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37 lines
567 B
C++
37 lines
567 B
C++
#pragma once
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class semaphore_t
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{
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// semaphore mutex
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std::mutex m_mutex;
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// semaphore condition variable
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std::condition_variable m_cv;
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struct alignas(8) sync_var_t
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{
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u32 value; // current semaphore value
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u32 waiters; // current amount of waiters
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};
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// current semaphore value
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atomic_t<sync_var_t> m_var;
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public:
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// max semaphore value
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const u32 max_value;
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semaphore_t(u32 max_value = 1, u32 value = 0)
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: m_var(sync_var_t{ value, 0 })
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, max_value(max_value)
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{
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}
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bool try_wait();
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bool try_post();
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void wait();
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bool post_and_wait();
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}; |