[RTEMS Project] #4138: the atomicity of some operations cannot be guaranteed.

[RTEMS trac]

#4138: the atomicity of some operations cannot be guaranteed.
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  Reporter:  only_yipie  |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  normal      |  Milestone:  4.9.5
 Component:  tool/gcc    |    Version:  4.9
  Severity:  normal      |   Keywords:  gcc、atomicity.h
Blocked By:              |   Blocking:
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 The atomic operations _atmoic_add() and exchange_and_add() of the gcci386
 tool chain do not use the lock instruction, thus the atomicity of
 operations cannot be guaranteed.
 The related file is "gcc-4.9.3/libstdc++-v3/config/cpu/i386/atomicity.h".

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Ticket URL: <http://devel.rtems.org/ticket/4138>
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