third_party/WebKit/Source/platform/CrossThreadCopier.cpp

/*
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 * modification, are permitted provided that the following conditions are
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 * in the documentation and/or other materials provided with the
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#include "platform/CrossThreadCopier.h"

#include "platform/network/ResourceError.h"
#include "platform/network/ResourceRequest.h"
#include "platform/network/ResourceResponse.h"
#include "platform/weborigin/KURL.h"
#include "wtf/text/WTFString.h"
#include <memory>

namespace blink {

CrossThreadCopier<KURL>::Type CrossThreadCopier<KURL>::copy(const KURL& url)
{
    return url.copy();
}

CrossThreadCopier<String>::Type CrossThreadCopier<String>::copy(const String& str)
{
    return str.isolatedCopy();
}

CrossThreadCopier<ResourceError>::Type CrossThreadCopier<ResourceError>::copy(const ResourceError& error)
{
    return error.copy();
}

CrossThreadCopier<ResourceRequest>::Type CrossThreadCopier<ResourceRequest>::copy(const ResourceRequest& request)
{
    return passed(request.copyData());
}

CrossThreadCopier<ResourceResponse>::Type CrossThreadCopier<ResourceResponse>::copy(const ResourceResponse& response)
{
    return passed(response.copyData());
}

// Test CrossThreadCopier using static_assert.

// Verify that ThreadSafeRefCounted objects get handled correctly.
class CopierThreadSafeRefCountedTest : public ThreadSafeRefCounted<CopierThreadSafeRefCountedTest> {
};

// Add a generic specialization which will let's us verify that no other template matches.
template<typename T> struct CrossThreadCopierBase<T, false> {
    typedef int Type;
};

static_assert((std::is_same<
    PassRefPtr<CopierThreadSafeRefCountedTest>,
    CrossThreadCopier<PassRefPtr<CopierThreadSafeRefCountedTest>>::Type
    >::value),
    "PassRefPtr + ThreadSafeRefCounted should pass CrossThreadCopier");
static_assert((std::is_same<
    RefPtr<CopierThreadSafeRefCountedTest>,
    CrossThreadCopier<RefPtr<CopierThreadSafeRefCountedTest>>::Type
    >::value),
    "RefPtr + ThreadSafeRefCounted should pass CrossThreadCopier");
static_assert((std::is_same<
    int,
    CrossThreadCopier<CopierThreadSafeRefCountedTest*>::Type
    >::value),
    "Raw pointer + ThreadSafeRefCounted should NOT pass CrossThreadCopier");

// Verify that RefCounted objects only match our generic template which exposes Type as int.
class CopierRefCountedTest : public RefCounted<CopierRefCountedTest> {
};

static_assert((std::is_same<
    int,
    CrossThreadCopier<CopierRefCountedTest*>::Type
    >::value),
    "Raw pointer + RefCounted should NOT pass CrossThreadCopier");

// Verify that std::unique_ptr gets passed through.
static_assert((std::is_same<
    std::unique_ptr<float>,
    CrossThreadCopier<std::unique_ptr<float>>::Type
    >::value),
    "std::unique_ptr test");

} // namespace blink