lldb/source/Plugins/Language/CPlusPlus/LibCxxAtomic.cpp

//===-- LibCxxAtomic.cpp ------------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "LibCxxAtomic.h"

using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::formatters;

bool
lldb_private::formatters::LibCxxAtomicSummaryProvider (ValueObject& valobj, Stream& stream, const TypeSummaryOptions& options)
{
    static ConstString g___a_("__a_");
    
    if (ValueObjectSP child = valobj.GetChildMemberWithName(g___a_, true))
    {
        std::string summary;
        if (child->GetSummaryAsCString(summary, options) && summary.size() > 0)
        {
            stream.Printf("%s", summary.c_str());
            return true;
        }
    }
    
    return false;
}

namespace lldb_private {
    namespace formatters {
        class LibcxxStdAtomicSyntheticFrontEnd : public SyntheticChildrenFrontEnd
        {
        public:
            LibcxxStdAtomicSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp);
            
            ~LibcxxStdAtomicSyntheticFrontEnd() override = default;
            
            size_t
            CalculateNumChildren() override;
            
            lldb::ValueObjectSP
            GetChildAtIndex(size_t idx) override;
            
            bool
            Update() override;
            
            bool
            MightHaveChildren() override;
            
            size_t
            GetIndexOfChildWithName(const ConstString &name) override;
            
            lldb::ValueObjectSP
            GetSyntheticValue () override;
        private:
            ValueObject *m_real_child;
        };
    } // namespace formatters
} // namespace lldb_private

lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::LibcxxStdAtomicSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
    SyntheticChildrenFrontEnd(*valobj_sp),
    m_real_child(nullptr)
{
}

bool
lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::Update()
{
    static ConstString g___a_("__a_");

    m_real_child = m_backend.GetChildMemberWithName(g___a_, true).get();
    
    return false;
}

bool
lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::MightHaveChildren()
{
    return true;
}

size_t
lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::CalculateNumChildren()
{
    return m_real_child ? m_real_child->GetNumChildren() : 0;
}

lldb::ValueObjectSP
lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::GetChildAtIndex(size_t idx)
{
    return m_real_child ? m_real_child->GetChildAtIndex(idx, true) : nullptr;
}

size_t
lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::GetIndexOfChildWithName(const ConstString &name)
{
    return m_real_child ? m_real_child->GetIndexOfChildWithName(name) : UINT32_MAX;
}

lldb::ValueObjectSP
lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::GetSyntheticValue ()
{
    if (m_real_child && m_real_child->CanProvideValue())
        return m_real_child->GetSP();
    return nullptr;
}

SyntheticChildrenFrontEnd*
lldb_private::formatters::LibcxxAtomicSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
{
    if (valobj_sp)
        return new LibcxxStdAtomicSyntheticFrontEnd(valobj_sp);
    return nullptr;
}