[Xen-devel] [PATCH v2 08/22] golang/xenlight: define MsVmGenid builtin type
From: Nick Rosbrook Define MsVmGenid as [int(C.LIBXL_MS_VM_GENID_LEN)]byte and implement fromC and toC functions. Signed-off-by: Nick Rosbrook Reviewed-by: George Dunlap --- tools/golang/xenlight/xenlight.go | 23 +++ 1 file changed, 23 insertions(+) diff --git a/tools/golang/xenlight/xenlight.go b/tools/golang/xenlight/xenlight.go index eb0d309543..108b50124a 100644 --- a/tools/golang/xenlight/xenlight.go +++ b/tools/golang/xenlight/xenlight.go @@ -216,6 +216,29 @@ func (mac Mac) toC() (C.libxl_mac, error) { return cmac, nil } +// MsVmGenid represents a libxl_ms_vm_genid. +type MsVmGenid [int(C.LIBXL_MS_VM_GENID_LEN)]byte + +func (mvg *MsVmGenid) fromC(cmvg *C.libxl_ms_vm_genid) error { + b := (*[int(C.LIBXL_MS_VM_GENID_LEN)]C.uint8_t)(unsafe.Pointer(&cmvg.bytes[0])) + + for i, v := range b { + mvg[i] = byte(v) + } + + return nil +} + +func (mvg *MsVmGenid) toC() (C.libxl_ms_vm_genid, error) { + var cmvg C.libxl_ms_vm_genid + + for i, v := range mvg { + cmvg.bytes[i] = C.uint8_t(v) + } + + return cmvg, nil +} + type Context struct { ctx*C.libxl_ctx logger *C.xentoollog_logger_stdiostream -- 2.19.1 ___ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
Re: [Xen-devel] [PATCH v2 08/22] golang/xenlight: define MsVmGenid builtin type
On 11/15/19 7:44 PM, Nick Rosbrook wrote: > From: Nick Rosbrook > > Define MsVmGenid as [int(C.LIBXL_MS_VM_GENID_LEN)]byte and implement fromC > and toC functions. > > Signed-off-by: Nick Rosbrook > Reviewed-by: George Dunlap > --- > tools/golang/xenlight/xenlight.go | 23 +++ > 1 file changed, 23 insertions(+) > > diff --git a/tools/golang/xenlight/xenlight.go > b/tools/golang/xenlight/xenlight.go > index eb0d309543..108b50124a 100644 > --- a/tools/golang/xenlight/xenlight.go > +++ b/tools/golang/xenlight/xenlight.go > @@ -216,6 +216,29 @@ func (mac Mac) toC() (C.libxl_mac, error) { > return cmac, nil > } > > +// MsVmGenid represents a libxl_ms_vm_genid. > +type MsVmGenid [int(C.LIBXL_MS_VM_GENID_LEN)]byte > + > +func (mvg *MsVmGenid) fromC(cmvg *C.libxl_ms_vm_genid) error { > + b := > (*[int(C.LIBXL_MS_VM_GENID_LEN)]C.uint8_t)(unsafe.Pointer(&cmvg.bytes[0])) > + > + for i, v := range b { > + mvg[i] = byte(v) > + } Sorry to come back to this -- is there a reason we can't just do something like this? func (u *Uuid) fromC(c *C.libxl_uuid) error { for i := range *u { u[i] = byte(c.uuid[i]) } return nil } I.e., the only reason we seem to be doing the cast is to have an appropriate type to range over; but we can just range over `*u` instead. -George ___ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel