Adds a modified copy of talk/base to webrtc/base. It is the first step in migrating talk/base to webrtc/base.

BUG=N/A
R=andrew@webrtc.org, wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/12199004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6107 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/base/common.cc

@@ -0,0 +1,64 @@
+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <signal.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#if WEBRTC_WIN
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#endif  // WEBRTC_WIN 
+
+#if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)
+#include <CoreServices/CoreServices.h>
+#endif  // WEBRTC_MAC && !defined(WEBRTC_IOS)
+
+#include <algorithm>
+#include "webrtc/base/common.h"
+#include "webrtc/base/logging.h"
+
+//////////////////////////////////////////////////////////////////////
+// Assertions
+//////////////////////////////////////////////////////////////////////
+
+namespace rtc {
+
+void Break() {
+#if WEBRTC_WIN
+  ::DebugBreak();
+#else  // !WEBRTC_WIN 
+  // On POSIX systems, SIGTRAP signals debuggers to break without killing the
+  // process. If a debugger isn't attached, the uncaught SIGTRAP will crash the
+  // app.
+  raise(SIGTRAP);
+#endif
+  // If a debugger wasn't attached, we will have crashed by this point. If a
+  // debugger is attached, we'll continue from here.
+}
+
+static AssertLogger custom_assert_logger_ = NULL;
+
+void SetCustomAssertLogger(AssertLogger logger) {
+  custom_assert_logger_ = logger;
+}
+
+void LogAssert(const char* function, const char* file, int line,
+               const char* expression) {
+  if (custom_assert_logger_) {
+    custom_assert_logger_(function, file, line, expression);
+  } else {
+    LOG(LS_ERROR) << file << "(" << line << ")" << ": ASSERT FAILED: "
+                  << expression << " @ " << function;
+  }
+}
+
+} // namespace rtc