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Added CLOCK_MONOTONIC trick

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Sergey Kovalevich 2015-12-22 00:20:15 +03:00
parent 01f3d6f5f0
commit 583ca02ef9
1 changed files with 23 additions and 1 deletions
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22
include/spdlog/details/os.h
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@ -35,6 +35,20 @@ namespace details
namespace os namespace os
{ {
#if defined __linux__ && defined SPDLOG_CLOCK_MONOTONIC
inline uint64_t clock_offset()
{
timespec ts_realtime;
::clock_gettime(CLOCK_REALTIME, &ts_realtime);
timespec ts_monotonic;
::clock_gettime(CLOCK_MONOTONIC, &ts_monotonic);
const uint64_t realtime = ts_realtime.tv_sec * 1000000000 + ts_realtime.tv_nsec;
const uint64_t monotonic = ts_monotonic.tv_sec * 1000000000 + ts_monotonic.tv_nsec;
return realtime - monotonic;
}
#endif
inline spdlog::log_clock::time_point now() inline spdlog::log_clock::time_point now()
{ {
@ -45,6 +59,14 @@ inline spdlog::log_clock::time_point now()
std::chrono::duration_cast<typename log_clock::duration>( std::chrono::duration_cast<typename log_clock::duration>(
std::chrono::seconds(ts.tv_sec) + std::chrono::nanoseconds(ts.tv_nsec))); std::chrono::seconds(ts.tv_sec) + std::chrono::nanoseconds(ts.tv_nsec)));
#elif defined __linux__ && defined SPDLOG_CLOCK_MONOTONIC
static const auto offset = std::chrono::nanoseconds(clock_offset());
timespec ts;
::clock_gettime(CLOCK_MONOTONIC, &ts);
return std::chrono::time_point<log_clock, typename log_clock::duration>(
std::chrono::duration_cast<typename log_clock::duration>(
offset + std::chrono::seconds(ts.tv_sec) + std::chrono::nanoseconds(ts.tv_nsec)));
#else #else
return log_clock::now(); return log_clock::now();
#endif #endif