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  1. #include <boost/interprocess/managed_shared_memory.hpp>
  2. #include <cstring>
  3. #include <string>
  4. #include <cstdlib> //std::system
  5. #include <iostream>
  6. #include <stdio.h>
  7.  
  8. using namespace boost::interprocess;
  9.  
  10. class MyClass {
  11.         public:
  12.                 MyClass();
  13.                 ~MyClass();
  14.                 std::string name;
  15. };
  16. MyClass::MyClass() { this->name = "init"; }
  17. MyClass::~MyClass() { }
  18.  
  19. int main( int argc, char *argv[] ) {
  20.         if ( argc == 1 ) { // Parent process
  21.                 std::cout << "parent: " << std::endl;
  22.                 struct shm_remove { // Remove shared memory on construction and destruction
  23.                         shm_remove() { shared_memory_object::remove("MySharedMemory"); }
  24.                         ~shm_remove(){ shared_memory_object::remove("MySharedMemory"); }
  25.                 } remover;
  26.                 managed_shared_memory shm(create_only, "MySharedMemory", 1000); // Create a managed shared memory
  27.                 MyClass *myclass = shm.construct<MyClass>("MyClass")(); // Construct a named object
  28.                 std::cout << "parent see: " << myclass << std::endl;
  29.                 std::cout << "parent see: " << myclass->name << std::endl;
  30.                 std::string s( argv[0] );
  31.                 s += " child ";
  32.                 std::system( s.c_str() );
  33.         } else {
  34.                 std::cout << "child: " << std::endl;
  35.                 managed_shared_memory shm(open_only, "MySharedMemory");
  36.                 MyClass *myclass = shm.find<MyClass>("MyClass").first;
  37.                 std::cout << "child see: " << myclass << std::endl;
  38.                 std::cout << "child see: " << myclass->name << std::endl;
  39.         }
  40.         return 0;
  41. }
  42.    
  43. parent:
  44. parent see: 0x7f54974fc118
  45. parent see: init
  46. child:
  47. child see: 0x7f8431583118
  48. Segmentation fault
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