NSOperation
NSOperation是基于Object-C封装的一套管理与执行线程操作的类。这个类是一个抽象类,通常情况下,我们会使用NSInvocationOperation和NSBlockOperation这两个子类进行多线程的开发,当然我们也可以写继承于NSOperation的类,封装我们自己的操作类。 1、NSOperation抽象类中提供的逻辑方法 操作开始执行 代码语言:javascript 代码运...
This function can be used to insert a new element in the queue. This function inserts a new element after its last inserted element. The process to insert a new element in the queue is called enqueue operation. Parameter:The parameter of this function is the value with which we want insert...
We're going to implement Queue using array in this article. There is few more operations supported by queue which are following.Peek − get the element at front of the queue. isFull − check if queue is full. isEmpty − check if queue is empty.Insert / Enqueue Operation...
C programming language implementation of the isempty() function − bool isempty() { if(front < 0 || front > rear) return true; else return false; } Enqueue Operation Front and rear data pointers are kept in queues. As a result, compared to stack operations, its operations are more co...
operation object leaves the object in the queue but notifies the object that it should abort its task as quickly as possible. For currently executing operations, this means that the operation object’s work code must check the cancellation state, stop what it is doing, and mark itself as ...
999 non standard linked in error A blocking operation was interrupted by a call to WSACancelBlockingCall A call to PInvoke function has unbalanced the stack. This is likely because the managed PInvoke signature does not match the unmanaged target signature. (.NET 4) A callback was made on a...
resources (in commentDefinitionResources) (Windows) Server Core for Windows Server 2012 R2 Functions by DLL (Windows) MI_OperationCallback_Class function pointer (Windows) HCLUSCRYPTPROVIDER structure (Windows) C-C++ Code Example: Reading Messages Asynchronously Using Completion Ports C-C++ Code Exampl...
varoperation:NSBlockOperation=NSBlockOperation(block: { [weakself]in self?.downloadImage() return }) //创建一个NSOperationQueue实例并添加operation varqueue:NSOperationQueue=NSOperationQueue() queue.addOperation(operation) } //定义一个下载图片的方法,线程调用 ...
They follow the given array order, for example:[A, B, C] = A -> B -> C -> completionBlock. letconcurrentOperationA=ConcurrentOperation{_in/// Your task A here}letconcurrentOperationB=ConcurrentOperation{_in/// Your task B here}queue.addChainedOperations([concurrentOperationA,concurrentOpera...