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comparison clock.pyx @ 0:1c0396a8fff4 default tip

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Import
author Daniele Nicolodi <daniele.nicolodi@obspm.fr>
date Fri, 03 Jul 2015 21:00:16 +0200
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-1:000000000000 0:1c0396a8fff4
1 from libc.errno cimport *
2 from libc.stdio cimport snprintf
3
4 cdef extern from "time.h":
5 ctypedef long time_t
6 cdef struct _timespec "timespec":
7 time_t tv_sec
8 long tv_nsec
9 cdef enum:
10 CLOCK_MONOTONIC
11 CLOCK_REALTIME
12 cdef enum:
13 TIMER_ABSTIME
14 int clock_gettime(int id, _timespec *tp) nogil
15 int clock_nanosleep(int id, int flags,
16 _timespec *request,
17 _timespec *remain) nogil
18
19
20 cdef class timespec:
21 cdef _timespec t
22
23 def __init__(self, long sec=0, long nsec=0):
24 self.t.tv_sec = sec
25 self.t.tv_nsec = nsec
26
27 property sec:
28 def __get__(self):
29 return self.t.tv_sec
30 def __set__(self, long v):
31 self.t.tv_sec = v
32
33 property nsec:
34 def __get__(self):
35 return self.t.tv_nsec
36 def __set__(self, long v):
37 self.t.tv_nsec = v
38 while self.t.tv_nsec >= 1000000000:
39 self.t.tv_sec += 1
40 self.t.tv_nsec -= 1000000000
41
42 def __add__(self, long v):
43 self.sec += v
44 return self
45
46 def __float__(self):
47 return self.t.tv_sec + self.t.tv_nsec * 1e-9
48
49 def __repr__(self):
50 cdef char[64] s
51 snprintf(s, 64, "{ sec=%ld nsec=%ld }", self.t.tv_sec, self.t.tv_nsec)
52 return s
53
54
55 def gettime(clockid=CLOCK_REALTIME):
56 t = timespec()
57 clock_gettime(clockid, &t.t)
58 return t
59
60
61 def nanosleep(timespec request, int clockid=CLOCK_REALTIME, bint absolute=False):
62 cdef _timespec remain
63 cdef int flags = 0
64 cdef int r
65 cdef _timespec *t = &request.t
66
67 if absolute:
68 flags = flags | TIMER_ABSTIME
69
70 with nogil:
71 while 1:
72 r = clock_nanosleep(clockid, flags, t, &remain)
73 if r == EINTR:
74 if not absolute:
75 t = &remain
76 continue
77 break
78
79 if r != 0:
80 raise ValueError