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std::timed_mutex::try_lock

提供: cppreference.com
< cpp‎ | thread‎ | timed mutex

 
 
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::timed_mutex
メンバ関数
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Member functions
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timed_mutex::timed_mutex
ロック
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Locking
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timed_mutex::lock
timed_mutex::try_lock
timed_mutex::try_lock_for
timed_mutex::try_lock_until
timed_mutex::unlock
ネイティブハンドル
Original:
Native handle
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timed_mutex::native_handle
 
bool try_lock();
(C + + 11以来)
mutexをロックしようとします。すぐに戻ります。 true成功したロック取得のリターンで、そうでなければfalse返し.
Original:
Tries to lock the mutex. Returns immediately. On successful lock acquisition returns true, otherwise returns false.
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目次

[編集] パラメータ

(なし)
Original:
(none)
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[編集] 値を返します

trueロックが取得された場合は成功し、そうでなければfalse.
Original:
true if the lock was acquired successfully, otherwise false.
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[編集] 例外

[編集]

この例では、ロック、try_lockとアクションでロック解除を示しています
Original:
This example shows lock, try_lock and unlock in action
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#include <iostream>
#include <mutex>
 
int main()
{
    std::mutex test;
    if (test.try_lock()==true)
        std::cout << "lock acquired" << std::endl;
    else
        std::cout << "lock not acquired" << std::endl;
    test.unlock();	//now unlock the mutex
    test.lock();	//to lock it again
    if (test.try_lock())  //true can be left out
        std::cout << "lock acquired" << std::endl;
    else
        std::cout << "lock not acquired" << std::endl;
    test.lock(); //and now the finale (a block)
}

Output:

lock acquired
lock not acquired
(program hangs)

[編集] も参照してください

ミューテックスは、ミューテックスが使用できない場合はブロックし、ロックします
Original:
locks the mutex, blocks if the mutex is not available
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(パブリックメンバ関数) [edit]
ミューテックスは、指定されたタイムアウト期間のbeen
unavailable持っている場合、返品をmutexをロックしようとします
Original:
tries to lock the mutex, returns if the mutex has been
unavailable for the specified timeout duration
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(パブリックメンバ関数) [edit]
、mutexをロックしようとし、指定された時点に達するまで、ミューテックスがbeen
unavailable持っている場合を返します
Original:
tries to lock the mutex, returns if the mutex has been
unavailable until specified time point has been reached
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(パブリックメンバ関数) [edit]
ミューテックスのロックを解除します
Original:
unlocks the mutex
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(パブリックメンバ関数) [edit]