BIND 10 #2399: make Logger::getLoggerPtr() thread safe

[BIND 10 Development]

#2399: make Logger::getLoggerPtr() thread safe
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                   Reporter:         |                 Owner:
  jinmei                             |                Status:  new
                       Type:         |             Milestone:  Next-Sprint-
  defect                             |  Proposed
                   Priority:         |            Resolution:
  medium                             |             Sensitive:  0
                  Component:         |           Sub-Project:  DNS
  logging                            |  Estimated Difficulty:  0
                   Keywords:         |           Total Hours:  0
            Defect Severity:  N/A    |
Feature Depending on Ticket:         |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by vorner):

 And how do you initialize the mutex without the static initialization
 fiasco in
 a thread-safe manner?

 One way to solve the problem could be to make sure the logging is
 initialized
 before we start the thread.

 Or is it so that there are many Logger objects, each of them having this
 problem? Then we probably would have to do it the combined way ‒ have
 single
 global mutex and make sure it is initialized in the non-threaded startup
 of
 application dynamically.

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Ticket URL: <http://bind10.isc.org/ticket/2399#comment:1>
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