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drape/cpu_buffer.cpp
67 строк
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Anatoliy Tomilov
[drape] [iOS] Changes to catch a source of crash at dp::CPUBuffer::UploadData MAPSME-12898
14 сен 2020, 13:36
14 сен 2020, 13:36
58f7713
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#include "drape/cpu_buffer.hpp" #include "base/math.hpp" #include "base/shared_buffer_manager.hpp" #include "base/assert.hpp" #include <cstring> namespace dp { CPUBuffer::CPUBuffer(uint8_t elementSize, uint32_t capacity) : TBase(elementSize, capacity) { uint32_t memorySize = base::NextPowOf2(GetCapacity() * GetElementSize()); m_memory = SharedBufferManager::instance().reserveSharedBuffer(memorySize); m_memoryCursor = NonConstData(); } CPUBuffer::~CPUBuffer() { m_memoryCursor = nullptr; SharedBufferManager::instance().freeSharedBuffer(m_memory->size(), m_memory); } void CPUBuffer::UploadData(void const * data, uint32_t elementCount) { CHECK(elementCount == 0 || data != nullptr, (elementCount)); uint32_t byteCountToCopy = GetElementSize() * elementCount; #ifdef DEBUG // Memory check ASSERT(GetCursor() + byteCountToCopy <= Data() + m_memory->size(), ()); #endif memcpy(GetCursor(), data, byteCountToCopy); TBase::UploadData(elementCount); } void CPUBuffer::Seek(uint32_t elementNumber) { uint32_t offsetFromBegin = GetElementSize() * elementNumber; ASSERT(Data() + offsetFromBegin <= Data() + m_memory->size(), ()); TBase::Seek(elementNumber); m_memoryCursor = NonConstData() + offsetFromBegin; } uint32_t CPUBuffer::GetCurrentElementNumber() const { auto pointerDiff = static_cast<uint32_t>(GetCursor() - Data()); ASSERT(pointerDiff % GetElementSize() == 0, ()); return pointerDiff / GetElementSize(); } unsigned char const * CPUBuffer::Data() const { return &((*m_memory)[0]); } unsigned char * CPUBuffer::NonConstData() { return &((*m_memory)[0]); } unsigned char * CPUBuffer::GetCursor() const { return m_memoryCursor; } } // namespace dp