9c175fa83f
* Experimental multiple allocation interface improved and changed again. Still unstable. * Replaced deprecated BOOST_NO_XXXX with newer BOOST_NO_CXX11_XXX macros. * [*ABI breaking]: changed node pool allocators internals for improved efficiency. [SVN r81521]
68 lines
1.9 KiB
C++
68 lines
1.9 KiB
C++
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// (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>
|
|
//[doc_anonymous_semaphoreB
|
|
#include <boost/interprocess/shared_memory_object.hpp>
|
|
#include <boost/interprocess/mapped_region.hpp>
|
|
#include <iostream>
|
|
#include "doc_anonymous_semaphore_shared_data.hpp"
|
|
|
|
using namespace boost::interprocess;
|
|
|
|
int main ()
|
|
{
|
|
//Remove shared memory on destruction
|
|
struct shm_remove
|
|
{
|
|
~shm_remove(){ shared_memory_object::remove("MySharedMemory"); }
|
|
} remover;
|
|
//<-
|
|
(void)remover;
|
|
//->
|
|
|
|
//Create a shared memory object.
|
|
shared_memory_object shm
|
|
(open_only //only create
|
|
,"MySharedMemory" //name
|
|
,read_write //read-write mode
|
|
);
|
|
|
|
//Map the whole shared memory in this process
|
|
mapped_region region
|
|
(shm //What to map
|
|
,read_write //Map it as read-write
|
|
);
|
|
|
|
//Get the address of the mapped region
|
|
void * addr = region.get_address();
|
|
|
|
//Obtain the shared structure
|
|
shared_memory_buffer * data = static_cast<shared_memory_buffer*>(addr);
|
|
|
|
const int NumMsg = 100;
|
|
|
|
int extracted_data [NumMsg];
|
|
//<-
|
|
(void)extracted_data;
|
|
//->
|
|
|
|
//Extract the data
|
|
for(int i = 0; i < NumMsg; ++i){
|
|
data->nstored.wait();
|
|
data->mutex.wait();
|
|
extracted_data[i] = data->items[i % shared_memory_buffer::NumItems];
|
|
data->mutex.post();
|
|
data->nempty.post();
|
|
}
|
|
return 0;
|
|
}
|
|
//]
|
|
#include <boost/interprocess/detail/config_end.hpp>
|