[asterisk-dev] [Code Review] Add a serializer interface to the threadpool

[David Lee]

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https://reviewboard.asterisk.org/r/2323/
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Review request for Asterisk Developers and Mark Michelson.


Summary
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This patch adds the ability to create a serializer from a thread pool. A
serializer is a ast_taskprocessor with the same contract as a default
taskprocessor (tasks execute serially) except instead of executing out
of a dedicated thread, execution occurs in a thread from a
ast_threadpool. Think of it as a lightweight thread.

While it guarantees that each task will complete before executing the
next, there is no guarantee as to which thread from the pool individual
tasks will execute. This normally only matters if your code relys on
thread specific information, such as thread locals.

This patch also fixes a bug in how the 'was_empty' parameter is computed
for the push callback.


Diffs
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  /trunk/include/asterisk/threadpool.h 381085 
  /trunk/main/taskprocessor.c 381085 
  /trunk/main/threadpool.c 381085 
  /trunk/tests/test_threadpool.c 381085 

Diff: https://reviewboard.asterisk.org/r/2323/diff


Testing
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Unit testing.


Thanks,

David

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