k0kubun	2018-08-02 22:03:34 +0900 (Thu, 02 Aug 2018)

  New Revision: 64160

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=64160

  Log:
    mjit.c: suppress warnings by -Wunused-value
    
    on MinGW with __atomic_exchange_n(). It returns the previous pointer value but
    obviously it's not needed in MJIT's usage.
    
    mjit.c: In function 'compact_all_jit_code':
    ruby_atomic.h:11:36: warning: value computed is not used [-Wunused-value]
     # define ATOMIC_EXCHANGE(var, val) __atomic_exchange_n(&(var), (val), __ATOMIC_SEQ_CST)
                                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Modified files:
    trunk/mjit.c
Index: mjit.c
===================================================================
--- mjit.c	(revision 64159)
+++ mjit.c	(revision 64160)
@@ -140,7 +140,7 @@ typedef intptr_t pid_t; https://github.com/ruby/ruby/blob/trunk/mjit.c#L140
 #endif
 
 /* Atomically set function pointer if possible. */
-#define MJIT_ATOMIC_SET(var, val) ATOMIC_PTR_EXCHANGE(var, val)
+#define MJIT_ATOMIC_SET(var, val) (void)ATOMIC_PTR_EXCHANGE(var, val)
 
 /* A copy of MJIT portion of MRI options since MJIT initialization.  We
    need them as MJIT threads still can work when the most MRI data were

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