Cygwin: Introduce new LTTNG_UST_STREAM_PIPE command to open wakeup pipe

[lttng-ust.git] / liblttng-ust-ctl / ustctl.c

diff --git a/liblttng-ust-ctl/ustctl.c b/liblttng-ust-ctl/ustctl.c
index 5069fbb19ce9638de182540c8c4a235ed61171d9..c9e930d045916b82eb7234ca80c07532aab0126e 100644 (file)
--- a/liblttng-ust-ctl/ustctl.c
+++ b/liblttng-ust-ctl/ustctl.c
@@ -237,6 +237,36 @@ error:
        return -EINVAL;
 }
 
+int ustctl_open_wait_pipe(int sock,
+                         struct lttng_ust_object_data *channel_data)
+{
+       struct ustcomm_ust_msg lum;
+       struct ustcomm_ust_reply lur;
+       int ret;
+
+       if (!channel_data)
+               return -EINVAL;
+
+       /* Create metadata channel */
+       memset(&lum, 0, sizeof(lum));
+       lum.handle = channel_data->handle;
+       lum.cmd = LTTNG_UST_STREAM_PIPE;
+       ret = ustcomm_send_app_cmd(sock, &lum, &lur);
+
+       if (ret) {
+               goto error;
+       }
+       if (lur.ret_code != USTCOMM_OK) {
+               ret = lur.ret_code;
+               goto error;
+       }
+
+       return 0;
+
+error:
+       return ret;
+}
+
 int ustctl_create_channel(int sock, int session_handle,
                struct lttng_ust_channel_attr *chops,
                struct lttng_ust_object_data **_channel_data)