System::Threading::ThreadPool class

ThreadPool class

Thread pool API allowing it pushing jobs into queue to be read by pool of worker threads. This is a static type with no instance services. You should never create instances of it by any means.

class ThreadPool : public System::Object

Metoder

MetodBeskrivning
static GetAvailableThreads(int&, int&)Hämtar antalet tillgängliga trådar.
static GetInstance()RTTI-information.
static GetMaxThreads(int&, int&)Hämtar maximalt antal samtidiga trådar.
static GetMinThreads(int&, int&)Hämtar minimalt antal trådar som skapas av poolen.
static JoinAllThreads()Förenar alla ägda trådar. Väntar oändligt.
operator=(const ThreadPool&)Ingen kopiering.
static QueueUserWorkItem(WaitCallback)Lägger till arbetsobjekt i kö som finns med en callback utan parametrar.
static QueueUserWorkItem(WaitCallback, const System::SharedPtr<System::Object>&)Lägger till arbetsobjekt i kö som finns med en callback utan parametrar.
static SetMaxThreads(int, int)Ställer in antalet trådar som ägs av poolen.
static SetMinThreads(int, int)Ställer in minimalt antal trådar som ägs av poolen.
ThreadPool(const ThreadPool&)Ingen kopiering.

Anmärkningar

#include "system/threading/thread_pool.h"
#include "system/threading/thread.h"
#include "system/object.h"
#include "system/smart_ptr.h"
#include <iostream>
#include <mutex>
#include <string>
#include <thread>

const std::string &BooleanToString(bool value)
{
  static const std::string True = "True";
  static const std::string False = "False";

  return value ? True : False;
}

int main()
{
  using namespace System::Threading;
  std::mutex m;

  const auto threadsCount = std::thread::hardware_concurrency();

  for (unsigned int i = 0; i < threadsCount; ++i)
  {
    ThreadPool::QueueUserWorkItem([&m](System::SharedPtr<System::Object> object) -> void {
      auto thread = Thread::get_CurrentThread();
      m.lock();
      std::cout << "Background: " << BooleanToString(thread->get_IsBackground()) <<
        ", Thread pool: " << BooleanToString(thread->get_IsThreadPoolThread()) <<
        ", Thread ID: " << thread->get_ManagedThreadId() << std::endl;
      m.unlock();
    });
  }

  ThreadPool::JoinAllThreads();

  return 0;
}
/*
This code example produces the following output:
Background: True, Thread pool: True, Thread ID: 1
Background: True, Thread pool: True, Thread ID: 3
Background: True, Thread pool: True, Thread ID: 5
Background: True, Thread pool: True, Thread ID: 6
Background: True, Thread pool: True, Thread ID: 9
Background: True, Thread pool: True, Thread ID: 1
Background: True, Thread pool: True, Thread ID: 7
Background: True, Thread pool: True, Thread ID: 2
Background: True, Thread pool: True, Thread ID: 4
Background: True, Thread pool: True, Thread ID: 3
Background: True, Thread pool: True, Thread ID: 12
Background: True, Thread pool: True, Thread ID: 8
Background: True, Thread pool: True, Thread ID: 5
Background: True, Thread pool: True, Thread ID: 6
Background: True, Thread pool: True, Thread ID: 16
Background: True, Thread pool: True, Thread ID: 11
*/

Se även

System::Threading::Thread klass System::Threading::ThreadPoolImpl klass