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sleepd

Summary

Open webOS component to manage device suspend-resume cycles.

Description

Sleepd is one of the important daemons started when webOS boots. It is responsible for scheduling platform sleeps as soon as it is idle, so that we see optimum battery performance. To achieve this it keeps polling on the system to see if any of the other services or processes need the platform running, and if not it sends the suspend message to all these components (so that they can finish whatever they are doing ASAP and suspend). Sleepd then lets the kernel know that the platform is ready to sleep. Once an interrupt (such as key press) has woken the platform up, sleepd lets the entire system know that the platform is up and running so that all the activities can resume.

Sleepd also manages the RTC alarms on the system by maintaining a SQlite database for all the requested alarms.

How to Build on Linux

Dependencies

Below are the tools and libraries (and their minimum versions) required to build sleepd:

  • cmake (version required by openwebos/cmake-modules-webos)
  • gcc 4.6.3
  • glib-2.0 2.32.1
  • libxml2 2.7.2
  • make (any version)
  • openwebos/cjson 1.8.0
  • openwebos/cmake-modules-webos 1.0.0 RC4
  • openwebos/luna-service2 3.0.0
  • openwebos/nyx-lib 2.0.0
  • openwebos/powerd 4.0.0
  • pkg-config 0.26
  • sqlite3 3.6.20

Building

Once you have downloaded the source, enter the following to build it (after changing into the directory under which it was downloaded):

$ mkdir BUILD
$ cd BUILD
$ cmake ..
$ make
$ sudo make install

The directory under which the files are installed defaults to /usr/local/webos. You can install them elsewhere by supplying a value for WEBOS_INSTALL_ROOT when invoking cmake. For example:

$ cmake -D WEBOS_INSTALL_ROOT:PATH=$HOME/projects/openwebos ..
$ make
$ make install

will install the files in subdirectories of $HOME/projects/openwebos.

Specifying WEBOS_INSTALL_ROOT also causes pkg-config to look in that tree first before searching the standard locations. You can specify additional directories to be searched prior to this one by setting the PKG_CONFIG_PATH environment variable.

If not specified, WEBOS_INSTALL_ROOT defaults to /usr/local/webos.

To configure for a debug build, enter:

$ cmake -D CMAKE_BUILD_TYPE:STRING=Debug ..

To see a list of the make targets that cmake has generated, enter:

$ make help

Uninstalling

From the directory where you originally ran make install, enter:

$ [sudo] make uninstall

You will need to use sudo if you did not specify WEBOS_INSTALL_ROOT.

Copyright and License Information

Unless otherwise specified, all content, including all source code files and documentation files in this repository are:

Copyright (c) 2011-2013 LG Electronics, Inc.

Unless otherwise specified or set forth in the NOTICE file, all content, including all source code files and documentation files in this repository are: Licensed under the Apache License, Version 2.0 (the "License"); you may not use this content 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.