document threads support

[imager.git] / imdatatypes.h

diff --git a/imdatatypes.h b/imdatatypes.h
index 32c92d14e78acbe810f1d01810074443a15c778b..af55f908d9907a5692c7a0c7bb98916c2957a559 100644 (file)
--- a/imdatatypes.h
+++ b/imdatatypes.h
@@ -553,6 +553,18 @@ typedef enum {
   ic_color
 } i_combine_t;
 
+/*
+=item i_mutex_t
+X<i_mutex>
+=category mutex
+=synopsis i_mutex_t mutex;
+
+Opaque type for Imager's mutex API.
+
+=cut
+ */
+typedef struct i_mutex_tag *i_mutex_t;
+
 /*
    describes an axis of a MM font.
    Modelled on FT2's FT_MM_Axis.