libsuspend: create new library to handle triggering suspend

libsuspend provides functions autosuspend_enable() and
autosuspend_disable() to trigger suspend on a variety of different
kernels.

Change-Id: I5dc28fb51532fa7c514330f1cfde7698d31d734c

1 files changed, 48 insertions, 0 deletions

diff --git a/libsuspend/include/suspend/autosuspend.h b/libsuspend/include/suspend/autosuspend.h
new file mode 100644
index 0000000..f56fc6a
--- /dev/null
+++ b/libsuspend/include/suspend/autosuspend.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+#ifndef _LIBSUSPEND_AUTOSUSPEND_H_
+#define _LIBSUSPEND_AUTOSUSPEND_H_
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+/*
+ * autosuspend_enable
+ *
+ * Turn on autosuspend in the kernel, allowing it to enter suspend if no
+ * wakelocks/wakeup_sources are held.
+ *
+ *
+ *
+ * Returns 0 on success, -1 if autosuspend was not enabled.
+ */
+int autosuspend_enable(void);
+
+/*
+ * autosuspend_disable
+ *
+ * Turn off autosuspend in the kernel, preventing suspend and synchronizing
+ * with any in-progress resume.
+ *
+ * Returns 0 on success, -1 if autosuspend was not disabled.
+ */
+int autosuspend_disable(void);
+
+__END_DECLS
+
+#endif