| ////////////////////////////////////////////////////////////////////////////// |
| // |
| // (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> |
| //[doc_anonymous_mutexB |
| #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 () |
| { |
| //Remove shared memory on destruction |
| struct shm_remove |
| { |
| ~shm_remove(){ shared_memory_object::remove("MySharedMemory"); } |
| } remover; |
| |
| //Open the 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(); |
| |
| //Construct the shared structure in memory |
| shared_memory_log * data = static_cast<shared_memory_log*>(addr); |
| |
| //Write some logs |
| for(int i = 0; i < 100; ++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_b = true; |
| //Mutex is released here |
| } |
| |
| //Wait until the other process ends |
| while(1){ |
| scoped_lock<interprocess_mutex> lock(data->mutex); |
| if(data->end_a) |
| break; |
| } |
| return 0; |
| } |
| //] |
| #include <boost/interprocess/detail/config_end.hpp> |