Add VZVirtualMachineConfiguration:SocketDevices

Since only a single VZVirtioSocketDevice is allowed per virtual machine
instance, it's useful to be able to check whether one is already set or
not in the VZVirtualMachineConfiguration object.

configuration.go

@@ -133,6 +133,22 @@ func (v *VirtualMachineConfiguration) SetSocketDevicesVirtualMachineConfiguratio
 	C.setSocketDevicesVZVirtualMachineConfiguration(v.Ptr(), array.Ptr())
 }
 
+// SocketDevices return the list of socket device configuration configured in this virtual machine configuration.
+// Return an empty array if no socket device configuration is set.
+func (v *VirtualMachineConfiguration) SocketDevices() []SocketDeviceConfiguration {
+	nsArray := &NSArray{
+		pointer: pointer{
+			ptr: C.VZVirtualMachineConfiguration_socketDevices(v.Ptr()),
+		},
+	}
+	ptrs := nsArray.ToPointerSlice()
+	socketDevices := make([]SocketDeviceConfiguration, len(ptrs))
+	for i, ptr := range ptrs {
+		socketDevices[i] = newVirtioSocketDeviceConfiguration(ptr)
+	}
+	return socketDevices
+}
+
 // SetStorageDevicesVirtualMachineConfiguration sets list of disk devices. Empty by default.
 func (v *VirtualMachineConfiguration) SetStorageDevicesVirtualMachineConfiguration(cs []StorageDeviceConfiguration) {
 	ptrs := make([]NSObject, len(cs))

socket.go

@@ -50,17 +50,22 @@ func NewVirtioSocketDeviceConfiguration() (*VirtioSocketDeviceConfiguration, err
 		return nil, ErrUnsupportedOSVersion
 	}
 
-	config := &VirtioSocketDeviceConfiguration{
-		pointer: pointer{
-			ptr: C.newVZVirtioSocketDeviceConfiguration(),
-		},
-	}
+	config := newVirtioSocketDeviceConfiguration(C.newVZVirtioSocketDeviceConfiguration())
+
 	runtime.SetFinalizer(config, func(self *VirtioSocketDeviceConfiguration) {
 		self.Release()
 	})
 	return config, nil
 }
 
+func newVirtioSocketDeviceConfiguration(ptr unsafe.Pointer) *VirtioSocketDeviceConfiguration {
+	return &VirtioSocketDeviceConfiguration{
+		pointer: pointer{
+			ptr: ptr,
+		},
+	}
+}
+
 // VirtioSocketDevice a device that manages port-based connections between the guest system and the host computer.
 //
 // Don’t create a VirtioSocketDevice struct directly. Instead, when you request a socket device in your configuration,

virtualization.h

@@ -48,6 +48,7 @@ void setSerialPortsVZVirtualMachineConfiguration(void *config,
     void *serialPorts);
 void setSocketDevicesVZVirtualMachineConfiguration(void *config,
     void *socketDevices);
+void *VZVirtualMachineConfiguration_socketDevices(void *config);
 void setStorageDevicesVZVirtualMachineConfiguration(void *config,
     void *storageDevices);
 void setDirectorySharingDevicesVZVirtualMachineConfiguration(void *config, void *directorySharingDevices);

virtualization.m

@@ -273,6 +273,18 @@ void setSocketDevicesVZVirtualMachineConfiguration(void *config,
     RAISE_UNSUPPORTED_MACOS_EXCEPTION();
 }
 
+/*!
+ @abstract Return the list of socket devices configurations for this VZVirtualMachineConfiguration. Return an empty array if no socket device configuration is set.
+ */
+void *VZVirtualMachineConfiguration_socketDevices(void *config)
+{
+    if (@available(macOS 11, *)) {
+        return [(VZVirtualMachineConfiguration *)config socketDevices]; // NSArray<VZSocketDeviceConfiguration *>
+    }
+
+    RAISE_UNSUPPORTED_MACOS_EXCEPTION();
+}
+
 /*!
  @abstract List of disk devices. Empty by default.
  @see VZVirtioBlockDeviceConfiguration