-WARN_UNUSED_RESULT d0_iobuf_t *d0_iobuf_open_read(const void *buf, size_t len); // note: can read AND write!
-WARN_UNUSED_RESULT d0_iobuf_t *d0_iobuf_open_write(void *buf, size_t len); // note: can read AND write!
-WARN_UNUSED_RESULT BOOL d0_iobuf_conv_base64_in(d0_iobuf_t *buf);
-WARN_UNUSED_RESULT BOOL d0_iobuf_conv_base64_out(d0_iobuf_t *buf);
-BOOL d0_iobuf_close(d0_iobuf_t *buf, size_t *len); // don't warn
-WARN_UNUSED_RESULT size_t d0_iobuf_write_raw(d0_iobuf_t *buf, const void *s, size_t n);
-WARN_UNUSED_RESULT size_t d0_iobuf_read_raw(d0_iobuf_t *buf, void *s, size_t n);
-WARN_UNUSED_RESULT BOOL d0_iobuf_write_packet(d0_iobuf_t *buf, const void *s, size_t n);
-WARN_UNUSED_RESULT BOOL d0_iobuf_read_packet(d0_iobuf_t *buf, void *s, size_t *n);
+D0_WARN_UNUSED_RESULT d0_iobuf_t *d0_iobuf_open_read(const void *buf, size_t len); // note: can read AND write!
+D0_WARN_UNUSED_RESULT d0_iobuf_t *d0_iobuf_open_write(void *buf, size_t len); // note: can read AND write!
+D0_WARN_UNUSED_RESULT D0_BOOL d0_iobuf_conv_base64_in(d0_iobuf_t *buf);
+D0_WARN_UNUSED_RESULT D0_BOOL d0_iobuf_conv_base64_out(d0_iobuf_t *buf);
+D0_BOOL d0_iobuf_close(d0_iobuf_t *buf, size_t *len); // don't warn
+D0_WARN_UNUSED_RESULT size_t d0_iobuf_write_raw(d0_iobuf_t *buf, const void *s, size_t n);
+D0_WARN_UNUSED_RESULT size_t d0_iobuf_read_raw(d0_iobuf_t *buf, void *s, size_t n);
+D0_WARN_UNUSED_RESULT D0_BOOL d0_iobuf_write_packet(d0_iobuf_t *buf, const void *s, size_t n);
+D0_WARN_UNUSED_RESULT D0_BOOL d0_iobuf_read_packet(d0_iobuf_t *buf, void *s, size_t *n);