| //===-- LibCxxQueue.cpp ---------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "LibCxx.h" |
| #include "lldb/DataFormatters/FormattersHelpers.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| namespace { |
| |
| class QueueFrontEnd : public SyntheticChildrenFrontEnd { |
| public: |
| QueueFrontEnd(ValueObject &valobj) : SyntheticChildrenFrontEnd(valobj) { |
| Update(); |
| } |
| |
| size_t GetIndexOfChildWithName(ConstString name) override { |
| return m_container_sp ? m_container_sp->GetIndexOfChildWithName(name) |
| : UINT32_MAX; |
| } |
| |
| bool MightHaveChildren() override { return true; } |
| bool Update() override; |
| |
| size_t CalculateNumChildren() override { |
| return m_container_sp ? m_container_sp->GetNumChildren() : 0; |
| } |
| |
| ValueObjectSP GetChildAtIndex(size_t idx) override { |
| return m_container_sp ? m_container_sp->GetChildAtIndex(idx, true) |
| : nullptr; |
| } |
| |
| private: |
| // The lifetime of a ValueObject and all its derivative ValueObjects |
| // (children, clones, etc.) is managed by a ClusterManager. These |
| // objects are only destroyed when every shared pointer to any of them |
| // is destroyed, so we must not store a shared pointer to any ValueObject |
| // derived from our backend ValueObject (since we're in the same cluster). |
| ValueObject* m_container_sp = nullptr; |
| }; |
| } // namespace |
| |
| bool QueueFrontEnd::Update() { |
| m_container_sp = nullptr; |
| ValueObjectSP c_sp = m_backend.GetChildMemberWithName(ConstString("c"), true); |
| if (!c_sp) |
| return false; |
| m_container_sp = c_sp->GetSyntheticValue().get(); |
| return false; |
| } |
| |
| SyntheticChildrenFrontEnd * |
| formatters::LibcxxQueueFrontEndCreator(CXXSyntheticChildren *, |
| lldb::ValueObjectSP valobj_sp) { |
| if (valobj_sp) |
| return new QueueFrontEnd(*valobj_sp); |
| return nullptr; |
| } |