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      1 /*
      2  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #include <signal.h>
     12 #include <stdlib.h>
     13 #include <stdio.h>
     14 #include <string.h>
     15 
     16 #if WEBRTC_WIN
     17 #define WIN32_LEAN_AND_MEAN
     18 #include <windows.h>
     19 #endif  // WEBRTC_WIN
     20 
     21 #if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)
     22 #include <CoreServices/CoreServices.h>
     23 #endif  // WEBRTC_MAC && !defined(WEBRTC_IOS)
     24 
     25 #include <algorithm>
     26 #include "webrtc/base/common.h"
     27 #include "webrtc/base/logging.h"
     28 
     29 //////////////////////////////////////////////////////////////////////
     30 // Assertions
     31 //////////////////////////////////////////////////////////////////////
     32 
     33 namespace rtc {
     34 
     35 void Break() {
     36 #if WEBRTC_WIN
     37   ::DebugBreak();
     38 #else  // !WEBRTC_WIN
     39   // On POSIX systems, SIGTRAP signals debuggers to break without killing the
     40   // process. If a debugger isn't attached, the uncaught SIGTRAP will crash the
     41   // app.
     42   raise(SIGTRAP);
     43 #endif
     44   // If a debugger wasn't attached, we will have crashed by this point. If a
     45   // debugger is attached, we'll continue from here.
     46 }
     47 
     48 static AssertLogger custom_assert_logger_ = NULL;
     49 
     50 void SetCustomAssertLogger(AssertLogger logger) {
     51   custom_assert_logger_ = logger;
     52 }
     53 
     54 void LogAssert(const char* function, const char* file, int line,
     55                const char* expression) {
     56   if (custom_assert_logger_) {
     57     custom_assert_logger_(function, file, line, expression);
     58   } else {
     59     LOG(LS_ERROR) << file << "(" << line << ")" << ": ASSERT FAILED: "
     60                   << expression << " @ " << function;
     61   }
     62 }
     63 
     64 bool IsOdd(int n) {
     65   return (n & 0x1);
     66 }
     67 
     68 bool IsEven(int n) {
     69   return !IsOdd(n);
     70 }
     71 
     72 } // namespace rtc
     73