vapi: implement vapi_wait() for reads

Type: improvement

The function vapi_wait() is intended to allow a caller to block while
waiting until the API queue can be read/written. It was a stub that
returned VAPI_ENOTSUP. Add code which implements the wait on being able
to read an incoming message.

Had to touch a few other things in vapi.h to make checkstyle.sh happy
after changing the prototype of vapi_wait().

Signed-off-by: Matthew Smith <mgsmith@netgate.com>
Change-Id: Ida80c1a1d34fe297ab23268087be65ea53ad7040

1 files changed, 5 insertions, 6 deletions

diff --git a/src/vpp-api/vapi/vapi.h b/src/vpp-api/vapi/vapi.h
index 46666293e4b..f4e060b0180 100644
--- a/src/vpp-api/vapi/vapi.h
+++ b/src/vpp-api/vapi/vapi.h
@@ -175,7 +175,7 @@ vapi_error_e vapi_send (vapi_ctx_t ctx, void *msg);
  *
  * @return VAPI_OK on success, other error code on error
  */
-  vapi_error_e vapi_send2 (vapi_ctx_t ctx, void *msg1, void *msg2);
+vapi_error_e vapi_send2 (vapi_ctx_t ctx, void *msg1, void *msg2);
 
 /**
  * @brief low-level api for reading messages from vpp
@@ -191,18 +191,17 @@ vapi_error_e vapi_send (vapi_ctx_t ctx, void *msg);
  *
  * @return VAPI_OK on success, other error code on error
  */
-  vapi_error_e vapi_recv (vapi_ctx_t ctx, void **msg, size_t * msg_size,
-			  svm_q_conditional_wait_t cond, u32 time);
+vapi_error_e vapi_recv (vapi_ctx_t ctx, void **msg, size_t *msg_size,
+			svm_q_conditional_wait_t cond, u32 time);
 
 /**
- * @brief wait for connection to become readable or writable
+ * @brief wait for connection to become readable
  *
  * @param ctx opaque vapi context
- * @param mode type of property to wait for - readability, writability or both
  *
  * @return VAPI_OK on success, other error code on error
  */
-  vapi_error_e vapi_wait (vapi_ctx_t ctx, vapi_wait_mode_e mode);
+vapi_error_e vapi_wait (vapi_ctx_t ctx);
 
 /**
  * @brief pick next message sent by vpp and call the appropriate callback