1 ////////////////////////////////////////////////////////////////////////////// 2 // 3 // (C) Copyright Ion Gaztanaga 2006-2012. Distributed under the Boost 4 // Software License, Version 1.0. (See accompanying file 5 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 6 // 7 // See http://www.boost.org/libs/interprocess for documentation. 8 // 9 ////////////////////////////////////////////////////////////////////////////// 10 #include <boost/interprocess/detail/config_begin.hpp> 11 //[doc_anonymous_conditionA 12 #include <boost/interprocess/shared_memory_object.hpp> 13 #include <boost/interprocess/mapped_region.hpp> 14 #include <boost/interprocess/sync/scoped_lock.hpp> 15 #include <iostream> 16 #include <cstdio> 17 #include "doc_anonymous_condition_shared_data.hpp" 18 19 using namespace boost::interprocess; 20 main()21int main () 22 { 23 24 //Erase previous shared memory and schedule erasure on exit 25 struct shm_remove 26 { 27 shm_remove() { shared_memory_object::remove("MySharedMemory"); } 28 ~shm_remove(){ shared_memory_object::remove("MySharedMemory"); } 29 } remover; 30 //<- 31 (void)remover; 32 //-> 33 34 //Create a shared memory object. 35 shared_memory_object shm 36 (create_only //only create 37 ,"MySharedMemory" //name 38 ,read_write //read-write mode 39 ); 40 try{ 41 //Set size 42 shm.truncate(sizeof(trace_queue)); 43 44 //Map the whole shared memory in this process 45 mapped_region region 46 (shm //What to map 47 ,read_write //Map it as read-write 48 ); 49 50 //Get the address of the mapped region 51 void * addr = region.get_address(); 52 53 //Construct the shared structure in memory 54 trace_queue * data = new (addr) trace_queue; 55 56 const int NumMsg = 100; 57 58 for(int i = 0; i < NumMsg; ++i){ 59 scoped_lock<interprocess_mutex> lock(data->mutex); 60 if(data->message_in){ 61 data->cond_full.wait(lock); 62 } 63 if(i == (NumMsg-1)) 64 std::sprintf(data->items, "%s", "last message"); 65 else 66 std::sprintf(data->items, "%s_%d", "my_trace", i); 67 68 //Notify to the other process that there is a message 69 data->cond_empty.notify_one(); 70 71 //Mark message buffer as full 72 data->message_in = true; 73 } 74 } 75 catch(interprocess_exception &ex){ 76 std::cout << ex.what() << std::endl; 77 return 1; 78 } 79 80 return 0; 81 } 82 //] 83