boost::interprocess能不能实现vector<string>

Question

如题，我试了一下boost::interprocess里vector的模板放boost::interprocess::string失败了，想知道为什么눈_눈

Answer 1

普遍的做法都要重新定义string并指定分配器
1.

typedef boost::interprocess::allocator<std::string, boost::interprocess::managed_shared_memory::segment_manager> shmem_allocator;
typedef boost::interprocess::vector<std::string, shmem_allocator> shmem_vector;

2.

   using namespace boost::interprocess;

   //Typedefs
   typedef managed_shared_memory::segment_manager     SegmentManager;
   typedef allocator<char, SegmentManager>            CharAllocator;
   typedef basic_string<char, std::char_traits<char>
                        ,CharAllocator>                MyShmString;
   typedef allocator<MyShmString, SegmentManager>     StringAllocator;
   typedef vector<MyShmString, StringAllocator>       MyShmStringVector;

   //Remove shared memory on construction and destruction
   struct shm_remove
   {
      shm_remove() { shared_memory_object::remove("MySharedMemory"); }
      ~shm_remove(){ shared_memory_object::remove("MySharedMemory"); }
   } remover;

   managed_shared_memory shm(create_only, "MySharedMemory", 10000);

   //Create allocators
   CharAllocator     charallocator  (shm.get_segment_manager());
   StringAllocator   stringallocator(shm.get_segment_manager());

   //Create a vector of strings in shared memory.
   MyShmStringVector *myshmvector =
      shm.construct<MyShmStringVector>("myshmvector")(stringallocator);

3.

   using namespace boost::interprocess;

   //Typedefs
   typedef managed_shared_memory::segment_manager     SegmentManager;
   typedef allocator<char, SegmentManager>            CharAllocator;
   typedef basic_string<char, std::char_traits<char>
                        ,CharAllocator>                MyShmString;
   typedef allocator<MyShmString, SegmentManager>     StringAllocator;
   typedef vector<MyShmString, StringAllocator>       MyShmStringVector;

   //Remove shared memory on construction and destruction
   struct shm_remove
   {
      shm_remove() { shared_memory_object::remove("MySharedMemory"); }
      ~shm_remove(){ shared_memory_object::remove("MySharedMemory"); }
   } remover;

   managed_shared_memory shm(create_only, "MySharedMemory", 10000);

   //Create allocators
   CharAllocator     charallocator  (shm.get_segment_manager());
   StringAllocator   stringallocator(shm.get_segment_manager());

   //Create a vector of strings in shared memory.
   MyShmStringVector *myshmvector =
      shm.construct<MyShmStringVector>("myshmvector")(stringallocator);

希望有帮助

https://www.codenong.com/12980716/
https://www.dandelioncloud.cn/article/details/1533326532022136834
http://www.predream.org/index.php/show-335-1450-1.html