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      1 /*
      2  * libjingle
      3  * Copyright 2004--2005, 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_
     29 #define TALK_BASE_COMMON_H_
     30 
     31 #include "talk/base/constructormagic.h"
     32 
     33 #if defined(_MSC_VER)
     34 // warning C4355: 'this' : used in base member initializer list
     35 #pragma warning(disable:4355)
     36 #endif
     37 
     38 //////////////////////////////////////////////////////////////////////
     39 // General Utilities
     40 //////////////////////////////////////////////////////////////////////
     41 
     42 #ifndef UNUSED
     43 #define UNUSED(x) Unused(static_cast<const void *>(&x))
     44 #define UNUSED2(x,y) Unused(static_cast<const void *>(&x)); Unused(static_cast<const void *>(&y))
     45 #define UNUSED3(x,y,z) Unused(static_cast<const void *>(&x)); Unused(static_cast<const void *>(&y)); Unused(static_cast<const void *>(&z))
     46 #define UNUSED4(x,y,z,a) Unused(static_cast<const void *>(&x)); Unused(static_cast<const void *>(&y)); Unused(static_cast<const void *>(&z)); Unused(static_cast<const void *>(&a))
     47 #define UNUSED5(x,y,z,a,b) Unused(static_cast<const void *>(&x)); Unused(static_cast<const void *>(&y)); Unused(static_cast<const void *>(&z)); Unused(static_cast<const void *>(&a)); Unused(static_cast<const void *>(&b))
     48 inline void Unused(const void *) { }
     49 #endif // UNUSED
     50 
     51 #ifndef WIN32
     52 #define strnicmp(x,y,n) strncasecmp(x,y,n)
     53 #define stricmp(x,y) strcasecmp(x,y)
     54 
     55 // TODO: Remove this. std::max should be used everywhere in the code.
     56 // NOMINMAX must be defined where we include <windows.h>.
     57 #define stdmax(x,y) std::max(x,y)
     58 #else
     59 #define stdmax(x,y) talk_base::_max(x,y)
     60 #endif
     61 
     62 
     63 #define ARRAY_SIZE(x) (static_cast<int>((sizeof(x)/sizeof(x[0]))))
     64 
     65 /////////////////////////////////////////////////////////////////////////////
     66 // Assertions
     67 /////////////////////////////////////////////////////////////////////////////
     68 
     69 #ifndef ENABLE_DEBUG
     70 #define ENABLE_DEBUG _DEBUG
     71 #endif  // !defined(ENABLE_DEBUG)
     72 
     73 #if ENABLE_DEBUG
     74 
     75 namespace talk_base {
     76 
     77 // Break causes the debugger to stop executing, or the program to abort
     78 void Break();
     79 
     80 // LogAssert writes information about an assertion to the log
     81 void LogAssert(const char * function, const char * file, int line,
     82                const char * expression);
     83 
     84 inline bool Assert(bool result, const char * function, const char * file,
     85                    int line, const char * expression) {
     86   if (!result) {
     87     LogAssert(function, file, line, expression);
     88     Break();
     89     return false;
     90   }
     91   return true;
     92 }
     93 
     94 }  // namespace talk_base
     95 
     96 #if defined(_MSC_VER) && _MSC_VER < 1300
     97 #define __FUNCTION__ ""
     98 #endif
     99 
    100 #ifndef ASSERT
    101 #define ASSERT(x) (void)talk_base::Assert((x),__FUNCTION__,__FILE__,__LINE__,#x)
    102 #endif
    103 
    104 #ifndef VERIFY
    105 #define VERIFY(x) talk_base::Assert((x),__FUNCTION__,__FILE__,__LINE__,#x)
    106 #endif
    107 
    108 #else // !ENABLE_DEBUG
    109 
    110 namespace talk_base {
    111 
    112 inline bool ImplicitCastToBool(bool result) { return result; }
    113 
    114 }  // namespace talk_base
    115 
    116 #ifndef ASSERT
    117 #define ASSERT(x) (void)0
    118 #endif
    119 
    120 #ifndef VERIFY
    121 #define VERIFY(x) talk_base::ImplicitCastToBool(x)
    122 #endif
    123 
    124 #endif // !ENABLE_DEBUG
    125 
    126 #define COMPILE_TIME_ASSERT(expr)       char CTA_UNIQUE_NAME[expr]
    127 #define CTA_UNIQUE_NAME                 MAKE_NAME(__LINE__)
    128 #define CTA_MAKE_NAME(line)             MAKE_NAME2(line)
    129 #define CTA_MAKE_NAME2(line)            constraint_ ## line
    130 
    131 #ifdef __GNUC__
    132 // Forces compiler to inline, even against its better judgement. Use wisely.
    133 #define FORCE_INLINE __attribute__((always_inline))
    134 #else
    135 #define FORCE_INLINE
    136 #endif
    137 
    138 #endif // TALK_BASE_COMMON_H_
    139