52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
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#ifndef __COUNTDOWNLATCH_NIPUN__
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#define __COUNTDOWNLATCH_NIPUN__
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#include <cinttypes>
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#include <cstdint>
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#include <mutex>
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#include <condition_variable>
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namespace clatch
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{
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class countdownlatch {
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public:
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/*! Constructor
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\param count, the value the countdownlatch object should be initialized with
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*/
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explicit countdownlatch(uint32_t count);
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/*!
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await causes the caller to wait until the latch is counted down to zero,
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if wait time nanosecs is not zero, then maximum wait is for nanosec nanoseconds
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\param nanosecs is waittime in nanoseconds, by default it is zero which specifies
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indefinite wait
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*/
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void await(uint64_t nanosecs=0);
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/*!
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Countdown decrements the count of the latch, signalling all waiting thread if the
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count reaches zero.
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*/
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void count_down();
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/*!
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get_count returns the current count
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*/
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uint32_t get_count();
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private:
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std::condition_variable cv;
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std::mutex lock;
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uint32_t count;
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// deleted constructors/assignmenet operators
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countdownlatch() = delete;
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countdownlatch(const countdownlatch& other) = delete;
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countdownlatch& operator=(const countdownlatch& opther) = delete;
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};
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}
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#endif
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