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std::lock_guard

提供: cppreference.com
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スレッドのサポートライブラリ
スレッド
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Threads
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thread(C++11)
this_thread空間
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this_thread namespace
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get_id(C++11)
yield(C++11)
sleep_for(C++11)
sleep_until(C++11)
相互排除
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Mutual exclusion
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mutex(C++11)
timed_mutex(C++11)
汎用のロック管理
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Generic lock management
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lock_guard(C++11)
unique_lock(C++11)
defer_lock_t
try_to_lock_t
adopt_lock_t
(C++11)
(C++11)
(C++11)
lock(C++11)
try_lock(C++11)
defer_lock
try_to_lock
adopt_lock
(C++11)
(C++11)
(C++11)
条件変数
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Condition variables
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condition_variable(C++11)
condition_variable_any(C++11)
notify_all_at_thread_exit(C++11)
cv_status(C++11)
先物
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Futures
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promise(C++11)
future(C++11)
shared_future(C++11)
packaged_task(C++11)
async(C++11)
launch(C++11)
future_status(C++11)
future_error(C++11)
future_category(C++11)
future_errc(C++11)
 
std::lock_guard
メンバ関数
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Member functions
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lock_guard::lock_guard
lock_guard::~lock_guard
 
Defined in header <mutex>
template< class Mutex >
class lock_guard;
(C++11およびそれ以降)
クラスlock_guardはスコープのブロックの持続時間のためにミューテックスを所有するための便利なRAIIスタイルメカニズムを提供してミューテックスラッパーです.
Original:
The class lock_guard is a mutex wrapper that provides a convenient RAIIスタイル mechanism for owning a mutex for the duration of a scoped block.
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lock_guardオブジェクトが作成されると、それが指定されているミューテックスの所有権を取得しようとします。コントロールがlock_guardオブジェクトが作成された範囲を離れると、lock_guardが破壊され、ミューテックスが解放され.
Original:
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.
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lock_guardクラスは非コピー可能です。供給MutexタイプはBasicLockableコンセプトを実装しなければならない.
Original:
The lock_guard class is non-copyable. The supplied Mutex type shall implement the BasicLockable concept.
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[編集] メンバータイプ

メンバー·タイプ
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Member type
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Definition
mutex_type
ミューテックス
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Mutex
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[編集] メンバ関数

オプションで、任意のミューテックスをロックして、lock_guardを構築します
Original:
constructs a lock_guard, optionally locking the given mutex
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(パブリックメンバ関数) [edit]
lock_guardオブジェクトを破棄し、基礎ミューテックスのロックが解除されます
Original:
destructs the lock_guard object, unlocks the underlying mutex
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(パブリックメンバ関数) [edit]

[編集]

#include <thread>
#include <mutex>
 
int g_i = 0;
std::mutex g_i_mutex;  // protects g_i
 
void safe_increment()
{
    std::lock_guard<std::mutex> lock(g_i_mutex);
    ++g_i;
 
    // g_i_mutex is automatically released when lock
    // goes out of scope
}
 
int main()
{
    std::thread t1(safe_increment);
    std::thread t2(safe_increment);
 
    t1.join();
    t2.join();
}