libion: move ion.h into local include directory

Export it to users of libion with LOCAL_C_EXPORT_INCLUDE_DIRS

Change-Id: I4d00a9dd2e99953723994d0304ca77e0ad50a3a9
diff --git a/libion/Android.mk b/libion/Android.mk
index 5121fee..ae99ac5 100644
--- a/libion/Android.mk
+++ b/libion/Android.mk
@@ -5,11 +5,14 @@
 LOCAL_MODULE := libion
 LOCAL_MODULE_TAGS := optional
 LOCAL_SHARED_LIBRARIES := liblog
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
 include $(BUILD_SHARED_LIBRARY)
 
 include $(CLEAR_VARS)
 LOCAL_SRC_FILES := ion.c ion_test.c
 LOCAL_MODULE := iontest
 LOCAL_MODULE_TAGS := optional tests
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
 LOCAL_SHARED_LIBRARIES := liblog
 include $(BUILD_EXECUTABLE)
diff --git a/libion/include/ion/ion.h b/libion/include/ion/ion.h
new file mode 100644
index 0000000..0451b5a
--- /dev/null
+++ b/libion/include/ion/ion.h
@@ -0,0 +1,45 @@
+/*
+ *  ion.c
+ *
+ * Memory Allocator functions for ion
+ *
+ *   Copyright 2011 Google, Inc
+ *
+ *  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.
+ */
+
+#ifndef __SYS_CORE_ION_H
+#define __SYS_CORE_ION_H
+
+#include <linux/ion.h>
+
+__BEGIN_DECLS
+
+struct ion_handle;
+
+int ion_open();
+int ion_close(int fd);
+int ion_alloc(int fd, size_t len, size_t align, unsigned int heap_mask,
+	      unsigned int flags, ion_user_handle_t *handle);
+int ion_alloc_fd(int fd, size_t len, size_t align, unsigned int heap_mask,
+		 unsigned int flags, int *handle_fd);
+int ion_sync_fd(int fd, int handle_fd);
+int ion_free(int fd, ion_user_handle_t handle);
+int ion_map(int fd, ion_user_handle_t handle, size_t length, int prot,
+            int flags, off_t offset, unsigned char **ptr, int *map_fd);
+int ion_share(int fd, ion_user_handle_t handle, int *share_fd);
+int ion_import(int fd, int share_fd, ion_user_handle_t *handle);
+
+__END_DECLS
+
+#endif /* __SYS_CORE_ION_H */