In regular shared memory, individual bytes are directly accessed to read or write data. Managed shared memory uses member functions such as construct(), which expects a type as a template parameter. The member function expects a name to denote the object created in the managed shared memory. T...
find_or_construct<SharedData>("Data")(); { scoped_lock<interprocess_mutex> lock(data->mutex); // 自动加锁 data->counter++; } // 读取进程同理,通过互斥锁保证原子操作 五、关键注意事项 生命周期管理 使用shared_memory_object::remove()显式删除共享内存。 托管内存(managed_shared_memory)自动...
typedef vector<ValueType, ShmemAllocator> SharedVector; int main() { // 创建托管共享内存(自动管理生命周期) managed_shared_memory segment(open_or_create, "ManagedSHM", 65536); // 构造共享vector SharedVector* vec = segment.find_or_construct<SharedVector>("MyVector") (segment.get_allocator<Valu...
} remover;//Create a new segment with given name and sizemanaged_shared_memory segment(create_only,"MySharedMemory",65536);//Initialize shared memory STL-compatible allocatorconstShmemAllocator alloc_inst (segment.get_segment_manager());//Construct a vector named "MyVector" in shared memory with...
#include <boost/interprocess/managed_shared_memory.hpp> #include <iostream> using namespace boost::interprocess; int main() { shared_memory_object::remove("Boost"); managed_shared_memory managed_shm{open_or_create, "Boost", 1024}; int *i = managed_shm.construct<int>("Integer")(99); std...
managed_shared_memory segment(create_only, "MySharedMemory", ); //Initialize shared memory STL-compatible allocator const ShmemAllocator alloc_inst (segment.get_segment_manager()); //Construct a vector named "MyVector" in shared memory with argument alloc_inst MyVector *myvector = segment.const...
而ngx_shared_memory_add不会马上创建一个共享内存，它是先登记一下共享内存的使用信息，比如名称、大小...
shared_memory_object::remove(SHM_OBJ_IDENTIFIER.c_str()); managed_shared_memory segment(create_only, SHM_OBJ_IDENTIFIER.c_str(), SHM_OBJ_SIZE); // Construct fst model within the shared memory object shmMyFstAllocator alloc_inst(segment.get_segment_manager()); ...
假设之前已经创建了共享内存,现打开前面已经创建的共享内存。 为了唯一标识一块共享内存,需要为其指定一个名称,传递给 boost::interprocess::shared_memory_object 构造函数的第二个参数指定了这个名称。 第三个,也就是最后一个参数指示应用程序如何访问共享内存。 例子应用程序能够读写共享内存,这是...
find_or_construct<String>("pParam")(syc_file.get_segment_manager()); //把锁放入内存 syc::interprocess_mutex *imtx = syc_file.find_or_construct<syc::interprocess_mutex>("imtx")(); while (1) { std::cout << "参数:" << *pParam << std::endl; if (*pParam == "Txt") { //此...