1) Vector的方法都是同步的(Synchronized),是线程安全的(thread-safe),而ArrayList的方法不是,由于线程的同步必然要影响性能,因此,ArrayList的性能比Vector好。2) 当Vector或ArrayList中的元素超过它的初始大小时,Vector会将它的容量翻倍,而ArrayList只增加50%的大小,这样,ArrayList就有利于节约内存空间。
public void run(){synchronized(vector){ for(int i=0;i<vector.size();i++){ vector.remove(i); } } } }); Thread printThread=new Thread(new Runnable(){ @Override public void run(){synchronized(vector){ for(int i=0;i<vector.size();i++){ System.out.println((vector.get(i))); ...
This is the normal duty of care required for thread-safe coding in general, and it applies to any shared object, no matter whether it is some kind of string object, or an STL container like a vector, or an object of some newfangled type that was authored yesterday by your team lead's...
Efficient, immutable, and thread-safe collection classes for Ruby.Hamster provides 6 Persistent Data Structures: Hash, Vector, Set, SortedSet, List, and Deque (which works as an immutable queue or stack).Hamster collections are immutable. Whenever you modify a Hamster collection, the original is...
#include "CppUnitTest.h" #include <thread> #include <vector> #include <mutex> //#define PROVE_THAT_WRITE_MESSAGE_IS_NOT_THREAD_SAFE using namespace Microsoft::VisualStudio::CppUnitTestFramework; using namespace std::chrono_literals; TEST_CLASS(BugRepro) { public: void ...
vector of threads that are initialized in the class constructor and destroyed in the destructor; thread-safe task queue for storing the work queue; other fields at the developer's discretion. ThreadPool class methods: Work method - selects the next task from the queue and executes it. This ...
std::vector<Functor> pendingFunctors_GUARDED_BY(mutex_);// 任务队列 }; Muduo在EventLoop中,使用了Linux系统中EventFd,作为wakeupChannel_的成员。这里主要为了将线程即时唤醒处理回调任务。如果你阅读过sylar的源码应该在这里会有所感知,EventLoop::wakeup()函数其实作用和sylar中的IOManager::tickle()类似。
(c)vector<map<int,string>>? (d)shared_ptr<widget>? (e)mutex? (f)condition_variable? (g)atomic<unsigned>? Hint: This is actually a two-part question, not a seven-part question. There are only two unique answers, each of which covers a subset of the cases. ...
Error_2_The type or namespace name 'Vector2' could not be found (are you missing a using directive or an assembly reference?)_ Error_96_The type or namespace name 'Button' could not be found (are you missing a using directive or an assembly reference?)_ Error: An object reference is...
∕∕ get compressed stream size size_t length; nvjpegEncodeRetrieveBitstream(nvjpeg_handle, encoder_state, NULL, &length, stream); ∕∕ get stream itself cudaStreamSynchronize(stream); std::vector jpeg(length); nvjpegEncodeRetrieveBitstream(nvjpeg_handle, encoder_state, jpeg.data(), &length, 0)...