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- //////////////////////////////////////////////////////////////////////////////
- //
- // (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_mutexA
- #include <boost/interprocess/shared_memory_object.hpp>
- #include <boost/interprocess/mapped_region.hpp>
- #include <boost/interprocess/sync/scoped_lock.hpp>
- #include "doc_anonymous_mutex_shared_data.hpp"
- #include <iostream>
- #include <cstdio>
- using namespace boost::interprocess;
- int main ()
- {
- try{
- //Remove shared memory on construction and destruction
- struct shm_remove
- {
- shm_remove() { shared_memory_object::remove("MySharedMemory"); }
- ~shm_remove(){ shared_memory_object::remove("MySharedMemory"); }
- } remover;
- //<-
- (void)remover;
- //->
- //Create a shared memory object.
- shared_memory_object shm
- (create_only //only create
- ,"MySharedMemory" //name
- ,read_write //read-write mode
- );
- //Set size
- shm.truncate(sizeof(shared_memory_log));
- //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();
- //Construct the shared structure in memory
- shared_memory_log * data = new (addr) shared_memory_log;
- //Write some logs
- for(int i = 0; i < shared_memory_log::NumItems; ++i){
- //Lock the mutex
- scoped_lock<interprocess_mutex> lock(data->mutex);
- std::sprintf(data->items[(data->current_line++) % shared_memory_log::NumItems]
- ,"%s_%d", "process_a", i);
- if(i == (shared_memory_log::NumItems-1))
- data->end_a = true;
- //Mutex is released here
- }
- //Wait until the other process ends
- while(1){
- scoped_lock<interprocess_mutex> lock(data->mutex);
- if(data->end_b)
- break;
- }
- }
- catch(interprocess_exception &ex){
- std::cout << ex.what() << std::endl;
- return 1;
- }
- return 0;
- }
- //]
- #include <boost/interprocess/detail/config_end.hpp>
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