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-rw-r--r--libguile/threads-plugin.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/libguile/threads-plugin.c b/libguile/threads-plugin.c
index e6671daf1..08bb3eee7 100644
--- a/libguile/threads-plugin.c
+++ b/libguile/threads-plugin.c
@@ -60,6 +60,11 @@ int (*scm_i_plugin_cond_timedwait) (scm_t_cond *,
scm_t_mutex *,
const struct timespec *);
+#ifdef SCM_DEBUG_THREADS
+#define FAST_MUTEX 1
+#define REC_MUTEX 2
+#endif
+
typedef struct rec_mutex {
#ifdef SCM_DEBUG_THREADS
int kind;