diff options
Diffstat (limited to 'src/syscall/syscall_darwin_386.go')
| -rw-r--r-- | src/syscall/syscall_darwin_386.go | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/src/syscall/syscall_darwin_386.go b/src/syscall/syscall_darwin_386.go index 2074e7ac2e..f75de000bd 100644 --- a/src/syscall/syscall_darwin_386.go +++ b/src/syscall/syscall_darwin_386.go @@ -26,14 +26,21 @@ func NsecToTimeval(nsec int64) (tv Timeval) { } //sysnb gettimeofday(tp *Timeval) (sec int32, usec int32, err error) -func Gettimeofday(tv *Timeval) (err error) { - // The tv passed to gettimeofday must be non-nil - // but is otherwise unused. The answers come back - // in the two registers. +func Gettimeofday(tv *Timeval) error { + // The tv passed to gettimeofday must be non-nil. + // Before macOS Sierra (10.12), tv was otherwise unused and + // the answers came back in the two registers. + // As of Sierra, gettimeofday return zeros and populates + // tv itself. sec, usec, err := gettimeofday(tv) - tv.Sec = int32(sec) - tv.Usec = int32(usec) - return err + if err != nil { + return err + } + if sec != 0 || usec != 0 { + tv.Sec = int32(sec) + tv.Usec = int32(usec) + } + return nil } func SetKevent(k *Kevent_t, fd, mode, flags int) { |