[Bug libstdc++/36801] config/cpu/generic/atomicity_mutex/atomicity.h incorrectly relies on global constructor ordering

[jifl-bugzilla at jifvik dot org]

------- Comment #5 from jifl-bugzilla at jifvik dot org  2008-07-15 01:19 -------
Created an attachment (id=15909)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15909&action=view)
Patch against 4.3.1 using a once variable to ensure safe initialisation

Here's a patch, let me know what you think. As a bonus, I've added a fix for a
thinko in concurrence.h with initialising a condition variable.

2008-07-14  Jonathan Larmour  <jifl@eCosCentric.com>

        PR libstdc++/36801
        * include/ext/concurrence.h: Separate out __mutex construction into
        a separate public method.
        Fix __gthread_cond_t initialisation function macro name.
        * config/cpu/generic/atomicity_mutex/atomicity.h: In a threaded
        environment, use a once variable to guarantee atomic_mutex is
        initialised before use.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36801