| ////////////////////////////////////////////////////////////////////////////// |
| // |
| // (C) Copyright Ion Gaztanaga 2006-2009. 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; |
| |
| //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> |