1 files changed, 23 insertions, 0 deletions
diff --git a/clock.py b/clock.py
new file mode 100644
index 0000000..3e97dbf
--- /dev/null
+++ b/clock.py
@@ -0,0 +1,23 @@
+# Courtesy of Armin Ronacher, found at StackOverflow
+
+import ctypes
+import os
+
+CLOCK_MONOTONIC = 1 # see <linux/time.h>
+
+class timespec(ctypes.Structure):
+    _fields_ = [
+        ('tv_sec', ctypes.c_long),
+        ('tv_nsec', ctypes.c_long)
+    ]
+
+librt = ctypes.CDLL('librt.so.1', use_errno=True)
+clock_gettime = librt.clock_gettime
+clock_gettime.argtypes = [ctypes.c_int, ctypes.POINTER(timespec)]
+
+def now():
+    t = timespec()
+    if clock_gettime(CLOCK_MONOTONIC, ctypes.pointer(t)) != 0:
+        errno_ = ctypes.get_errno()
+        raise OSError(errno_, os.strerror(errno_))
+    return t.tv_sec + t.tv_nsec * 1e-9