{//boost::interprocess::shared_memory_object类是按照单个字节的方式读写共享内存,用起来不方便boost::interprocess::shared_memory_object::remove("Highscore"); boost::interprocess::managed_shared_memory managed_shm(boost::interprocess::open_or_create,"Highscore",1024);//分配1024字节//boost不能直接写入...
A-2:std::shared_ptr 在循环引用的场景下使用 假设我们有两个类 A 和B,它们互相引用对方。为了避免循环引用导致的内存泄漏,我们可以使用 std::shared_ptr 和std::weak_ptr 来管理它们的生命周期。 // 循环引用的使用场景 #include <iostream> #include <memory> class B;//前向声明 class A{ public : ...
这样,使用AllocateShared 直接就可以返回一个std::shared_ptr<Object>对象: std::shared_ptr<Object> = AllocateShared<Object>(); 实验 对这两种方法进行了对比,使用 AppShift-MemoryPool 作为内存池,一次创建N个 std::shared_ptr<object>的耗时,其中Object的大小大约2kb左右,测试结果如下,引入内存池后有明显...
{ shm_remove() { shared_memory_object::remove("MySharedMemory"); }~shm_remove(){ shared_memory_object::remove("MySharedMemory"); } } remover;//Create a new segment with given name and sizemanaged_shared_memory segment(create_only,"MySharedMemory",65536);//Initialize shared memory STL-c...
boost::interprocess::managed_shared_memory(2)(std::string) 2014-05-27 23:51 − #include <iostream> #include <boost/interprocess/managed_shared_memory.hpp> #include <boost/interprocess/allocators/allocator.hpp> ... zzyoucan 0 2219 boost::interprocess::shared_memory_object(1)(基本类型) ...
All member functions (including copy constructor and copy assignment) can be called by multiple threads on different instances of shared_ptr without additional synchronization even if these instances are copies and share ownership of the same object. If multiple threads of execution access the same in...
push_back(1); v.emplace_back(2); std::vector<int> local_row = {1,2,3}; v.emplace_back(local_row.begin(), local_row.end()); bi::shared_memory_object::remove("Demo"); }参阅allocator_traits (C++11) 提供关于分配器类型的信息 (类模板) uses_allocator (C++11) 检查指定的类型...
std::shared_ptr允许多个指针实例共享对同一对象的所有权。它使用引用计数机制来管理对象的生命周期。 #include <memory> int main() { std::shared_ptr<MyClass> sharedPtr1(new MyClass()); std::shared_ptr<MyClass> sharedPtr2 = sharedPtr1; ...
我发现一些代码使用std :: shared_ptr在关机时执行任意清理。起初,我认为此代码可能无法工作,但随后尝试了以下操作: #include <memory> #include <iostream> #include <vector> class test { public: test() { std::cout << "Test created" << std::endl; ...
std::launch::async模式的调用将在另一个线程中执行。且在future(设立没有把state share出去所以这里的满足the current object was the last reference to the shared state.)析构的时候会阻塞等到futureready。 由于栈上后构造的对象先释放,所以这里lambda里引用了栈上变量也不会有什么问题。但是这里Crash了,那么我...