30 lines
582 B
C++
30 lines
582 B
C++
#ifndef MEMGRAPH_UTILS_SYNC_SPINLOCK_HPP
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#define MEMGRAPH_UTILS_SYNC_SPINLOCK_HPP
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#include <atomic>
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#include <unistd.h>
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class SpinLock
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{
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public:
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void lock()
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{
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// TODO add asm_pause and counter first before sleeping
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// might be faster, but test this and see
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while(lock_flag.test_and_set(std::memory_order_acquire))
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usleep(250);
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}
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void unlock()
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{
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lock_flag.clear(std::memory_order_release);
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}
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private:
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// guaranteed by standard to be lock free!
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std::atomic_flag lock_flag = ATOMIC_FLAG_INIT;
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};
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#endif
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