名前空間
変種
操作

std::mutex

提供: cppreference.com
< cpp‎ | thread


 
 
スレッドのサポートライブラリ
スレッド
Original:
Threads
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
thread(C++11)
this_thread空間
Original:
this_thread namespace
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
get_id(C++11)
yield(C++11)
sleep_for(C++11)
sleep_until(C++11)
相互排除
Original:
Mutual exclusion
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
mutex(C++11)
timed_mutex(C++11)
汎用のロック管理
Original:
Generic lock management
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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
Original:
Condition variables
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
condition_variable(C++11)
condition_variable_any(C++11)
notify_all_at_thread_exit(C++11)
cv_status(C++11)
先物
Original:
Futures
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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::mutex
メンバ関数
Original:
Member functions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
mutex::mutex
ロック
Original:
Locking
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
mutex::lock
mutex::try_lock
mutex::unlock
ネイティブハンドル
Original:
Native handle
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
mutex::native_handle
 
Defined in header <mutex>
class mutex;
(C + + 11以来)
mutexクラスは、同時に複数のスレッドによってアクセスされるから共有データを保護するために使用できる同期プリミティブです.
Original:
The mutex class is a synchronization primitive that can be used to protect shared data from being simultaneously accessed by multiple threads.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
mutex排他的、非再帰的な所有権のセマンティクスを提供しています
Original:
mutex offers exclusive, non-recursive ownership semantics:
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
  • 呼び出し元のスレッドは、それはmutex呼び出しlockまたはtry_lockまでは、どちらが正常に呼び出した時からunlockを所有して.
    Original:
    A calling thread owns a mutex from the time that it successfully calls either lock or try_lock until it calls unlock.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
  • スレッドがmutexを所有している場合は、他のすべてのスレッドがブロック(lockへの呼び出しの場合)、または彼らはfalseの所有権を主張しようとした場合try_lockの戻り値を(mutex用)が表示されます.
    Original:
    When a thread owns a mutex, all other threads will block (for calls to lock) or receive a false return value (for try_lock) if they attempt to claim ownership of the mutex.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
  • 呼び出し元のスレッドが呼び出す前にmutexを所有していなければなりませんlockまたはtry_lock.
    Original:
    A calling thread must not own a mutex prior to calling lock or try_lock.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
まだいくつかのスレッドが所有している間mutexが破壊されている場合は、プログラムの動作は未定義です。 mutexクラスは非コピー可能です.
Original:
The behavior of a program is undefined if a mutex is destroyed while still owned by some thread. The mutex class is non-copyable.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

目次

[編集] メンバータイプ

メンバー·タイプ
Original:
Member type
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Definition
native_handle_type
実装定義
Original:
implementation-defined
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[編集] メンバ関数

ミューテックスを作成します
Original:
constructs the mutex
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(パブリックメンバ関数) [edit]
ロック
Original:
Locking
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(パブリックメンバ関数) [edit]
ミューテックスが使用できない場合は戻りますが、mutexをロックしようとします
Original:
tries to lock the mutex, returns if the mutex is not available
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(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
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(パブリックメンバ関数) [edit]
ネイティブハンドル
Original:
Native handle
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
基礎となる実装定義のスレッドハンドルを返します
Original:
returns the underlying implementation-defined thread handle
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(パブリックメンバ関数) [edit]

[編集]

この例では、mutexが2つのスレッド間で共有std::mapを保護するために使用できる方法を示しています。.
Original:
This example shows how a mutex can be used to protect a std::map shared between two threads.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

#include <iostream>
#include <chrono>
#include <thread>
#include <mutex>
#include <map>
#include <string>
 
std::map<std::string, std::string> g_pages;
std::mutex g_pages_mutex;
 
void save_page(const std::string &url)
{
    // simulate a long page fetch
    std::this_thread::sleep_for(std::chrono::seconds(2));
    std::string result = "fake content";
 
    g_pages_mutex.lock();
    g_pages[url] = result;
    g_pages_mutex.unlock();
}
 
int main() 
{
    std::thread t1(save_page, "http://foo");
    std::thread t2(save_page, "http://bar");
    t1.join();
    t2.join();
 
    g_pages_mutex.lock();
    for (const auto &pair : g_pages) {
        std::cout << pair.first << " => " << pair.second << '\n';
    }
    g_pages_mutex.unlock();
}

Output:

http://bar => fake content
http://foo => fake content