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Merge "init: add warning that start is not synchronous" am: 06039e58d8

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am: 2b78f9c0a9

Change-Id: Ifbbfc587a926ec343e166018c2a0f9fa914ed591
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Tom Cherry 2017-04-19 18:20:22 +00:00 committed by android-build-merger
commit 0a4ff0fb31
1 changed files with 12 additions and 1 deletions
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13
init/README.md
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@ -276,7 +276,8 @@ Commands
`class_start <serviceclass>`
> Start all services of the specified class if they are
not already running.
not already running. See the start entry for more information on
starting services.
`class_stop <serviceclass>`
> Stop and disable all services of the specified class if they are
@ -401,6 +402,16 @@ Commands
`start <service>`
> Start a service running if it is not already running.
Note that this is _not_ synchronous, and even if it were, there is
no guarantee that the operating system's scheduler will execute the
service sufficiently to guarantee anything about the service's status.
> This creates an important consequence that if the service offers
functionality to other services, such as providing a
communication channel, simply starting this service before those
services is _not_ sufficient to guarantee that the channel has
been set up before those services ask for it. There must be a
separate mechanism to make any such guarantees.
`stop <service>`
> Stop a service from running if it is currently running.