问题描述
对于我的跨平台应用程序，我已经开始使用 Boost，但我无法理解如何实现代码来重现 Win32 的关键部分或 .Net 的 lock 的行为.
For my cross-platform application I have started to use Boost, but I can't understand how I can implement code to reproduce behavior of Win32's critical section or .Net's lock.
我想写一个方法Foo，可以从不同的线程调用来控制对共享字段的写操作.应该允许同一线程内的递归调用(Foo() -> Foo()).
I want to write a method Foo that can be called from different threads to control write operations to shared fields. Recursive calls within the same thread should be allowed (Foo() -> Foo()).
在 C# 中这个实现非常简单:
In C# this implementation is very simple:
object _synch = new object();
void Foo()
{
lock (_synch) // one thread can't be lock by him self, but another threads must wait untill
{
// do some works
if (...)
{
Foo();
}
}
}
推荐答案
通过 boost 你可以使用 boost::lock_guard<> class:
With boost you can use boost::lock_guard<> class:
class test
{
public:
void testMethod()
{
// this section is not locked
{
boost::lock_guard<boost::recursive_mutex> lock(m_guard);
// this section is locked
}
// this section is not locked
}
private:
boost::recursive_mutex m_guard;
};
PS 这些类位于 Boost.Thread 库中.
PS These classes located in Boost.Thread library.
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