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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 #include <signal.h>
     29 #include <stdlib.h>
     30 #include <stdio.h>
     31 #include <string.h>
     32 
     33 #if WIN32
     34 #define WIN32_LEAN_AND_MEAN
     35 #include <windows.h>
     36 #endif  // WIN32
     37 
     38 #if OSX
     39 #include <CoreServices/CoreServices.h>
     40 #endif  // OSX
     41 
     42 #include <algorithm>
     43 #include "talk/base/common.h"
     44 #include "talk/base/logging.h"
     45 
     46 //////////////////////////////////////////////////////////////////////
     47 // Assertions
     48 //////////////////////////////////////////////////////////////////////
     49 
     50 namespace talk_base {
     51 
     52 void Break() {
     53 #if WIN32
     54   ::DebugBreak();
     55 #else  // !WIN32
     56   // On POSIX systems, SIGTRAP signals debuggers to break without killing the
     57   // process. If a debugger isn't attached, the uncaught SIGTRAP will crash the
     58   // app.
     59   raise(SIGTRAP);
     60 #endif
     61   // If a debugger wasn't attached, we will have crashed by this point. If a
     62   // debugger is attached, we'll continue from here.
     63 }
     64 
     65 static AssertLogger custom_assert_logger_ = NULL;
     66 
     67 void SetCustomAssertLogger(AssertLogger logger) {
     68   custom_assert_logger_ = logger;
     69 }
     70 
     71 void LogAssert(const char* function, const char* file, int line,
     72                const char* expression) {
     73   if (custom_assert_logger_) {
     74     custom_assert_logger_(function, file, line, expression);
     75   } else {
     76     LOG(LS_ERROR) << file << "(" << line << ")" << ": ASSERT FAILED: "
     77                   << expression << " @ " << function;
     78   }
     79 }
     80 
     81 bool IsOdd(int n) {
     82   return (n & 0x1);
     83 }
     84 
     85 bool IsEven(int n) {
     86   return !IsOdd(n);
     87 }
     88 
     89 } // namespace talk_base
     90