34 lines
1.0 KiB
C
34 lines
1.0 KiB
C
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#ifndef HGL_SEMAPHORE_INCLUDE
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#define HGL_SEMAPHORE_INCLUDE
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#ifdef __APPLE__
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#include<dispatch/dispatch.h>
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#endif//__APPLE__
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namespace hgl
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{
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/**
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* 信号是用于多线程同步中常用的一种技术<br>
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* 注意信号的用法是要有信号被发送出来，才能获取到信号。
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*/
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class Semaphore ///信号
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{
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#ifdef __APPLE__
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dispatch_semaphore_t ptr;
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#else
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void *ptr;
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#endif//__APPLE__
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public:
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Semaphore(int=1024);
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virtual ~Semaphore();
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virtual bool Post(int n=1); ///<发送信号
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virtual bool TryAcquire(); ///<尝试取得一个信号
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virtual bool Acquire(double time=0.0); ///<等待并获取一个信号
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};//class Semaphore
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}//namespace hgl
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#endif//HGL_SEMAPHORE_INCLUDE
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