[v5,1/3] eal: add timespec_get shim
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Commit Message
C11 timespec_get() is not provided on some platforms:
* MinGW-w64 does not currently implement it [1].
* FreeBSD 11 with Clang 10.0.0 does not provide it.
Add internal shims to Windows and FreeBSD EALs.
For Windows, it can be removed after [1] is fixed.
[1]: https://sourceforge.net/p/mingw-w64/mailman/message/37224689/
Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
Acked-by: Jie Zhou <jizh@linux.microsoft.com>
Acked-by: Nick Connolly <nick.connolly@mayadata.io>
---
lib/eal/freebsd/include/rte_os_shim.h | 17 ++++++++++++++
lib/eal/windows/include/rte_os_shim.h | 32 +++++++++++++++++++++++++++
2 files changed, 49 insertions(+)
@@ -3,6 +3,8 @@
#ifndef _RTE_OS_SHIM_
#define _RTE_OS_SHIM_
+#include <time.h>
+
#include <rte_os.h>
/**
@@ -11,4 +13,19 @@
* Provides semi-standard OS facilities by convenient names.
*/
+#ifndef TIME_UTC
+
+#define TIME_UTC 1
+
+static inline int
+rte_timespec_get(struct timespec *now, int base)
+{
+ if (base != TIME_UTC || clock_gettime(CLOCK_REALTIME, now) < 0)
+ return 0;
+ return base;
+}
+
+#define timespec_get(ts, base) rte_timespec_get(ts, base)
+
+#endif /* !defined TIME_UTC */
#endif /* _RTE_OS_SHIM_ */
@@ -3,7 +3,10 @@
#ifndef _RTE_OS_SHIM_
#define _RTE_OS_SHIM_
+#include <time.h>
+
#include <rte_os.h>
+#include <rte_windows.h>
/**
* @file
@@ -33,4 +36,33 @@
#define IPPROTO_SCTP 132
#endif
+#ifdef RTE_TOOLCHAIN_GCC
+
+#define TIME_UTC 1
+
+static inline int
+rte_timespec_get(struct timespec *now, int base)
+{
+ /* 100ns ticks from 1601-01-01 to 1970-01-01 */
+ static const uint64_t EPOCH = 116444736000000000ULL;
+ static const uint64_t TICKS_PER_SEC = 10000000;
+ static const uint64_t NS_PER_TICK = 100;
+
+ FILETIME ft;
+ uint64_t ticks;
+
+ if (base != TIME_UTC)
+ return 0;
+
+ GetSystemTimePreciseAsFileTime(&ft);
+ ticks = ((uint64_t)ft.dwHighDateTime << 32) | ft.dwLowDateTime;
+ ticks -= EPOCH;
+ now->tv_sec = ticks / TICKS_PER_SEC;
+ now->tv_nsec = (ticks - now->tv_sec * TICKS_PER_SEC) * NS_PER_TICK;
+ return base;
+}
+
+#define timespec_get(ts, base) rte_timespec_get(ts, base)
+
+#endif /* RTE_TOOLCHAIN_GCC */
#endif /* _RTE_OS_SHIM_ */