| ////////////////////////////////////////////////////////////////////////////// |
| // |
| // (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_managed_heap_memory |
| #include <boost/interprocess/containers/list.hpp> |
| #include <boost/interprocess/managed_heap_memory.hpp> |
| #include <boost/interprocess/allocators/allocator.hpp> |
| #include <cstddef> |
| |
| using namespace boost::interprocess; |
| typedef list<int, allocator<int, managed_heap_memory::segment_manager> > |
| MyList; |
| |
| int main () |
| { |
| //We will create a buffer of 1000 bytes to store a list |
| managed_heap_memory heap_memory(1000); |
| |
| MyList * mylist = heap_memory.construct<MyList>("MyList") |
| (heap_memory.get_segment_manager()); |
| |
| //Obtain handle, that identifies the list in the buffer |
| managed_heap_memory::handle_t list_handle = heap_memory.get_handle_from_address(mylist); |
| |
| //Fill list until there is no more memory in the buffer |
| try{ |
| while(1) { |
| mylist->insert(mylist->begin(), 0); |
| } |
| } |
| catch(const bad_alloc &){ |
| //memory is full |
| } |
| //Let's obtain the size of the list |
| std::size_t old_size = mylist->size(); |
| |
| //To make the list bigger, let's increase the heap buffer |
| //in 1000 bytes more. |
| heap_memory.grow(1000); |
| |
| //If memory has been reallocated, the old pointer is invalid, so |
| //use previously obtained handle to find the new pointer. |
| mylist = static_cast<MyList *> |
| (heap_memory.get_address_from_handle(list_handle)); |
| |
| //Fill list until there is no more memory in the buffer |
| try{ |
| while(1) { |
| mylist->insert(mylist->begin(), 0); |
| } |
| } |
| catch(const bad_alloc &){ |
| //memory is full |
| } |
| |
| //Let's obtain the new size of the list |
| std::size_t new_size = mylist->size(); |
| |
| assert(new_size > old_size); |
| |
| //Destroy list |
| heap_memory.destroy_ptr(mylist); |
| |
| return 0; |
| } |
| //] |
| #include <boost/interprocess/detail/config_end.hpp> |