Add a helper function to check if a struct timespec is zero. This helper
will be used in the upcoming commits to transition the Weston codebase
to struct timespec.
Signed-off-by: Alexandros Frantzis <alexandros.frant...@collabora.com>
---
Changes in v2:
- Use designated initializers to initialize members of struct timespec
in test.
shared/timespec-util.h | 12 ++++++++++++
tests/timespec-test.c | 11 +++++++++++
2 files changed, 23 insertions(+)
diff --git a/shared/timespec-util.h b/shared/timespec-util.h
index 34a120ae..7260dc8b 100644
--- a/shared/timespec-util.h
+++ b/shared/timespec-util.h
@@ -29,6 +29,7 @@
#include <stdint.h>
#include <assert.h>
#include <time.h>
+#include <stdbool.h>
#define NSEC_PER_SEC 1000000000
@@ -133,6 +134,17 @@ timespec_sub_to_msec(const struct timespec *a, const
struct timespec *b)
return timespec_sub_to_nsec(a, b) / 1000000;
}
+/* Check if a timespec is zero
+ *
+ * \param a timespec
+ * \return whether the timespec is zero
+ */
+static inline bool
+timespec_is_zero(const struct timespec *a)
+{
+ return a->tv_sec == 0 && a->tv_nsec == 0;
+}
+
/* Convert milli-Hertz to nanoseconds
*
* \param mhz frequency in mHz, not zero
diff --git a/tests/timespec-test.c b/tests/timespec-test.c
index a5039110..4e83605d 100644
--- a/tests/timespec-test.c
+++ b/tests/timespec-test.c
@@ -164,3 +164,14 @@ ZUC_TEST(timespec_test, timespec_sub_to_msec)
b.tv_nsec = 1000000L;
ZUC_ASSERT_EQ((998 * 1000) + 1, timespec_sub_to_msec(&a, &b));
}
+
+ZUC_TEST(timespec_test, timespec_is_zero)
+{
+ struct timespec zero = { 0 };
+ struct timespec non_zero_sec = { .tv_sec = 1, .tv_nsec = 0 };
+ struct timespec non_zero_nsec = { .tv_sec = 0, .tv_nsec = 1 };
+
+ ZUC_ASSERT_TRUE(timespec_is_zero(&zero));
+ ZUC_ASSERT_FALSE(timespec_is_zero(&non_zero_nsec));
+ ZUC_ASSERT_FALSE(timespec_is_zero(&non_zero_sec));
+}
--
2.14.1
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