struct static_lock{ int val = 0; std::thread th; local_lock():th(std::bind(&static_lock::foo,this)){} void foo() { static std::mutex mt; mt.lock(); val = 100; std::cout<<"static_lock"<<val<<std::endl; mt.unlock(); } }; test1: int main() { static_lock l1,l2;...
在C++11之前，开发者需要手动使用锁（如std::mutex）来确保只有一个线程能创建单例实例。每次访问单例...
= __GTHREAD_RECURSIVE_MUTEX_INIT #endif ; #ifdef __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION void static_mutex::init() { __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION (&mutex); } #endif voidstatic_mutex::lock() { #ifdef __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION static __gthread_once_t once = __G...
}returninstance;}};// 初始化静态成员变量Singleton*Singleton::instance=nullptr;std::mutexSingleton::...
}template<typenameDerived,typename=typenamestd::enable_if<std::is_base_of<Base, Derived>::value>::type>voidadd(std::string pname) { std::lock_guard<std::mutex>guard(_mutex); _producers.emplace(pname, [](std::string name) {returnnewDerived(name);}); ...
std::this_thread::sleep_for(std::chrono::seconds(1)); getchar(); t1.join();t2.join();t3.join();t4.join(); return 0; } void func_a() { static int func_a_value = 0x1234; cout << "func_a_value => " << func_a_value << ", curre...
std::this_thread::sleep_for(std::chrono::seconds(1)); getchar(); t1.join();t2.join();t3.join();t4.join(); return 0; } void func_a() { static int func_a_value = 0x1234; cout << "func_a_value => " << func_a_value << ", current function = > " << __FUNCTION__...
上述代码定义了一个名为MY_VARIABLE的静态变量,类型为Mutex<i32>,初始值为0。 更新/重新初始化变量:根据具体需求,可以通过以下方式进行更新或重新初始化: 更新变量:通过获取锁并修改变量的值来更新变量。例如: 代码语言:txt 复制 use std::sync::Mutex; ...
usestd::sync::Mutex; lazy_static!{ staticrefARRAY:Mutex<Vec<u8>>=Mutex::new(vec![]); } fndo_a_call() { ARRAY.lock().unwrap().push(1); } fnmain() { do_a_call(); do_a_call(); do_a_call(); println!("called {}",ARRAY.lock().unwrap().len()); ...
#[macro_use] extern crate lazy_static; use std::sync::Mutex; lazy_static! { static ref ARRAY: Mutex<Vec<u8>> = Mutex::new(vec![]); } fn do_a_call() { ARRAY.lock().unwrap().push(1); } fn main() { do_a_call(); do_a_call(); do_a_call(); println!("called {}",...