sim: dv-sockser: add stub funcs when not available

This lets ports assume that the dv-sockser API is always available if
they want to.  This way we don't have to do an abort at configure time
and it makes the resulting code a bit simpler.

1 files changed, 37 insertions, 0 deletions

diff --git a/sim/common/dv-sockser.h b/sim/common/dv-sockser.h
index cc4fd74..1fd1c12 100644
--- a/sim/common/dv-sockser.h
+++ b/sim/common/dv-sockser.h
@@ -19,11 +19,15 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 #ifndef DV_SOCKSER_H
 #define DV_SOCKSER_H
 
+#include "sim-inline.h"
+
 /* bits in result of dev_sockser_status */
 #define DV_SOCKSER_INPUT_EMPTY  0x1
 #define DV_SOCKSER_OUTPUT_EMPTY 0x2
 #define DV_SOCKSER_DISCONNECTED 0x4
 
+#ifdef HAVE_DV_SOCKSER
+
 /* FIXME: later add a device ptr arg */
 extern int dv_sockser_status (SIM_DESC);
 int dv_sockser_write (SIM_DESC, unsigned char);
@@ -32,4 +36,37 @@ int dv_sockser_read (SIM_DESC);
 
 SIM_RC dv_sockser_install (SIM_DESC);
 
+#else
+
+/* If dv-sockser isn't available, provide stub functions.  */
+
+STATIC_INLINE int
+dv_sockser_status (SIM_DESC sd)
+{
+  return (DV_SOCKSER_INPUT_EMPTY  |
+	  DV_SOCKSER_OUTPUT_EMPTY |
+	  DV_SOCKSER_DISCONNECTED);
+}
+
+STATIC_INLINE int
+dv_sockser_write (SIM_DESC sd, unsigned char c)
+{
+  return -1;
+}
+
+STATIC_INLINE int
+dv_sockser_write_buffer (SIM_DESC sd, const unsigned char *buffer,
+			 unsigned nr_bytes)
+{
+  return -1;
+}
+
+STATIC_INLINE int
+dv_sockser_read (SIM_DESC sd)
+{
+  return -1;
+}
+
+#endif /* HAVE_DV_SOCKSER */
+
 #endif /* DV_SOCKSER_H */