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DiskDeviceAPI Protocols v2.0

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3371 a95241bf-73f2-0310-859d-f6bbb57e9c96
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Tyler Dauwalder 2003-05-28 21:39:56 +00:00
parent c48aa159a5
commit 4ca811957a
1 changed files with 36 additions and 0 deletions
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docs/develop/storage/DiskDeviceAPI_Protocols Normal file
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Disk Device Protocols
=====================
disk device job progress update message
target: Registered progress update BMessenger for the given job
message: B_DISK_DEVICE_JOB_UPDATE
"job_id": B_INT32_TYPE
"progress": B_UINT8_TYPE
[ "description": B_STRING_TYPE ]
reply: none (asynchronous message)
message fields:
- job_id: Unique job identifier
- progress: Percent of job completed (0 to 100)
- description: Optional description of current action being taken, i.e.
"allocating inodes", "writing superblock", etc.
-----------------------------------------------------------------------
disk device job finished message
target: Registered progress update BMessenger for the given job
message: B_DISK_DEVICE_JOB_FINISHED
"job_id": B_INT32_TYPE
reply: none (asynchronous message)
message fields:
- job_id: Unique job identifier
notes:
A separate job finished message is needed, as rounding error in
the computation of job progress may result in multiple
B_DISK_DEVICE_JOB_UPDATE messages with "progress" fields of 100.
-----------------------------------------------------------------------