Add native_handle_clone
libhwbinder's Parcel::readNativeHandleNoDup returns a temporary
native_handle_t. We want a way to save the temporary handle for later
use.
Change-Id: I16f32043aa8b7d2c0aa57d67551500259b411410
diff --git a/include/cutils/native_handle.h b/include/cutils/native_handle.h
index 268c5d3..ae9135d 100644
--- a/include/cutils/native_handle.h
+++ b/include/cutils/native_handle.h
@@ -50,6 +50,15 @@
native_handle_t* native_handle_create(int numFds, int numInts);
/*
+ * native_handle_clone
+ *
+ * creates a native_handle_t and initializes it from another native_handle_t.
+ * Must be destroyed with native_handle_delete().
+ *
+ */
+native_handle_t* native_handle_clone(const native_handle_t* handle);
+
+/*
* native_handle_delete
*
* frees a native_handle_t allocated with native_handle_create().
diff --git a/libcutils/native_handle.c b/libcutils/native_handle.c
index 61fa38e..4290768 100644
--- a/libcutils/native_handle.c
+++ b/libcutils/native_handle.c
@@ -44,6 +44,27 @@
return h;
}
+native_handle_t* native_handle_clone(const native_handle_t* handle)
+{
+ native_handle_t* clone = native_handle_create(handle->numFds, handle->numInts);
+ int i;
+
+ for (i = 0; i < handle->numFds; i++) {
+ clone->data[i] = dup(handle->data[i]);
+ if (clone->data[i] < 0) {
+ 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) {