parcel: Optimize small_vector sizes
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5a09fa5012
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1a46823ec5
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@ -6,6 +6,7 @@
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#include <memory>
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#include <span>
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#include <vector>
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#include <boost/container/small_vector.hpp>
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#include "common/alignment.h"
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@ -148,9 +149,9 @@ public:
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this->WriteImpl(0U, m_object_buffer);
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}
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std::vector<u8> Serialize() const {
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std::vector<u8> output_buffer(sizeof(ParcelHeader) + m_data_buffer.size() +
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m_object_buffer.size());
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std::span<u8> Serialize() {
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m_output_buffer.resize(sizeof(ParcelHeader) + m_data_buffer.size() +
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m_object_buffer.size());
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ParcelHeader header{};
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header.data_size = static_cast<u32>(m_data_buffer.size());
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@ -158,17 +159,17 @@ public:
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header.objects_size = static_cast<u32>(m_object_buffer.size());
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header.objects_offset = header.data_offset + header.data_size;
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std::memcpy(output_buffer.data(), &header, sizeof(header));
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std::ranges::copy(m_data_buffer, output_buffer.data() + header.data_offset);
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std::ranges::copy(m_object_buffer, output_buffer.data() + header.objects_offset);
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std::memcpy(m_output_buffer.data(), &header, sizeof(ParcelHeader));
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std::ranges::copy(m_data_buffer, m_output_buffer.data() + header.data_offset);
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std::ranges::copy(m_object_buffer, m_output_buffer.data() + header.objects_offset);
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return output_buffer;
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return m_output_buffer;
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}
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private:
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template <typename T>
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template <typename T, size_t BufferSize>
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requires(std::is_trivially_copyable_v<T>)
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void WriteImpl(const T& val, boost::container::small_vector<u8, 0x200>& buffer) {
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void WriteImpl(const T& val, boost::container::small_vector<u8, BufferSize>& buffer) {
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const size_t aligned_size = Common::AlignUp(sizeof(T), 4);
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const size_t old_size = buffer.size();
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buffer.resize(old_size + aligned_size);
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@ -177,8 +178,9 @@ private:
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}
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private:
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boost::container::small_vector<u8, 0x200> m_data_buffer;
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boost::container::small_vector<u8, 0x200> m_object_buffer;
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boost::container::small_vector<u8, 0x1B0> m_data_buffer;
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boost::container::small_vector<u8, 0x40> m_object_buffer;
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boost::container::small_vector<u8, 0x200> m_output_buffer;
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};
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} // namespace Service::android
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