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ts_timestamp.h
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ts_timestamp.h
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#ifndef CDSLIB_CONTAINER_TS_TIMESTAMP_H
#define CDSLIB_CONTAINER_TS_TIMESTAMP_H
#include <atomic>
#include <cds/compiler/ts_hardwaretimestamp.h>
namespace cds { namespace container {
using namespace cds::tshardwaretimestamp;
class HardwareTimestamp
{
public:
inline void initialize(uint64_t delay, uint64_t num_threads)
{
}
inline void init_sentinel(uint64_t *result)
{
result[0] = 0;
}
inline void init_sentinel_atomic(std::atomic<uint64_t> *result)
{
result[0].store(0);
}
inline void init_top_atomic(std::atomic<uint64_t> *result)
{
result[0].store(UINT64_MAX);
}
inline void init_top(uint64_t *result)
{
result[0] = UINT64_MAX;
}
inline void load_timestamp(uint64_t *result, std::atomic<uint64_t> *source)
{
result[0] = source[0].load();
}
inline void set_timestamp(std::atomic<uint64_t> *result)
{
result[0].store(platform::get_hwptime());
}
inline void read_time(uint64_t *result)
{
result[0] = platform::get_hwptime();
}
inline bool is_later(uint64_t *timestamp1, uint64_t *timestamp2)
{
return timestamp2[0] < timestamp1[0];
}
};
class HardwareIntervalTimestamp
{
private:
uint64_t delay_;
public:
inline void initialize(uint64_t delay, uint64_t num_threads)
{
delay_ = delay;
}
inline void init_sentinel(uint64_t *result)
{
result[0] = 0;
result[1] = 0;
}
inline void init_sentinel_atomic(std::atomic<uint64_t> *result)
{
result[0].store(0);
result[1].store(0);
}
inline void init_top_atomic(std::atomic<uint64_t> *result)
{
result[0].store(UINT64_MAX);
result[1].store(UINT64_MAX);
}
inline void init_top(uint64_t *result)
{
result[0] = UINT64_MAX;
result[1] = UINT64_MAX;
}
inline void load_timestamp(uint64_t *result, std::atomic<uint64_t> *source)
{
result[0] = source[0].load();
result[1] = source[1].load();
}
inline void set_timestamp(std::atomic<uint64_t> *result)
{
result[0].store(platform::get_hwptime());
uint64_t wait = platform::get_hwtime() + delay_;
while (platform::get_hwtime() < wait)
{
}
result[1].store(platform::get_hwptime());
}
inline void read_time(uint64_t *result)
{
result[0] = platform::get_hwptime();
result[1] = result[0];
}
inline bool is_later(uint64_t *timestamp1, uint64_t *timestamp2)
{
return timestamp2[1] < timestamp1[0];
}
};
class AtomicCounterTimestamp
{
private:
std::atomic<uint64_t> *clock_;
public:
inline void initialize(uint64_t delay, uint64_t num_threads)
{
clock_ = new std::atomic<uint64_t>();
clock_->store(1);
}
inline void init_sentinel(uint64_t *result)
{
result[0] = 0;
}
inline void init_sentinel_atomic(std::atomic<uint64_t> *result)
{
result[0].store(0);
}
inline void init_top_atomic(std::atomic<uint64_t> *result)
{
result[0].store(UINT64_MAX);
}
inline void init_top(uint64_t *result)
{
result[0] = UINT64_MAX;
}
inline void load_timestamp(uint64_t *result, std::atomic<uint64_t> *source)
{
result[0] = source[0].load();
}
inline void set_timestamp(std::atomic<uint64_t> *result)
{
result[0].store(clock_->fetch_add(1));
}
inline void set_timestamp_local(uint64_t *result)
{
result[0] = clock_->fetch_add(1);
}
inline void read_time(uint64_t *result)
{
result[0] = clock_->load();
}
inline bool is_later(uint64_t *timestamp1, uint64_t *timestamp2)
{
return timestamp2[0] < timestamp1[0];
}
};
}} // namespace cds::container
#endif // #ifndef CDSLIB_CONTAINER_TS_TIMESTAMP_H