[Xen-devel] [PATCH 9/9] DO NOT APPLY: Sketch constructors, DomainCreateNew

[George Dunlap <george.dunlap@xxxxxxxxxx>]

This is a sketch of functionality suitable for creating a basic
domain, with a disk and a vif.  DomainConfig, DeviceDisk, and
DeviceNic types are all created using constructor functions, which
initialize them with libxl's defaults.

DomainCreateNew takes the config and calls without any updates.

Obviously some of these will need to be changed it we switch to
passing references to .toC() rather than passing back by value.

The main purpose of this is to allow testing of creating a hard-coded
domain.

Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxx>
---
CC: Nick Rosbrook <rosbrookn@xxxxxxxxxxxx>
---
 tools/golang/xenlight/xenlight.go | 66 +++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/tools/golang/xenlight/xenlight.go 
b/tools/golang/xenlight/xenlight.go
index f70a4c6d96..91da79bc68 100644
--- a/tools/golang/xenlight/xenlight.go
+++ b/tools/golang/xenlight/xenlight.go
@@ -1079,3 +1079,69 @@ func (Ctx *Context) PrimaryConsoleGetTty(domid uint32) 
(path string, err error)
        path = C.GoString(cpath)
        return
 }
+
+func NewDomainConfig(t DomainType) (*DomainConfig, error) {
+       var cconfig C.libxl_domain_config
+
+       C.libxl_domain_config_init(&cconfig)
+       C.libxl_domain_build_info_init_type(&cconfig.b_info, 
C.libxl_domain_type(t))
+
+       gconfig := &DomainConfig{}
+       err := gconfig.fromC(&cconfig)
+       if err != nil {
+               return nil, err
+       }
+
+       return gconfig, nil
+}
+
+func NewDeviceDisk() (*DeviceDisk, error) {
+       var ctype C.libxl_device_disk
+
+       C.libxl_device_disk_init(&ctype)
+
+       gtype := &DeviceDisk{}
+       err := gtype.fromC(&ctype)
+
+       if err != nil {
+               return nil, err
+       }
+
+       return gtype, nil
+}
+
+func NewDeviceNic() (*DeviceNic, error) {
+       var ctype C.libxl_device_nic
+
+       C.libxl_device_nic_init(&ctype)
+
+       gtype := &DeviceNic{}
+       err := gtype.fromC(&ctype)
+
+       if err != nil {
+               return nil, err
+       }
+
+       return gtype, nil
+}
+
+// int libxl_domain_create_new(libxl_ctx *ctx, libxl_domain_config *d_config,
+//                             uint32_t *domid,
+//                             const libxl_asyncop_how *ao_how,
+//                             const libxl_asyncprogress_how *aop_console_how)
+func (Ctx *Context) DomainCreateNew(config *DomainConfig) (Domid, error) {
+       var cdomid C.uint32_t
+       cconfig, err := config.toC()
+       if err != nil {
+               return Domid(0), fmt.Errorf("Converting domain config to C: 
%v", err)
+       }
+       defer C.libxl_domain_config_dispose(&cconfig)
+
+       fmt.Errorf("Calling libxl_domain_create_new")
+       ret := C.libxl_domain_create_new(Ctx.ctx, &cconfig, &cdomid, nil, nil)
+       if ret != 0 {
+               return Domid(0), Error(ret)
+       }
+
+       return Domid(cdomid), nil
+}
-- 
2.24.0


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