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-rw-r--r--libguile/atomics-internal.h26
1 files changed, 13 insertions, 13 deletions
diff --git a/libguile/atomics-internal.h b/libguile/atomics-internal.h
index 7acc37f88..e15ea3564 100644
--- a/libguile/atomics-internal.h
+++ b/libguile/atomics-internal.h
@@ -1,7 +1,7 @@
#ifndef SCM_ATOMICS_INTERNAL_H
#define SCM_ATOMICS_INTERNAL_H
-/* Copyright 2016,2018
+/* Copyright 2016,2018-2019
Free Software Foundation, Inc.
This file is part of Guile.
@@ -75,13 +75,14 @@ scm_atomic_swap_scm (SCM *loc, SCM val)
atomic_uintptr_t *a_loc = (atomic_uintptr_t *) loc;
return SCM_PACK (atomic_exchange (a_loc, SCM_UNPACK (val)));
}
-static inline _Bool
-scm_atomic_compare_and_swap_scm (SCM *loc, SCM *expected, SCM desired)
+static inline SCM
+scm_atomic_compare_and_swap_scm (SCM *loc, SCM expected, SCM desired)
{
atomic_uintptr_t *a_loc = (atomic_uintptr_t *) loc;
- return atomic_compare_exchange_weak (a_loc,
- (uintptr_t *) expected,
- SCM_UNPACK (desired));
+ SCM result = expected;
+ atomic_compare_exchange_strong (a_loc, (uintptr_t *) &result,
+ SCM_UNPACK (desired));
+ return result;
}
#else /* HAVE_STDATOMIC_H */
@@ -161,20 +162,19 @@ scm_atomic_swap_scm (SCM *loc, SCM val)
scm_i_pthread_mutex_unlock (&atomics_lock);
return ret;
}
-static inline int
-scm_atomic_compare_and_swap_scm (SCM *loc, SCM *expected, SCM desired)
+static inline SCM
+scm_atomic_compare_and_swap_scm (SCM *loc, SCM expected, SCM desired)
{
- int ret;
+ SCM ret;
scm_i_pthread_mutex_lock (&atomics_lock);
- if (*loc == *expected)
+ if (*loc == expected)
{
*loc = desired;
- ret = 1;
+ ret = expected;
}
else
{
- *expected = *loc;
- ret = 0;
+ ret = *loc;
}
scm_i_pthread_mutex_unlock (&atomics_lock);
return ret;