xref: /libuv/test/test-hrtime.c (revision 011a1ac1)
1 /* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
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14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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20  */
21 
22 #include "uv.h"
23 #include "task.h"
24 
25 #ifndef MILLISEC
26 # define MILLISEC 1000
27 #endif
28 
29 #ifndef NANOSEC
30 # define NANOSEC ((uint64_t) 1e9)
31 #endif
32 
33 
TEST_IMPL(hrtime)34 TEST_IMPL(hrtime) {
35   uint64_t a, b, diff;
36   int i = 75;
37   while (i > 0) {
38     a = uv_hrtime();
39     uv_sleep(45);
40     b = uv_hrtime();
41 
42     diff = b - a;
43 
44     /* The windows Sleep() function has only a resolution of 10-20 ms. Check
45      * that the difference between the two hrtime values has a reasonable
46      * lower bound.
47      */
48     ASSERT_UINT64_GT(diff, (uint64_t) 25 * NANOSEC / MILLISEC);
49     --i;
50   }
51   return 0;
52 }
53 
54 
TEST_IMPL(clock_gettime)55 TEST_IMPL(clock_gettime) {
56   uv_timespec64_t t;
57 
58   ASSERT_EQ(UV_EINVAL, uv_clock_gettime(1337, &t));
59   ASSERT_EQ(UV_EFAULT, uv_clock_gettime(1337, NULL));
60   ASSERT_OK(uv_clock_gettime(UV_CLOCK_MONOTONIC, &t));
61   ASSERT_OK(uv_clock_gettime(UV_CLOCK_REALTIME, &t));
62   ASSERT_GT(1682500000000ll, t.tv_sec);  /* 2023-04-26T09:06:40.000Z */
63 
64   return 0;
65 }
66