mymutexpool.cpp

来自「linux下线程的创建、管理」· C++ 代码 · 共 47 行

#include "mymutexpool_p.h"

#include "mythread.h"

MyMutexPool *my_global_mutexpool = 0;

MyMutexPool::MyMutexPool (int size):mutex (), count (size)
{
  mutexes = new MyMutex *[count];
  for (int index = 0; index < count; ++index)
  {
    mutexes[index] = 0;
  }
}

MyMutexPool::~MyMutexPool ()
{
  MyMutexLocker locker (&mutex);

  for (int index = 0; index < count; ++index)
  {
    delete mutexes[index];

    mutexes[index] = 0;
  }
  delete[]mutexes;
  mutexes = 0;
}

MyMutex *MyMutexPool::get (void *address)
{
  int index = (int) ((unsigned long) address % count);

  if (!mutexes[index])
  {

    MyMutexLocker locker (&mutex);

    if (!mutexes[index])
    {
      mutexes[index] = new MyMutex ();
    }
  }

  return mutexes[index];
}