(x, y) 78 #endif 79 80 #define ARRAY_SIZE(x) (static_cast<int>(sizeof(x) / sizeof(x[0]))) 81 82 ///////////////////////////////////////////////////////////////////////////// 83 // Assertions 84 ///////////////////////////////////////////////////////////////////////////// 85 86 #ifndef ENABLE_DEBUG 87 #define ENABLE_DEBUG _DEBUG 88 #endif // !defined(ENABLE_DEBUG) 89 90 // Even for release builds, allow for the override of LogAssert. Though no 91 // macro is provided, this can still be used for explicit runtime asserts 92 // and allow applications to override the assert behavior. 93 94 namespace talk_base { 95 96 97 // If a debugger is attached, triggers a debugger breakpoint. If a debugger is 98 // not attached, forces program termination. 99 void Break(); 100 101 // LogAssert writes information about an assertion to the log. It's called by 102 // Assert (and from the ASSERT macro in debug mode) before any other action 103 // is taken (e.g. breaking the debugger, abort()ing, etc.). 104 void LogAssert(const char* function, const char* file, int line, 105 const char* expression); 106 107 typedef void (*AssertLogger)(const char* function, 108 const char* file, 109 int line, 110 const char* expression); 111 112 // Sets a custom assert logger to be used instead of the default LogAssert 113 // behavior. To clear the custom assert logger, pass NULL for |logger| and the 114 // default behavior will be restored. Only one custom assert logger can be set 115 // at a time, so this should generally be set during application startup and 116 // only by one component. 117 void SetCustomAssertLogger(AssertLogger logger); 118 119 bool IsOdd(int n); 120 121 bool IsEven(int n); 122 123 } // namespace talk_base 124 125 #if ENABLE_DEBUG 126 127 namespace talk_base { 128 129 inline bool Assert(bool result, const char* function, const char* file, 130 int line, const char* expression) { 131 if (!result) { 132 LogAssert(function, file, line, expression); 133 Break(); 134 return false; 135 } 136 return true; 137 } 138 139 } // namespace talk_base 140 141 #if defined(_MSC_VER) && _MSC_VER < 1300 142 #define __FUNCTION__ "" 143 #endif 144 145 #ifndef ASSERT 146 #define ASSERT(x) \ 147 (void)talk_base::Assert((x), __FUNCTION__, __FILE__, __LINE__, #x) 148 #endif 149 150 #ifndef VERIFY 151 #define VERIFY(x) talk_base::Assert((x), __FUNCTION__, __FILE__, __LINE__, #x) 152 #endif 153 154 #else // !ENABLE_DEBUG 155 156 namespace talk_base { 157 158 inline bool ImplicitCastToBool(bool result) { return result; } 159 160 } // namespace talk_base 161 162 #ifndef ASSERT 163 #define ASSERT(x) (void)0 164 #endif 165 166 #ifndef VERIFY 167 #define VERIFY(x) talk_base::ImplicitCastToBool(x) 168 #endif 169 170 #endif // !ENABLE_DEBUG 171 172 #define COMPILE_TIME_ASSERT(expr) char CTA_UNIQUE_NAME[expr] 173 #define CTA_UNIQUE_NAME CTA_MAKE_NAME(__LINE__) 174 #define CTA_MAKE_NAME(line) CTA_MAKE_NAME2(line) 175 #define CTA_MAKE_NAME2(line) constraint_ ## line 176 177 // Forces compiler to inline, even against its better judgement. Use wisely. 178 #if defined(__GNUC__) 179 #define FORCE_INLINE __attribute__((always_inline)) 180 #elif defined(WIN32) 181 #define FORCE_INLINE __forceinline 182 #else 183 #define FORCE_INLINE 184 #endif 185 186 // Borrowed from Chromium's base/compiler_specific.h. 187 // Annotate a virtual method indicating it must be overriding a virtual 188 // method in the parent class. 189 // Use like: 190 // virtual void foo() OVERRIDE; 191 #if defined(WIN32) 192 #define OVERRIDE override 193 #elif defined(__clang__) 194 // Clang defaults to C++03 and warns about using override. Squelch that. 195 // Intentionally no push/pop here so all users of OVERRIDE ignore the warning 196 // too. This is like passing -Wno-c++11-extensions, except that GCC won't die 197 // (because it won't see this pragma). 198 #pragma clang diagnostic ignored "-Wc++11-extensions" 199 #define OVERRIDE override 200 #elif defined(__GNUC__) && __cplusplus >= 201103 && \ 201 (__GNUC__ * 10000 + __GNUC_MINOR__ * 100) >= 40700 202 // GCC 4.7 supports explicit virtual overrides when C++11 support is enabled. 203 #define OVERRIDE override 204 #else 205 #define OVERRIDE 206 #endif 207 208 // Annotate a function indicating the caller must examine the return value. 209 // Use like: 210 // int foo() WARN_UNUSED_RESULT; 211 // To explicitly ignore a result, see |ignore_result()| in <base/basictypes.h>. 212 // TODO(ajm): Hack to avoid multiple definitions until the base/ of webrtc and 213 // libjingle are merged. 214 #if !defined(WARN_UNUSED_RESULT) 215 #if defined(__GNUC__) 216 #define WARN_UNUSED_RESULT __attribute__((warn_unused_result)) 217 #else 218 #define WARN_UNUSED_RESULT 219 #endif 220 #endif // WARN_UNUSED_RESULT 221 222 #endif // TALK_BASE_COMMON_H_ // NOLINT 223
