y2038: include: Move struct __timespec64 definition to a separate file

The struct __timespec64's definition has been moved from ./include/time.h to
./include/struct___timespec64.h.

This change would prevent from polluting other glibc namespaces (when
headers are modified to support 64 bit time on architectures with
__WORDSIZE==32).

Now it is possible to just include definition of this particular structure
when needed.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 27 insertions, 0 deletions

diff --git a/include/struct___timespec64.h b/include/struct___timespec64.h
new file mode 100644
index 0000000000..9abb25c8f7
--- /dev/null
+++ b/include/struct___timespec64.h
@@ -0,0 +1,27 @@
+#ifndef _STRUCT_TIMESPEC64_H
+#define _STRUCT_TIMESPEC64_H
+
+#if __TIMESIZE == 64
+# define __timespec64 timespec
+#else
+#include <endian.h>
+/* The glibc Y2038-proof struct __timespec64 structure for a time value.
+   To keep things Posix-ish, we keep the nanoseconds field a 32-bit
+   signed long, but since the Linux field is a 64-bit signed int, we
+   pad our tv_nsec with a 32-bit unnamed bit-field padding.
+
+   As a general rule the Linux kernel is ignoring upper 32 bits of
+   tv_nsec field.  */
+struct __timespec64
+{
+  __time64_t tv_sec;         /* Seconds */
+# if BYTE_ORDER == BIG_ENDIAN
+  __int32_t :32;             /* Padding */
+  __int32_t tv_nsec;         /* Nanoseconds */
+# else
+  __int32_t tv_nsec;         /* Nanoseconds */
+  __int32_t :32;             /* Padding */
+# endif
+};
+#endif
+#endif /* _STRUCT_TIMESPEC64_H  */