Add parallel race/motion loading and thread-safe Pack/Pool managers

src/PackLib/Pack.cpp

@@ -13,7 +13,7 @@ static ZSTD_DCtx* GetThreadLocalZSTDContext()
 	return g_zstdDCtx;
 }
 
-bool CPack::Open(const std::string& path, TPackFileMap& entries)
+bool CPack::Load(const std::string& path)
 {
 	std::error_code ec;
 	m_file.map(path, ec);
@@ -34,13 +34,13 @@ bool CPack::Open(const std::string& path, TPackFileMap& entries)
 		return false;
 	}
 
+	m_index.resize(m_header.entry_num);
+
 	for (size_t i = 0; i < m_header.entry_num; i++) {
-		TPackFileEntry entry;
+		TPackFileEntry& entry = m_index[i];
 		memcpy(&entry, m_file.data() + sizeof(TPackFileHeader) + i * sizeof(TPackFileEntry), sizeof(TPackFileEntry));
 		m_decryption.ProcessData((CryptoPP::byte*)&entry, (CryptoPP::byte*)&entry, sizeof(TPackFileEntry));
 
-		entries[entry.file_name] = std::make_pair(shared_from_this(), entry);
-
 		if (file_size < m_header.data_begin + entry.offset + entry.compressed_size) {
 			return false;
 		}
@@ -97,4 +97,4 @@ bool CPack::GetFileWithPool(const TPackFileEntry& entry, TPackFile& result, CBuf
 	}
 
 	return true;
-}
+}

src/PackLib/Pack.h

@@ -12,13 +12,16 @@ public:
 	CPack() = default;
 	~CPack() = default;
 
-	bool Open(const std::string& path, TPackFileMap& entries);
+	bool Load(const std::string& path);
+	const std::vector<TPackFileEntry>& GetIndex() const { return m_index; }
+	
 	bool GetFile(const TPackFileEntry& entry, TPackFile& result);
 	bool GetFileWithPool(const TPackFileEntry& entry, TPackFile& result, CBufferPool* pPool);
 
 private:
 	TPackFileHeader m_header;
+	std::vector<TPackFileEntry> m_index;
 	mio::mmap_source m_file;
 
 	CryptoPP::CTR_Mode<CryptoPP::Camellia>::Decryption m_decryption;
-};
+};

src/PackLib/PackManager.cpp

@@ -23,8 +23,19 @@ bool CPackManager::AddPack(const std::string& path)
 {
 	std::shared_ptr<CPack> pack = std::make_shared<CPack>();
 
+	if (!pack->Load(path))
+	{
+		return false;
+	}
+
 	std::lock_guard<std::mutex> lock(m_mutex);
-	return pack->Open(path, m_entries);
+	const auto& index = pack->GetIndex();
+	for (const auto& entry : index)
+	{
+		m_entries[entry.file_name] = std::make_pair(pack, entry);
+	}
+
+	return true;
 }
 
 bool CPackManager::GetFile(std::string_view path, TPackFile& result)