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Diffstat (limited to 'src/lib/netlist/plib/pchrono.cpp')
-rw-r--r--src/lib/netlist/plib/pchrono.cpp55
1 files changed, 55 insertions, 0 deletions
diff --git a/src/lib/netlist/plib/pchrono.cpp b/src/lib/netlist/plib/pchrono.cpp
new file mode 100644
index 00000000000..3beb3b2f161
--- /dev/null
+++ b/src/lib/netlist/plib/pchrono.cpp
@@ -0,0 +1,55 @@
+// license:GPL-2.0+
+// copyright-holders:Couriersud
+
+#include <chrono>
+
+#include "pchrono.h"
+
+namespace plib {
+namespace chrono {
+
+
+#if defined(__x86_64__) && !defined(_clang__) && !defined(_MSC_VER) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 6))
+
+fast_ticks::type fast_ticks::per_second()
+{
+ static type persec = 0;
+ if (persec == 0)
+ {
+ type x = 0;
+ system_ticks::type t = system_ticks::start();
+ system_ticks::type e;
+ x = -start();
+ do {
+ e = system_ticks::stop();
+ } while (e - t < system_ticks::per_second() / 100 );
+ x += stop();
+ persec = (type)(double)((double) x * (double) system_ticks::per_second() / double (e - t));
+ }
+ return persec;
+}
+
+#if PUSE_ACCURATE_STATS && PHAS_RDTSCP
+exact_ticks::type exact_ticks::per_second()
+{
+ static type persec = 0;
+ if (persec == 0)
+ {
+ type x = 0;
+ system_ticks::type t = system_ticks::start();
+ system_ticks::type e;
+ x = -start();
+ do {
+ e = system_ticks::stop();
+ } while (e - t < system_ticks::per_second() / 100 );
+ x += stop();
+ persec = (type)(double)((double) x * (double) system_ticks::per_second() / double (e - t));
+ }
+ return persec;
+}
+#endif
+
+#endif
+
+}
+}