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check for GC_allow_register_threads

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This is not present in earlier versions of BDW-GC

* configure.ac: check for GC_allow_register_threads
* libguile/threads.c (scm_i_init_thread_for_guile): Only call
  GC_allow_register_threads if it is present.
This commit is contained in:
Michael Gran 2011-03-29 21:25:04 -07:00 • committed by Andy Wingo
parent 443f25dcff
commit 4000d0641f
2 changed files with 3 additions and 1 deletions
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2
configure.ac
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@ -1238,7 +1238,7 @@ save_LIBS="$LIBS"
LIBS="$BDW_GC_LIBS $LIBS" LIBS="$BDW_GC_LIBS $LIBS"
CFLAGS="$BDW_GC_CFLAGS $CFLAGS" CFLAGS="$BDW_GC_CFLAGS $CFLAGS"
AC_CHECK_FUNCS([GC_do_blocking GC_call_with_gc_active GC_pthread_exit GC_pthread_cancel]) AC_CHECK_FUNCS([GC_do_blocking GC_call_with_gc_active GC_pthread_exit GC_pthread_cancel GC_allow_register_threads])
# Though the `GC_do_blocking ()' symbol is present in GC 7.1, it is not # Though the `GC_do_blocking ()' symbol is present in GC 7.1, it is not
# declared, and has a different type (returning void instead of # declared, and has a different type (returning void instead of

2
libguile/threads.c
View file

@ -772,8 +772,10 @@ scm_i_init_thread_for_guile (struct GC_stack_base *base, SCM parent)
*/ */
scm_i_init_guile (base); scm_i_init_guile (base);
#ifdef HAVE_GC_ALLOW_REGISTER_THREADS
/* Allow other threads to come in later. */ /* Allow other threads to come in later. */
GC_allow_register_threads (); GC_allow_register_threads ();
#endif
scm_i_pthread_mutex_unlock (&scm_i_init_mutex); scm_i_pthread_mutex_unlock (&scm_i_init_mutex);
} }