1 files changed, 95 insertions, 0 deletions
diff --git a/runtimes/nn/depend/libcutils/native_handle.c b/runtimes/nn/depend/libcutils/native_handle.c
new file mode 100644
index 000000000..95bbc41c4
--- /dev/null
+++ b/runtimes/nn/depend/libcutils/native_handle.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#include <cutils/native_handle.h>
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+static const int kMaxNativeFds = 1024;
+static const int kMaxNativeInts = 1024;
+
+native_handle_t* native_handle_init(char* storage, int numFds, int numInts) {
+    if ((uintptr_t) storage % alignof(native_handle_t)) {
+        errno = EINVAL;
+        return NULL;
+    }
+
+    native_handle_t* handle = (native_handle_t*) storage;
+    handle->version = sizeof(native_handle_t);
+    handle->numFds = numFds;
+    handle->numInts = numInts;
+    return handle;
+}
+
+native_handle_t* native_handle_create(int numFds, int numInts) {
+    if (numFds < 0 || numInts < 0 || numFds > kMaxNativeFds || numInts > kMaxNativeInts) {
+        errno = EINVAL;
+        return NULL;
+    }
+
+    size_t mallocSize = sizeof(native_handle_t) + (sizeof(int) * (numFds + numInts));
+    native_handle_t* h = malloc(mallocSize);
+    if (h) {
+        h->version = sizeof(native_handle_t);
+        h->numFds = numFds;
+        h->numInts = numInts;
+    }
+    return h;
+}
+
+native_handle_t* native_handle_clone(const native_handle_t* handle) {
+    native_handle_t* clone = native_handle_create(handle->numFds, handle->numInts);
+    if (clone == NULL) return NULL;
+
+    for (int i = 0; i < handle->numFds; i++) {
+        clone->data[i] = dup(handle->data[i]);
+        if (clone->data[i] == -1) {
+            clone->numFds = i;
+            native_handle_close(clone);
+            native_handle_delete(clone);
+            return NULL;
+        }
+    }
+
+    memcpy(&clone->data[handle->numFds], &handle->data[handle->numFds],
+           sizeof(int) * handle->numInts);
+
+    return clone;
+}
+
+int native_handle_delete(native_handle_t* h) {
+    if (h) {
+        if (h->version != sizeof(native_handle_t)) return -EINVAL;
+        free(h);
+    }
+    return 0;
+}
+
+int native_handle_close(const native_handle_t* h) {
+    if (h->version != sizeof(native_handle_t)) return -EINVAL;
+
+    int saved_errno = errno;
+    const int numFds = h->numFds;
+    for (int i = 0; i < numFds; ++i) {
+        close(h->data[i]);
+    }
+    errno = saved_errno;
+    return 0;
+}