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.
118 lines
3.3 KiB
C++
118 lines
3.3 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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#include <boost/interprocess/detail/workaround.hpp>
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#include <boost/interprocess/containers/list.hpp>
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#include <boost/interprocess/managed_mapped_file.hpp>
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#include <boost/interprocess/allocators/allocator.hpp>
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#include <cstddef>
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#include <cstdio>
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//<-
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#include "../test/get_process_id_name.hpp"
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//->
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using namespace boost::interprocess;
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typedef list<int, allocator<int, managed_mapped_file::segment_manager> >
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MyList;
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int main ()
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{
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//Define file names
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//<-
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#if 1
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std::string file(boost::interprocess::ipcdetail::get_temporary_path());
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file += "/"; file += test::get_process_id_name();
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const char *FileName = file.c_str();
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#else
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//->
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const char *FileName = "file_mapping";
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//<-
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#endif
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//->
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const std::size_t FileSize = 1000;
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file_mapping::remove(FileName);
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try{
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MyList::size_type old_size = 0;
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managed_mapped_file::handle_t list_handle;
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{
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managed_mapped_file mfile_memory(create_only, FileName, FileSize);
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MyList *mylist = mfile_memory.construct<MyList>("MyList")
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(mfile_memory.get_segment_manager());
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//Obtain handle, that identifies the list in the buffer
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list_handle = mfile_memory.get_handle_from_address(mylist);
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//Fill list until there is no more room in the file
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try{
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while(1) {
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mylist->insert(mylist->begin(), 0);
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}
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}
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catch(const bad_alloc &){
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//mapped file is full
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}
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//Let's obtain the size of the list
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old_size = mylist->size();
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}
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//To make the list bigger, let's increase the mapped file
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//in FileSize bytes more.
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managed_mapped_file::grow(FileName, FileSize*2);
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{
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managed_mapped_file mfile_memory(open_only, FileName);
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//If mapping address has changed, the old pointer is invalid,
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//so use previously obtained handle to find the new pointer.
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MyList *mylist = static_cast<MyList *>
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(mfile_memory.get_address_from_handle(list_handle));
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//Fill list until there is no more room in the file
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try{
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while(1) {
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mylist->insert(mylist->begin(), 0);
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}
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}
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catch(const bad_alloc &){
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//mapped file is full
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}
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//Let's obtain the new size of the list
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MyList::size_type new_size = mylist->size();
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assert(new_size > old_size);
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//Destroy list
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mfile_memory.destroy_ptr(mylist);
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}
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}
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catch(...){
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file_mapping::remove(FileName);
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throw;
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}
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file_mapping::remove(FileName);
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return 0;
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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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