std::atomic<int> is not lock-free std::atomic_flag 是 C++ 中的一个原子布尔类型,它用于实现原子锁操作。 std::atomic_flag 默认是清除状态(false)。可以使用 ATOMIC_FLAG_INIT 宏进行初始化,例如:std::atomic_flag flag = ATOMIC_FLAG_INIT; std::atomic_flag 提供了两个成员函数 test_and_set()...
清除std::atomic_flag 对象,并设置它的值为 false,和 std::atomic::clear() 成员函数的功能相同,整个过程也是原子的,默认的内存序为memory_order_seq_cst。 atomic_flag_clear_explicit voidatomic_flag_clear (volatileatomic_flag*obj, memory_order sync) noexcept;voidatomic_flag_clear (atomic_flag* obj, ...
bool atomic_flag_test_and_set (volatile atomic_flag* obj, memory_order sync) noexcept;bool atomic_flag_test_and_set (atomic_flag* obj, memory_order sync) noexcept; 检测并设置 std::atomic_flag 的值,并返回 std::atomic_flag 的旧值,和 std::atomic::test_and_set() 成员函数的功能相同,整个...
notify_all (C++20) 提醒所有在原子对象上的等待中阻塞的线程 #include<thread>#include<vector>#include<iostream>#include<atomic>std::atomic_flag lock = ATOMIC_FLAG_INIT;voidf(intn){for(intcnt =0; cnt <100; ++cnt) {while(lock.test_and_set(std::memory_order_acquire))// 获得锁;// 自旋s...
atomic_flag_test_and_set, atomic_flag_test_and_set_explicit atomic_flag_clear, atomic_flag_clear_explicit atomic_init atomic_is_lock_free atomic_store, atomic_store_explicit atomic_load, atomic_load_explicit atomic_exchange, atomic_exchange_explicit atomic_compare_exchange_weak, atomic_compare_exch...
使用atomic_is_lock_free判断原子对子对象是否是无锁的,如果对象的所有数据类型都支持原子操作返回true。 #include<iostream>#include<stdatomic.h>intmain(intargc,constchar*argv[]){atomic_uint _atomic_int;atomic_init(&_atomic_int,1);uint32_t_a_int=0;std::cout<<atomic_is_lock_free(&_atomic_int...
C++11 atomic_fetch_sub C++11 atomic_fetch_sub_explicit C++11 atomic_fetch_xor C++11 atomic_fetch_xor_explicit C++11 atomic_flag_clear C++11 atomic_flag_clear_explicit C++11 atomic_flag_test_and_set C++11 atomic_flag_test_and_set_explicit C++11 atomic_init C++11 atomic_is_loc...
原子标记hatomic_flag_t hatomic_flag_t flag = HATOMIC_FLAG_INIT; hatomic_flag_test_and_set(&flag); // 原子测试并置位 原子数hatomic_t hatomic_t cnt = HATOMIC_VAR_INIT(0); hatomic_inc(&cnt); // 原子自增 hatomic_dec(&cnt); // 原子自减 hatomic_add(&cnt, 3); // 原子加...
| atomic_flag_clear | c89atomic_flag_clear | | atomic_flag_clear_explicit | c89atomic_flag_clear_explicit | | | c89atomic_clear_8 | | | c89atomic_clear_16 | | | c89atomic_clear_32 | | | c89atomic_clear_64 | | | c89atomic_clear_explicit_8 | ...
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