boost::unordered_multimap < char_string, complex_data , boost::hash<char_string > ,std::equal_to<char_string > , map_value_type_allocator> complex_map_type2; complex_map_type2 * mymap; managed_shared_memory segment(create_only,"
//shared_memory_object::remove("SharedMemory"); // init managed_shared_memory segment(open_only, "SharedMemory"); MyMap* mymap_for_use = segment.find < MyMap > ("MyMap").first; long int r = segment.find < MyMap > ("MyMap").second; printf("result of find map in shared-memory...
一个mapped_region能从任何memory_mappable对象创建,所以如你想象,shared_memory_object就是一个memory_mappable对象: using boost::interprocess; std::size_t ShmSize = ... //Map the second half of the memory mapped_region region ( shm//Memory-mappable object , read_write//Access mode , ShmSize/2...
一个mapped_region能从任何memory_mappable对象创建,所以如你想象,shared_memory_object就是一个memory_mappable对象: [cpp]view plain copy using boost::interprocess; std::size_t ShmSize = ... //Map the second half of the memory mapped_region region ( shm //Memory-m...
2. Because shared memory is used to exchange data betwen different processes, each process needs to map the shared memory into its address space. #include <boost/interprocess/shared_memory_object.hpp>#include<boost/interprocess/mapped_region.hpp>#include<iostream>usingnamespaceboost::interprocess;int...
shared_memory_object shm (open_only, "MySharedMemory", read_only); //Map the whole shared memory in this process mapped_region region(shm, read_only); //Check that memory was initialized to 1 char *mem = static_cast<char*>(region.get_address()); ...
what()); //file_mapping::remove("SharedMemory"); } return 0; } 执行后可以看到当前目录下已创建了内存文件。 代码语言:javascript 复制 [root@SH-todo-1412181717 /home/derrywang/boost/boost_1_60_0/demo]# ./interprocess_map_file 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18...
传递其他数据，如vector和智能指针组成的链表，可参见相关文档。利用消息队列传递共享内存中的map名称，另一方接受后使用managed_shared_memory打开。此外，Boost.Interprocess还提供了共享内存、内存映射文件、信号量、互斥锁、条件变量、可升级互斥等机制。这些机制不仅适用于进程间通信，也适用于线程间的同步。
此功能已在 UNIX 系统中实现,通过映射设备 \dev\zero 或者在符合 POSIX 标准的 mmap 系统调用中使用 MAP_ANONYMOUS 来实现。 此功能被封装在 anonymous_shared_memory() 函数中,该函数会返回一个 mapped_region 对象,该对象持有一个可以被相关进程共享的匿名共享内存段。 #include <boost/interprocess/anonymous_...
例如,使用boost::interprocess::shared_memory_object::remove()函数来删除共享内存对象。 在编码过程中,要注意正确处理异常情况,确保在任何情况下都能正确释放共享内存资源。可以使用RAII(资源获取即初始化)技术,通过封装共享内存对象的类来自动管理资源的释放。 在设计进程间通信的架构时,要考虑到共享内存的生命周期...