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- //////////////////////////////////////////////////////////////////////////////
- //
- // (C) Copyright Ion Gaztanaga 2006-2012. Distributed under the Boost
- // Software License, Version 1.0. (See accompanying file
- // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- //
- // See http://www.boost.org/libs/interprocess for documentation.
- //
- //////////////////////////////////////////////////////////////////////////////
- #include <boost/interprocess/detail/config_begin.hpp>
- #include <boost/interprocess/detail/workaround.hpp>
- //[doc_spawn_vector
- #include <boost/interprocess/managed_shared_memory.hpp>
- #include <boost/interprocess/containers/vector.hpp>
- #include <boost/interprocess/allocators/allocator.hpp>
- #include <string>
- #include <cstdlib> //std::system
- //<-
- #include "../test/get_process_id_name.hpp"
- //->
- using namespace boost::interprocess;
- //Define an STL compatible allocator of ints that allocates from the managed_shared_memory.
- //This allocator will allow placing containers in the segment
- typedef allocator<int, managed_shared_memory::segment_manager> ShmemAllocator;
- //Alias a vector that uses the previous STL-like allocator so that allocates
- //its values from the segment
- typedef vector<int, ShmemAllocator> MyVector;
- //Main function. For parent process argc == 1, for child process argc == 2
- int main(int argc, char *argv[])
- {
- if(argc == 1){ //Parent process
- //Remove shared memory on construction and destruction
- struct shm_remove
- {
- //<-
- #if 1
- shm_remove() { shared_memory_object::remove(test::get_process_id_name()); }
- ~shm_remove(){ shared_memory_object::remove(test::get_process_id_name()); }
- #else
- //->
- shm_remove() { shared_memory_object::remove("MySharedMemory"); }
- ~shm_remove(){ shared_memory_object::remove("MySharedMemory"); }
- //<-
- #endif
- //->
- } remover;
- //<-
- (void)remover;
- //->
- //Create a new segment with given name and size
- //<-
- #if 1
- managed_shared_memory segment(create_only, test::get_process_id_name(), 65536);
- #else
- //->
- managed_shared_memory segment(create_only, "MySharedMemory", 65536);
- //<-
- #endif
- //->
- //Initialize shared memory STL-compatible allocator
- const ShmemAllocator alloc_inst (segment.get_segment_manager());
- //Construct a vector named "MyVector" in shared memory with argument alloc_inst
- MyVector *myvector = segment.construct<MyVector>("MyVector")(alloc_inst);
- for(int i = 0; i < 100; ++i) //Insert data in the vector
- myvector->push_back(i);
- //Launch child process
- std::string s(argv[0]); s += " child ";
- //<-
- s += test::get_process_id_name();
- //->
- if(0 != std::system(s.c_str()))
- return 1;
- //Check child has destroyed the vector
- if(segment.find<MyVector>("MyVector").first)
- return 1;
- }
- else{ //Child process
- //Open the managed segment
- //<-
- #if 1
- managed_shared_memory segment(open_only, argv[2]);
- #else
- //->
- managed_shared_memory segment(open_only, "MySharedMemory");
- //<-
- #endif
- //->
- //Find the vector using the c-string name
- MyVector *myvector = segment.find<MyVector>("MyVector").first;
- //Use vector in reverse order
- std::sort(myvector->rbegin(), myvector->rend());
- //When done, destroy the vector from the segment
- segment.destroy<MyVector>("MyVector");
- }
- return 0;
- }
- //]
- #include <boost/interprocess/detail/config_end.hpp>
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