exp/sensor: reorg package to create space for darwin/arm,arm64 impl

Change-Id: I41e4088a92fff2f411dd82102fc3c421d2679c21
Reviewed-on: https://go-review.googlesource.com/13582
Reviewed-by: David Crawshaw <crawshaw@golang.org>

exp/sensor/android.c

@@ -2,12 +2,14 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build android
+
 #include <stdlib.h>
 #include <jni.h>
 
 #include <android/sensor.h>
 
-#include "sensors_android.h"
+#include "android.h"
 
 void android_createManager(int looperId, android_SensorManager* dst) {
   ASensorManager* manager = ASensorManager_getInstance();

exp/sensor/android.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build android
+
 package sensor
 
 /*
@@ -10,7 +12,7 @@ package sensor
 #include <stdlib.h>
 #include <android/sensor.h>
 
-#include "sensors_android.h"
+#include "android.h"
 */
 import "C"
 import (

exp/sensor/android.h

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build android
+
 #ifndef SENSORS_ANDROID_H
 #define SENSORS_ANDROID_H
 

exp/sensor/darwin_armx.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !android
+// +build darwin
+// +build arm arm64
 
 package sensor
 

exp/sensor/notmobile.go

@@ -0,0 +1,34 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux,!android darwin,!arm,!arm64
+
+package sensor
+
+import (
+	"errors"
+	"time"
+)
+
+type manager struct {
+}
+
+func (m *manager) initialize() {
+}
+
+func (m *manager) enable(t Type, delay time.Duration) error {
+	return errors.New("sensor: no sensors available")
+}
+
+func (m *manager) disable(t Type) error {
+	return errors.New("sensor: no sensors available")
+}
+
+func (m *manager) read(e []Event) (n int, err error) {
+	return 0, errors.New("sensor: no sensor data available")
+}
+
+func (m *manager) close() error {
+	return nil
+}