1 files changed, 59 insertions, 0 deletions
diff --git a/webkit/extensions/v8/interval_extension.cc b/webkit/extensions/v8/interval_extension.cc
new file mode 100644
index 0000000..4f6072a
--- /dev/null
+++ b/webkit/extensions/v8/interval_extension.cc
@@ -0,0 +1,59 @@
+// Copyright (c) 2006-2008 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 "webkit/extensions/v8/interval_extension.h"
+#include "base/time.h"
+
+namespace extensions_v8 {
+
+const char* kIntervalExtensionName = "v8/Interval";
+
+class IntervalExtensionWrapper : public v8::Extension {
+ public:
+  IntervalExtensionWrapper()
+      : v8::Extension(
+            kIntervalExtensionName,
+            "var chromium;"
+            "if (!chromium)"
+            "  chromium = {};"
+            "chromium.Interval = function() {"
+            "  var start_ = 0;"
+            "  var stop_ = 0;"
+            "  native function HiResTime();"
+            "  this.start = function() {"
+            "    stop_ = 0;"
+            "    start_ = HiResTime();"
+            "  };"
+            "  this.stop = function() {"
+            "    stop_ = HiResTime();"
+            "    if (start_ == 0)"
+            "      stop_ = 0;"
+            "  };"
+            "  this.microseconds = function() {"
+            "    var stop = stop_;"
+            "    if (stop == 0 && start_ != 0)"
+            "      stop = HiResTime();"
+            "    return Math.ceil((stop - start_) * 1000000);"
+            "  };"
+            "}") {}
+
+    virtual v8::Handle<v8::FunctionTemplate> GetNativeFunction(
+        v8::Handle<v8::String> name) {
+      if (name->Equals(v8::String::New("HiResTime"))) {
+        return v8::FunctionTemplate::New(HiResTime);
+      }
+      return v8::Handle<v8::FunctionTemplate>();
+    }
+
+    static v8::Handle<v8::Value> HiResTime(const v8::Arguments& args) {
+      return v8::Number::New(base::Time::Now().ToDoubleT());
+    }
+};
+
+v8::Extension*  IntervalExtension::Get() {
+  return new IntervalExtensionWrapper();
+}
+
+}  // namespace extensions_v8
+