25bb48435f
- Added macro for unnamed semaphores as OSX claims this support but returns ENOSYS, which is not very useful. - Added macro for mapped files, as QNX does not support them.
101 lines
2.9 KiB
C++
101 lines
2.9 KiB
C++
//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2006-2012. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/interprocess for documentation.
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//
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//////////////////////////////////////////////////////////////////////////////
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#if defined(BOOST_INTERPROCESS_MAPPED_FILES)
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#include <boost/interprocess/detail/config_begin.hpp>
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//[doc_managed_multiple_allocation
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#include <boost/interprocess/managed_shared_memory.hpp>
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#include <boost/move/utility_core.hpp> //boost::move
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#include <cassert>//assert
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#include <cstring>//std::memset
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#include <new> //std::nothrow
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#include <vector> //std::vector
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//<-
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#include "../test/get_process_id_name.hpp"
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//->
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int main()
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{
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using namespace boost::interprocess;
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typedef managed_shared_memory::multiallocation_chain multiallocation_chain;
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//Remove shared memory on construction and destruction
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struct shm_remove
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{
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//<-
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#if 1
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shm_remove() { shared_memory_object::remove(test::get_process_id_name()); }
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~shm_remove(){ shared_memory_object::remove(test::get_process_id_name()); }
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#else
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//->
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shm_remove() { shared_memory_object::remove("MySharedMemory"); }
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~shm_remove(){ shared_memory_object::remove("MySharedMemory"); }
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//<-
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#endif
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//->
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} remover;
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//<-
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(void)remover;
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//->
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//<-
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#if 1
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managed_shared_memory managed_shm(create_only,test::get_process_id_name(), 65536);
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#else
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//->
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managed_shared_memory managed_shm(create_only,"MySharedMemory", 65536);
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//<-
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#endif
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//->
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//Allocate 16 elements of 100 bytes in a single call. Non-throwing version.
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multiallocation_chain chain;
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managed_shm.allocate_many(std::nothrow, 100, 16, chain);
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//Check if the memory allocation was successful
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if(chain.empty()) return 1;
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//Allocated buffers
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std::vector<void*> allocated_buffers;
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//Initialize our data
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while(!chain.empty()){
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void *buf = chain.pop_front();
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allocated_buffers.push_back(buf);
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//The iterator must be incremented before overwriting memory
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//because otherwise, the iterator is invalidated.
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std::memset(buf, 0, 100);
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}
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//Now deallocate
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while(!allocated_buffers.empty()){
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managed_shm.deallocate(allocated_buffers.back());
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allocated_buffers.pop_back();
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}
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//Allocate 10 buffers of different sizes in a single call. Throwing version
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managed_shared_memory::size_type sizes[10];
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for(std::size_t i = 0; i < 10; ++i)
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sizes[i] = i*3;
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managed_shm.allocate_many(sizes, 10, 1, chain);
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managed_shm.deallocate_many(chain);
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return 0;
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}
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//]
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#include <boost/interprocess/detail/config_end.hpp>
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#else //#if defined(BOOST_INTERPROCESS_MAPPED_FILES)
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int main()
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{
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return 0;
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}
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#endif//#if defined(BOOST_INTERPROCESS_MAPPED_FILES)
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