Delete Tracked, and move Location to its own file.

The Birth/Death tracking of tasks has been moved out-of-band into MessageLoop's PendingTask structure.

Thus, Task no longer needs to inherit from Tracked. Since Task was the only child of Tracked, delete the Tracked class and move Location to its own file.

BUG=none
TEST=builds

Review URL: http://codereview.chromium.org/7879006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@102132 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 87 insertions, 0 deletions

diff --git a/base/location.cc b/base/location.cc
new file mode 100644
index 0000000..cda5159
--- /dev/null
+++ b/base/location.cc
@@ -0,0 +1,87 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "build/build_config.h"
+
+#if defined(COMPILER_MSVC)
+// MSDN says to #include <intrin.h>, but that breaks the VS2005 build.
+extern "C" {
+  void* _ReturnAddress();
+}
+#endif
+
+#include "base/location.h"
+#include "base/string_number_conversions.h"
+#include "base/stringprintf.h"
+
+namespace tracked_objects {
+
+Location::Location(const char* function_name,
+                   const char* file_name,
+                   int line_number,
+                   const void* program_counter)
+    : function_name_(function_name),
+      file_name_(file_name),
+      line_number_(line_number),
+      program_counter_(program_counter) {
+}
+
+Location::Location()
+    : function_name_("Unknown"),
+      file_name_("Unknown"),
+      line_number_(-1),
+      program_counter_(NULL) {
+}
+
+std::string Location::ToString() const {
+  return std::string(function_name_) + "@" + file_name_ + ":" +
+      base::IntToString(line_number_);
+}
+
+void Location::Write(bool display_filename, bool display_function_name,
+                     std::string* output) const {
+  base::StringAppendF(output, "%s[%d] ",
+      display_filename ? file_name_ : "line",
+      line_number_);
+
+  if (display_function_name) {
+    WriteFunctionName(output);
+    output->push_back(' ');
+  }
+}
+
+void Location::WriteFunctionName(std::string* output) const {
+  // Translate "<" to "&lt;" for HTML safety.
+  // TODO(jar): Support ASCII or html for logging in ASCII.
+  for (const char *p = function_name_; *p; p++) {
+    switch (*p) {
+      case '<':
+        output->append("&lt;");
+        break;
+
+      case '>':
+        output->append("&gt;");
+        break;
+
+      default:
+        output->push_back(*p);
+        break;
+    }
+  }
+}
+
+#if defined(COMPILER_MSVC)
+__declspec(noinline)
+#endif
+BASE_EXPORT const void* GetProgramCounter() {
+#if defined(COMPILER_MSVC)
+  return _ReturnAddress();
+#elif defined(COMPILER_GCC)
+  return __builtin_extract_return_addr(__builtin_return_address(0));
+#endif  // COMPILER_GCC
+
+  return NULL;
+}
+
+}  // namespace tracked_objects