Thelock_guardclass is non-copyable. Template parameters Mutex-the type of the mutex to lock. The type must meet theBasicLockablerequirements Member types Member typeDefinition mutex_typeMutex Member functions (
std::lock_guard Member functions lock_guard::lock_guard lock_guard::~lock_guard~lock_guard(); (since C++11) Releases the ownership of the owned mutex. Effectively calls m.unlock() where m is the mutex passed to the lock_guard's constructor. ...
voidswap(CirSource&first,CirSource&second){std::lock(first.dataLock,secode.dataLock);std::lock_guard<std::mutex>lockf(first.dataLock,std::adopt_lock);std::lock_guard<std::mutex>locks(second.dataLock,std::adopt_lock);inttemp=first.n1;first.n1=second.n1;second.n1=temp;} 上面代码中从第...
When a lock_guard object is created, it attempts to take ownership of the mutex it is given. When control leaves the scope in which the lock_guard object was created, the lock_guard is destructed and the mutex is released. The lock_guard class is non-copyable. 参考: https://en.cppre...
C++ std::unique_lock与std::lock_guard 技术标签: C++std::lock_guard http://www.cplusplus.com/reference/mutex/lock_guard/ 用于托管一个mutex 变量,负责对齐加锁解锁。 A lock guard is an object that manages a mutex object by keeping it always locked. On constr... 查看原文 C++11std::lock_...
m, e2.m); std::lock_guard<std::mutex> lk1(e1.m, std::adopt_lock); std::lock_guard<std::mutex> lk2(e2.m, std::adopt_lock); // 等价代码(若需要 unique_locks ,例如对于条件变量) // std::unique_lock<std::mutex> lk1(e1.m, std::defer_lock); // std::unique_lock<std::...
lock类(两种): std::lock_guard:与mutex RAII 相关,方便线程对互斥量上锁 std::unique_lock:与mutex RAII相关,方便线程对互斥量上锁,但提供了更好的上锁和解锁控制 其他类型: std::once_flag std::adopt_lock_t std::defer_lock_t std::try_to_lock_t ...
lock()通常不直接调用:std::unique_lock和std::lock_guard用于管理独占锁定。 共享互斥不支持从共享模式到唯一所有权模式的直接转换:共享锁必须用unlock_shared()在获得独家所有权之前lock()...助推::升级[医]互斥可用于此目的。 例 这个例子显示了如何lock和unlock可用于保护共享数据。
但是,要想学会使用 std::lock_guard 和 std::unique_lock ,必须先了解基本的 std::mutex。 头文件: #include <mutex> 在头文件当中提供了四种互斥量: std::mutex 与 std::timed_mutex 先从最基本的 std::mutex 入手,其余互斥量皆是其变种。需要了解4个公共方法: ...
二、C++11标准提供两种基本锁类型std::lock_guard和std::unique_lock,其模板类型可以是以上四种锁,方便线程对互斥量锁定解锁,直到对象作用域结束。 互斥对象管理类模板的加锁策略 前面提到std::lock_guard、std::unique_lock和std::shared_lock类模板在构造时是否加锁是可选的,C++11提供了3种加锁策略。