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shared: Add timespec_to_proto helper function

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Add helper function to convert from struct timespec values to tv_sec_hi,
tv_sec_lo, tv_nsec triplets used for sending high-resolution timestamp
data over the wayland protocol. Replace existing conversion code with
the helper function.

Signed-off-by: Alexandros Frantzis <alexandros.frantzis@collabora.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
This commit is contained in:
Alexandros Frantzis
2017-12-13 13:27:54 +02:00
committed by Pekka Paalanen
parent 787fa611de
commit 10d708d268
3 changed files with 58 additions and 4 deletions
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tests/timespec-test.c
+29
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@@ -79,6 +79,35 @@ ZUC_TEST(timespec_test, timespec_to_msec)
ZUC_ASSERT_EQ(timespec_to_msec(&a), (4000ULL) + 4);
}
ZUC_TEST(timespec_test, timespec_to_proto)
{
struct timespec a;
uint32_t tv_sec_hi;
uint32_t tv_sec_lo;
uint32_t tv_nsec;
a.tv_sec = 0;
a.tv_nsec = 0;
timespec_to_proto(&a, &tv_sec_hi, &tv_sec_lo, &tv_nsec);
ZUC_ASSERT_EQ(0, tv_sec_hi);
ZUC_ASSERT_EQ(0, tv_sec_lo);
ZUC_ASSERT_EQ(0, tv_nsec);
a.tv_sec = 1234;
a.tv_nsec = NSEC_PER_SEC - 1;
timespec_to_proto(&a, &tv_sec_hi, &tv_sec_lo, &tv_nsec);
ZUC_ASSERT_EQ(0, tv_sec_hi);
ZUC_ASSERT_EQ(1234, tv_sec_lo);
ZUC_ASSERT_EQ(NSEC_PER_SEC - 1, tv_nsec);
a.tv_sec = (time_t)0x7000123470005678LL;
a.tv_nsec = 1;
timespec_to_proto(&a, &tv_sec_hi, &tv_sec_lo, &tv_nsec);
ZUC_ASSERT_EQ((uint64_t)a.tv_sec >> 32, tv_sec_hi);
ZUC_ASSERT_EQ(0x70005678, tv_sec_lo);
ZUC_ASSERT_EQ(1, tv_nsec);
}
ZUC_TEST(timespec_test, millihz_to_nsec)
{
ZUC_ASSERT_EQ(millihz_to_nsec(60000), 16666666);