commit 3fca567ff438145e28dd1318ad5b1734c1091257
author Mohsin Kazmi <sykazmi@cisco.com> Thu Jan 04 18:57:26 2018 +0100
committer Dave Barach <openvpp@barachs.net> Mon Jan 22 18:17:23 2018 +0000
tree 7101b4ae130f2731e549f82ab98af8bfbabc6571
parent e82488f10f20f464961c5c7b381b4a419bca0bbc

svm: queue sub: Add conditional timed wait

On reviece side svm queue only permits blocking and
non-blocking calls. This patch adds timed wait blocking
functionality which returns either on signal/event or
on given time out.

It also preserves the original behavior, so it will not
hurt client applications which are using svm queue.

Change-Id: Ic10632170330a80afb8bc781d4ccddfe4da2c69a
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>

src/vpp-api/vapi/vapi.c

diff --git a/src/vpp-api/vapi/vapi.c b/src/vpp-api/vapi/vapi.c
index 7aa346b..754c89c 100644
--- a/src/vpp-api/vapi/vapi.c
+++ b/src/vpp-api/vapi/vapi.c
@@ -502,7 +502,8 @@
 }
 
 vapi_error_e
-vapi_recv (vapi_ctx_t ctx, void **msg, size_t * msg_size)
+vapi_recv (vapi_ctx_t ctx, void **msg, size_t * msg_size,
+	   svm_q_conditional_wait_t cond, u32 time)
 {
   if (!ctx || !ctx->connected || !msg || !msg_size)
     {
@@ -519,7 +520,9 @@
 
   svm_queue_t *q = am->vl_input_queue;
   VAPI_DBG ("doing shm queue sub");
-  int tmp = svm_queue_sub (q, (u8 *) & data, 0);
+
+  int tmp = svm_queue_sub (q, (u8 *) & data, cond, time);
+
   if (tmp == 0)
     {
 #if VAPI_DEBUG_ALLOC
@@ -700,7 +703,7 @@
   VAPI_DBG ("vapi_dispatch_one()");
   void *msg;
   size_t size;
-  vapi_error_e rv = vapi_recv (ctx, &msg, &size);
+  vapi_error_e rv = vapi_recv (ctx, &msg, &size, SVM_Q_WAIT, 0);
   if (VAPI_OK != rv)
     {
       VAPI_DBG ("vapi_recv failed with rv=%d", rv);