Add basic dxcore bindings

This change copies dxcore.h and dxcore.c from libnvidia-container to
allow for the driver store path to be queried. Modifications are made
to dxcore to remove the code associated with checking the components
in the driver store path.

Signed-off-by: Evan Lezar <elezar@nvidia.com>

internal/dxcore/api.go

@@ -0,0 +1,58 @@
+/**
+# Copyright (c) NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+**/
+
+package dxcore
+
+import (
+	"github.com/NVIDIA/go-nvml/pkg/dl"
+)
+
+const (
+	libraryName      = "libdxcore.so"
+	libraryLoadFlags = dl.RTLD_LAZY | dl.RTLD_GLOBAL
+)
+
+// dxcore stores a reference the dxcore dynamic library
+var dxcore *context
+
+// Init initializes the dxcore dynamic library
+func Init() error {
+	c, err := initContext()
+	if err != nil {
+		return err
+	}
+	dxcore = c
+	return nil
+}
+
+// Shutdown closes the dxcore dynamic library
+func Shutdown() error {
+	if dxcore != nil && dxcore.initialized != 0 {
+		dxcore.deinitContext()
+	}
+	return nil
+}
+
+// GetDriverStorePaths returns the list of driver store paths
+func GetDriverStorePaths() []string {
+	var paths []string
+	for i := 0; i < dxcore.getAdapterCount(); i++ {
+		adapter := dxcore.getAdapter(i)
+		paths = append(paths, adapter.getDriverStorePath())
+	}
+
+	return paths
+}