System::Threading::Mutex class

Mutex class

Mutex implemnetation. Objects of this class should only be allocated using System::MakeObject() function. Never create instance of this type on stack or using operator new, as it will result in runtime errors and/or assertion faults. Always wrap this class into System::SmartPtr pointer and use this pointer to pass it to functions as argument.

class Mutex : public System::Threading::WaitHandle

方法

方法	描述
Mutex()	RTTI 信息。
Mutex(bool)	构造函数。
Mutex(bool, const String&)	构造函数。
ReleaseMutex()	释放互斥体。
static Remove(const String&)	删除系统中的已命名互斥体。
virtual Reset()	重置互斥体状态。未实现。
virtual Set()	将互斥体设置为已发信号状态。未实现。
WaitOne() override	锁定互斥体。如有必要，执行无限等待。
WaitOne(int) override	锁定互斥体。如有必要，执行等待。
WaitOne(TimeSpan) override	锁定互斥体。如有必要，执行等待。

字段

字段	描述
static WaitTimeout	特殊值由函数返回；否则返回数组中已发信号对象的索引，如果超时且没有任何信号。

备注

#include "system/threading/mutex.h"
#include "system/threading/thread.h"
#include "system/console.h"
#include "system/convert.h"
#include "system/smart_ptr.h"
#include "system/string.h"

int main()
{
  auto mutex = System::MakeObject<System::Threading::Mutex>();

  System::String str;

  const int THREADS_COUNT = 3;
  std::vector<System::SharedPtr<System::Threading::Thread>> threads;
  threads.reserve(THREADS_COUNT);

  for (auto i = 0; i < THREADS_COUNT; ++i)
  {
    threads.push_back(System::MakeObject<System::Threading::Thread>([&mutex, &str]()
    {
      mutex->WaitOne();

      str += u"Thread " + System::Convert::ToString(System::Threading::Thread::GetCurrentThreadId()) + u" started." + System::Environment::get_NewLine();

      System::Threading::Thread::Sleep(200);

      str += u"Thread " + System::Convert::ToString(System::Threading::Thread::GetCurrentThreadId()) + u" ended." + System::Environment::get_NewLine();

      mutex->ReleaseMutex();
    }));

    threads[i]->Start();
  }

  System::Threading::Thread::Sleep(700);

  System::Console::WriteLine(str);

  return 0;
}
/*
This code example produces the following output:
Thread 1 started.
Thread 1 ended.
Thread 2 started.
Thread 2 ended.
Thread 3 started.
Thread 3 ended.
*/

另见

System::Threading::Monitor 类 System::Threading::Semaphore 类