feat(ze): add event support & vadd demo & refactor (#5)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

ze/event.go

@@ -0,0 +1,60 @@
+package ze
+
+import (
+	"runtime"
+	"unsafe"
+
+	"github.com/fumiama/gozel/gozel"
+)
+
+// EventPoolHandle (ze_event_pool_handle_t) Handle of driver's event pool object
+type EventPoolHandle gozel.ZeEventPoolHandle
+
+// EventPoolCreate Creates a pool of events on the context.
+func (h ContextHandle) EventPoolCreate(
+	evcount uint32, devices ...DeviceHandle,
+) (eph EventPoolHandle, err error) {
+	_, err = gozel.ZeEventPoolCreate(gozel.ZeContextHandle(h), &gozel.ZeEventPoolDesc{
+		Stype: gozel.ZE_STRUCTURE_TYPE_EVENT_POOL_DESC,
+		Flags: gozel.ZE_EVENT_POOL_FLAG_HOST_VISIBLE,
+		Count: evcount,
+	}, uint32(len(devices)), (*gozel.ZeDeviceHandle)(unsafe.SliceData(devices)),
+		(*gozel.ZeEventPoolHandle)(&eph),
+	)
+	runtime.KeepAlive(devices)
+	return
+}
+
+// Destroy Deletes an event pool object.
+func (h EventPoolHandle) Destroy() error {
+	_, err := gozel.ZeEventPoolDestroy(gozel.ZeEventPoolHandle(h))
+	return err
+}
+
+// EventHandle (ze_event_handle_t) Handle of driver's event object
+type EventHandle gozel.ZeEventHandle
+
+// EventCreate Creates an event from the pool.
+func (h EventPoolHandle) EventCreate(
+	index uint32, signal, wait gozel.ZeEventScopeFlags,
+) (eh EventHandle, err error) {
+	_, err = gozel.ZeEventCreate(gozel.ZeEventPoolHandle(h), &gozel.ZeEventDesc{
+		Stype:  gozel.ZE_STRUCTURE_TYPE_EVENT_DESC,
+		Index:  index,
+		Signal: signal,
+		Wait:   wait,
+	}, (*gozel.ZeEventHandle)(&eh))
+	return
+}
+
+// HostSynchronize The current host thread waits on an event to be signaled.
+func (h EventHandle) HostSynchronize(timeout uint64) error {
+	_, err := gozel.ZeEventHostSynchronize(gozel.ZeEventHandle(h), timeout)
+	return err
+}
+
+// Destroy Deletes an event object.
+func (h EventHandle) Destroy() error {
+	_, err := gozel.ZeEventDestroy(gozel.ZeEventHandle(h))
+	return err
+}