Re: [Xen-devel] [PATCH RFC 3/8] golang/xenlight: Add host-related functionality

[George Dunlap <george.dunlap@xxxxxxxxxx>]

On 23/01/17 16:43, Ronald Rojas wrote:
> Add calls for the following host-related functionality:
> - libxl_get_max_cpus
> - libxl_get_online_cpus
> - libxl_get_max_nodes
> - libxl_get_free_memory
> - libxl_get_physinfo
> - libxl_get_version_info
> 
> Include Golang versions of the following structs:
> - libxl_physinfo as Physinfo
> - libxl_version_info as VersionInfo
> - libxl_hwcap as Hwcap
> 
> Signed-off-by: Ronald Rojas <ronladred@xxxxxxxxx>

Mostly looks good!  One final comment:

[snip]
> +//int libxl_get_physinfo(libxl_ctx *ctx, libxl_physinfo *physinfo)
> +func (Ctx *Context) GetPhysinfo() (physinfo *Physinfo, err error) {
> +     err = Ctx.CheckOpen()
> +     if err != nil {
> +             return
> +     }
> +     var cphys C.libxl_physinfo
> +
> +     ret := C.libxl_get_physinfo(Ctx.ctx, &cphys)

So I actually forgot that you're actually supposed to always call
"libxl_<type>_init()" on IDL-generated types before using them, and
"libxl_<type>_dispose()" when you're done with them.  As it happens in
this case, the struct contains no pointers to sub-structs; but if that
changes in the future, this would leak the memory.

Everything else is good, thanks.

 -George

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