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/*
* High Resolution Timestamp Entropy Source
* (C) 1999-2009,2011,2014,2016 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/internal/hres_timer.h>
#include <botan/internal/os_utils.h>
#if defined(BOTAN_TARGET_OS_HAS_CLOCK_GETTIME)
#include <time.h>
#endif
namespace Botan {
/*
* Get the timestamp
*/
void High_Resolution_Timestamp::poll(Entropy_Accumulator& accum)
{
accum.add(OS::get_processor_timestamp(), BOTAN_ENTROPY_ESTIMATE_TIMESTAMPS);
accum.add(OS::get_system_timestamp_ns(), BOTAN_ENTROPY_ESTIMATE_TIMESTAMPS);
#if defined(BOTAN_TARGET_OS_HAS_CLOCK_GETTIME)
#define CLOCK_GETTIME_POLL(src) \
do { \
struct timespec ts; \
::clock_gettime(src, &ts); \
accum.add(&ts, sizeof(ts), BOTAN_ENTROPY_ESTIMATE_TIMESTAMPS); \
} while(0)
#if defined(CLOCK_REALTIME)
CLOCK_GETTIME_POLL(CLOCK_REALTIME);
#endif
#if defined(CLOCK_MONOTONIC)
CLOCK_GETTIME_POLL(CLOCK_MONOTONIC);
#endif
#if defined(CLOCK_MONOTONIC_RAW)
CLOCK_GETTIME_POLL(CLOCK_MONOTONIC_RAW);
#endif
#if defined(CLOCK_PROCESS_CPUTIME_ID)
CLOCK_GETTIME_POLL(CLOCK_PROCESS_CPUTIME_ID);
#endif
#if defined(CLOCK_THREAD_CPUTIME_ID)
CLOCK_GETTIME_POLL(CLOCK_THREAD_CPUTIME_ID);
#endif
#undef CLOCK_GETTIME_POLL
#endif
}
}
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