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;...
3. 同步机制：如果无法避免共享资源，那么应该引入适当的同步机制，比如互斥锁（std::mutex）、读写锁等...
static std::mutex mtx; std::lock_guard<std::mutex> lock(mtx); count++; printf("安全计数:%d",count); 初始化特性方面,static变量支持零初始化和常量表达式初始化。若未显式初始化,编译器会自动将其初始化为零值。对于需要复杂初始化的场景,可通过静态构造函数(C++)或首次调用时初始化等方式实现。需要注...
Singleton() : value_(0) { std::cout << "Singleton::Singleton()" << std::endl; } Singleton(const Singleton&) = delete; Singleton& operator=(const Singleton&) = delete; ~Singleton() { std::cout << "Singleton::~Singleton()" << std::endl; } ...
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 = __GTHREAD_ONCE_INIT; __gthread_once (&once, init); ...
classLogger{private: Logger();staticvoidlog(conststring& tag,conststring& msg,intlevel);staticMutex mutex;public:staticvoidfatal(conststring&,conststring&);staticvoiderror(conststring&,conststring&);staticvoidwarn(conststring&,conststring&);staticvoiddebug(conststring&,conststring&);staticvoidinfo(con...
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()); ...
class static_mutex { static __gthread_recursive_mutex_t mutex; #ifdef __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION static void init(); #endif public: static void lock(); static void unlock(); }; __gthread_recursive_mutex_t static_mutex::mutex #ifdef __GTHREAD_RECURSIVE_MUTEX_INIT = __...
void test() { lock_guard<mutex> lock(mutexRef()); // No C26110 (failing to hold lock) } Fixed a compilation failure of code snippets relying on guaranteed copy elision during code analysis. Copy struct S { S(const S& o) = delete; ...
use lazy_static::lazy_static; use std::sync::Mutex; struct Config { db_url: String, db_user: String, } lazy_static! { static ref CONFIG: Mutex<Config> = Mutex::new(Config { db_url: "postgres://user:pass@localhost/database".to_string(), db_user: "admin".to_string(), }); ...