Misc fixes for vfu_ctx_try_attach() and vfu_realize_ctx() (#175)

Misc changes for vfu_ctx_try_attach()
* Rename to vfu_attach_ctx()
* Removed call to vfu_realize_ctx(), should be called separately
* Now vfu_attach_ctx() must also be called for blocking ctx.

Misc changes for vfu_realize_ctx()
* Made calling vfu_realize_ctx() mandatory
* vfu_ctx_drive() and vfu_poll_ctx() returns EINVAL if the device is not
realized.
* Renamed vfu_ctx->ready to vfu_ctx->realized

Added unit test for vfu_attach_ctx() and vfu_realize_ctx()

Signed-off-by: Swapnil Ingle <swapnil.ingle@nutanix.com>
Reviewed-by: Thanos Makatos <thanos.makatos@nutanix.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/samples/null.c b/samples/null.c
index fda260e..7944e30 100644
--- a/samples/null.c
+++ b/samples/null.c
@@ -62,6 +62,16 @@ static void* null_drive(void *arg)
         fprintf(stderr, "failed to enable cancel type: %s\n", strerror(ret));
         return NULL;
     }
+    ret = vfu_realize_ctx(vfu_ctx);
+    if (ret < 0) {
+        fprintf(stderr, "failed to realize device\n");
+        return NULL;
+    }
+    ret = vfu_attach_ctx(vfu_ctx);
+    if (ret < 0) {
+        fprintf(stderr, "failed to attach device\n");
+        return NULL;
+    }
     printf("starting device emulation\n");
     vfu_ctx_drive(vfu_ctx);
     return NULL;