我想使用Boost.Interprocess在共享內存中放置一個結構。該結構將在兩個進程之間共享,作為序列化數據的主要交換區域。我目前正在尋找簡單方面的最佳解決方案。 名稱空間bi = boost :: interprocess; typedef bi :: allocatorShmemSimpleDataAllocator; typedef bi :: vector SimpleDataVector; 結構SimpleData { SimpleData(){} SimpleData(char * ptr) :數據(ptr) {} / **指向數據的偏移指針* / bi :: offset_ptr 數據; }; //主要共享結構 struct SharedMainStruct //編輯,謝謝Sehe { SharedMainStruct(ShmemSimpleDataAllocator simple_allocator) :m_inputs(simple_allocator), m_outputs(簡單分配器) {} //輸入,輸出和屬性 SimpleDataVector m_inputs; SimpleDataVector m_outputs; bi :: interprocess_mutex m_mutex; bi :: interprocess_condition m_cond; }; //這裡的主要代碼 //創建託管共享內存 my_sho =新的bi :: managed_shared_memory(bi :: create_only,“ test_SO”,1000000); //在共享內存中構建主結構 ShmemSimpleDataAllocator data_allocator(my_sho-> get_segment_manager()); m_main_struct = my_sho-> construct (“ main”)(data_allocator); //(1) 想法是將此SharedMainStruct放置在共享內存中,以便兩個進程都可以訪問它。該代碼行(1)是否正確?我想我會錯過一些運行時代碼,例如文檔中的代碼?喜歡 : //初始化共享內存STL兼容分配器 const ShmemSimpleDataAllocatoralloc_inst(segment.get_segment_manager()); //使用參數alloc_inst在共享內存中構造一個名為“ MyVector”的向量 SimpleDataVector * myvector = segment.construct (“ SimpleDataVector”)(alloc_inst); -更新- 是的,向量可以存儲為成員變量。我們應該提供分配器作為構造函數的參數...
2021-01-24 08:15:31
精華: 類在內存中是連續佈置的,因此您不能在字面上有選擇地將其某些部分存儲在共享內存中。 出於同樣的原因,將offset_ptr存儲在共享內存之外是沒有用的,您可以簡單地用原始指針替換它。 進一步頭腦風暴 前兩個句子應該足以消除任何混淆。 您當然可以將MainStruct存儲在共享內存中。如果可以共享MainStruct中的所有數據,這可能會有所幫助。 如果您只需要這樣共享MainStruct的那一部分,那麼將其明確化似乎很明顯: //輸入,輸出和屬性 struct SharedBuffers { 模板SharedBuffers(Alloc alloc = {}):m_inputs(alloc),m_outputs(alloc){} Shared :: Vector m_inputs; Shared :: Vector m_outputs; }; SharedBuffers * m_buffers; // bip :: offset_ptr <>在共享內存之外過大 輕微建議用共享的char向量替換“ raw” offset_ptr`。 | 你的答案 StackExchange.ifUsing(“ editor”,function(){ StackExchange.using(“ externalEditor”,function(){ StackExchange.using(“ snippets”,function(){ StackExchange.snippets.init(); }); }); },“代碼段”); StackExchange.ready(function(){ var channelOptions = { 標籤:“” .split(“”), id:“ 1” }; initTagRenderer(“”。split(“”),“” .split(“”),channelOptions); StackExchange.using(“ externalEditor”,function(){ //如果啟用了摘要,則必須在摘要後觸發編輯器 如果(StackExchange.settings.snippets.snippetsEnabled){ StackExchange.using(“ snippets”,function(){ createEditor(); }); 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