Re: [Boost-users] Newbie Question Shared Memory Containers/Allocators

On 02/02/2020 7:07, Da Xu via Boost-users wrote:

Hi everybody,

how are you?

I am a completely noob when it comes to Boost.  :D But not a noob when it comes to C++. Though, am a bit noobish when it comes to C++14 and beyond :D

I am trying to construct a complex data container, which has a vector of floats, on managed shared memory.

I followed the documentation, added the appropriate headers and made the following declarations:

typedef managed_windows_shared_memory::segment_manager segment_manager_t; typedef allocator  void_allocator; typedef basic_string shared_string; typedef allocator float_allocator; typedef vector float_vector; typedef allocator float_vector_allocator;

class ComplexContainer { shared_string name; float_vector channelData;

public: ComplexContainer(const char * name_, const float* data_start, const float* data_end, const void_allocator& void_alloc) :      name(name_), channelData(data_start, data_end, void_alloc)    {}

ComplexContainer(const void_allocator& void_alloc) :    name(void_alloc), channelData(void_alloc) {}

ComplexContainer() {}

}

Hi, 1) shared_string also needs char_allocator as a second parameter. 2) a float vector does not expect a void_allocator, but a float_vector_allocator Best, Ion