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sleeper.h
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sleeper.h
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// Copyright © 2016 zendo (734181759@qq.com). All rights reserved.
#pragma once
#include <cstddef>
#include <cstdint>
#ifdef _MSC_VER
#include <intrin.h>
#endif
namespace zendo
{
class sleeper
{
private:
uint32_t spin_count_ = 0;
public:
void wait()
{
if(spin_count_ < 4000)
{
++spin_count_;
#if defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
::_mm_pause();
#elif defined(__i386__) || defined(__x86_64__)
asm volatile("pause");
#elif defined(__aarch64__) || defined(__arm__)
asm volatile("yield");
#elif defined(__powerpc64__)
asm volatile("or 27,27,27");
#endif
}
else
{
struct timespec ts = {0, 50000};
nanosleep(&ts, nullptr);
}
}
};
}