如何防止使用wchar的Boost.Interprocess？

Question

我想交叉编译一些Boost Interprocess代码到一个没有wchar函数实现的环境，例如wcslen和wmemset。

这里是我的代码：

#define BOOST_NO_CWCHAR 
#define BOOST_NO_CWCTYPE 
#define BOOST_NO_CTYPE_FUNCTIONS 
#define BOOST_NO_INTRINSIC_WCHAR_T 
#define BOOST_NO_STD_WSTREAMBUF 
#define BOOST_NO_STD_WSTRING 
#define BOOST_NO_CHAR32_T 
#define BOOST_NO_CHAR16_T 
#define BOOST_NO_CXX11_CHAR16_T 
#define BOOST_NO_CXX11_CHAR32_T 
#define BOOST_NO_UNICODE_LITERALS 

#define BOOST_DATE_TIME_NO_LIB 
#define BOOST_ALL_NO_LIB 
//#define BOOST_INTERPROCESS_POSIX_PROCESS_SHARED 
//#define BOOST_INTERPROCESS_POSIX_TIMEOUTS 
//#define BOOST_DATE_TIME_HAS_HIGH_PRECISION_CLOCK 
#define BOOST_HAS_GETTIMEOFDAY 
#define CGAL_HAS_NO_THREADS -U__GNUG__ 
#define BOOST_NO_NATIVE_LONG_DOUBLE_FP_CLASSIFY 
#define BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS 



#include <boost/interprocess/managed_external_buffer.hpp> 
#include <boost/interprocess/allocators/allocator.hpp> 
#include <boost/interprocess/containers/list.hpp> 
#include <cstring> 
#include <boost/aligned_storage.hpp> 

using namespace boost::interprocess; 

//Alias an integer node allocator type 
//This allocator will allocate memory inside the static buffer 
typedef allocator<int, wmanaged_external_buffer::segment_manager> 
    allocator_t; 

//Alias a STL compatible list to be constructed in the static buffer 
typedef list<int, allocator_t> MyBufferList; 


void processWork(char *data, int size) 
{ 
    const int localSize = 65536; 
    static boost::aligned_storage<localSize>::type static_buffer2; 
    std::memcpy(&static_buffer2, data, localSize); 

    wmanaged_external_buffer objects_in_static_memory2 
     (open_only, &static_buffer2, localSize); 

    //Check that "MyList" has been duplicated in the second buffer 
    MyBufferList *list = objects_in_static_memory2.find<MyBufferList>(L"MyList").first; 
    std::cout << list->front(); 

    **objects_in_static_memory2.destroy<MyBufferList>(L"MyList");** 

} 

int main() 
{ 
    std::cout << "Starting"; 

    //Create the static memory who will store all objects 
    const int memsize = 65536; 

    static boost::aligned_storage<memsize>::type static_buffer; 

    //This managed memory will construct objects associated with 
    //a wide string in the static buffer 
    wmanaged_external_buffer objects_in_static_memory 
     (create_only, &static_buffer, memsize); 

    //We optimize resources to create 100 named objects in the static buffer 
    objects_in_static_memory.reserve_named_objects(100); 



    //The list must be initialized with the allocator 
    //All objects created with objects_in_static_memory will 
    //be stored in the static_buffer! 
    MyBufferList *list = objects_in_static_memory.construct<MyBufferList>(L"MyList") 
          (objects_in_static_memory.get_segment_manager()); 


    list->push_back(624); 
    processWork((char*)static_buffer.address(), memsize); 
    objects_in_static_memory.destroy<MyBufferList>(L"MyList"); 

    return 0; 
} 

在他们L “MYLIST” 的呼声沉淀升压/interprocess/segment_manager.cpp到呼叫：

index_it it = index.find(key_type (name, std::char_traits<CharT>::length(name))); 

而且试图调用wcslen在libcxx /字符串，这是我想要避免。

我试图从缓冲区名称中删除'L'，但它抱怨参数不是wchar。任何关于如何删除这个wchar依赖关系的指导最受赞赏 - 我设置的宏不幸似乎没有办法。

我使用的是最新的Boost头文件（不是我的系统上的）

马科斯

Answer 1

wmanaged_external_buffer是basic_managed_external_buffer<wchar_t>一个typedef，就像std::wstring是std::basic_string<wchar_t>一个typedef。

您应该使用managed_external_buffer（或直接使用basic_managed_external_buffer<char>）。