[Xen-devel] [PATCH v5 08/10] golang/xenlight: Implement Vcpuinfo and ListVcpu

[George Dunlap <george.dunlap@xxxxxxxxxx>]

From: Ronald Rojas <ronladred@xxxxxxxxx>

Include Golang version of libxl_vcpu_info
as VcpuInfo

Add a Golang call for libxl_list_vcpu as
ListVcpu

Signed-off-by: Ronald Rojas <ronladred@xxxxxxxxx>
Reviewed-by: George Dunlap <george.dunlap@xxxxxxxxxx>
---
CC: Ian Jackson <ian.jackson@xxxxxxxxxx>
CC: Wei Liu <wei.liu2@xxxxxxxxxx>

Changes from v4:
- Removed some unnecessary whitespace
---
 tools/golang/xenlight/xenlight.go | 52 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/tools/golang/xenlight/xenlight.go 
b/tools/golang/xenlight/xenlight.go
index f16185e..a8ade4f 100644
--- a/tools/golang/xenlight/xenlight.go
+++ b/tools/golang/xenlight/xenlight.go
@@ -783,3 +783,55 @@ func (Ctx *Context) ListDomain() (glist []Dominfo) {
 
        return
 }
+
+type Vcpuinfo struct {
+       Vcpuid     uint32
+       Cpu        uint32
+       Online     bool
+       Blocked    bool
+       Running    bool
+       VCpuTime   time.Duration
+       Cpumap     Bitmap
+       CpumapSoft Bitmap
+}
+
+func (cvci C.libxl_vcpuinfo) toGo() (gvci Vcpuinfo) {
+       gvci.Vcpuid = uint32(cvci.vcpuid)
+       gvci.Cpu = uint32(cvci.cpu)
+       gvci.Online = bool(cvci.online)
+       gvci.Blocked = bool(cvci.blocked)
+       gvci.Running = bool(cvci.running)
+       gvci.VCpuTime = time.Duration(cvci.vcpu_time)
+       gvci.Cpumap = cvci.cpumap.toGo()
+       gvci.CpumapSoft = cvci.cpumap_soft.toGo()
+
+       return
+}
+
+//libxl_vcpuinfo *libxl_list_vcpu(libxl_ctx *ctx, uint32_t domid,
+//                             int *nb_vcpu, int *nr_cpus_out);
+//void libxl_vcpuinfo_list_free(libxl_vcpuinfo *, int nr_vcpus);
+func (Ctx *Context) ListVcpu(id Domid) (glist []Vcpuinfo) {
+       err := Ctx.CheckOpen()
+       if err != nil {
+               return
+       }
+
+       var nbVcpu C.int
+       var nrCpu C.int
+
+       clist := C.libxl_list_vcpu(Ctx.ctx, C.uint32_t(id), &nbVcpu, &nrCpu)
+       defer C.libxl_vcpuinfo_list_free(clist, nbVcpu)
+
+       if int(nbVcpu) == 0 {
+               return
+       }
+
+       gslice := (*[1 << 
30]C.libxl_vcpuinfo)(unsafe.Pointer(clist))[:nbVcpu:nbVcpu]
+       for i := range gslice {
+               info := gslice[i].toGo()
+               glist = append(glist, info)
+       }
+
+       return
+}
-- 
2.1.4


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