72 lines
2.2 KiB
C++
72 lines
2.2 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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#include <boost/interprocess/detail/config_begin.hpp>
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//[doc_anonymous_conditionB
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#include <boost/interprocess/shared_memory_object.hpp>
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#include <boost/interprocess/mapped_region.hpp>
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#include <boost/interprocess/sync/scoped_lock.hpp>
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#include <iostream>
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#include <cstring>
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#include "doc_anonymous_condition_shared_data.hpp"
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using namespace boost::interprocess;
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int main ()
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{
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//Create a shared memory object.
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shared_memory_object shm
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(open_only //only create
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,"MySharedMemory" //name
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,read_write //read-write mode
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);
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try{
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//Map the whole shared memory in this process
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mapped_region region
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(shm //What to map
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,read_write //Map it as read-write
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);
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//Get the address of the mapped region
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void * addr = region.get_address();
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//Obtain a pointer to the shared structure
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trace_queue * data = static_cast<trace_queue*>(addr);
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//Print messages until the other process marks the end
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bool end_loop = false;
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do{
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scoped_lock<interprocess_mutex> lock(data->mutex);
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if(!data->message_in){
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data->cond_empty.wait(lock);
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}
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if(std::strcmp(data->items, "last message") == 0){
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end_loop = true;
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}
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else{
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//Print the message
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std::cout << data->items << std::endl;
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//Notify the other process that the buffer is empty
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data->message_in = false;
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data->cond_full.notify_one();
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}
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}
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while(!end_loop);
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}
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catch(interprocess_exception &ex){
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std::cout << ex.what() << std::endl;
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return 1;
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}
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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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