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// 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
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