Harmonize rw_prog_cxx_works macro across projects

[lttng-ust.git] / include / lttng / ust-abi.h

diff --git a/include/lttng/ust-abi.h b/include/lttng/ust-abi.h
index f76d2a9fa5c6b25c3d99b96a21314eb1ed86d227..01e9daf44a4dcf7f6915d3b20cc43a7b27ce2c8c 100644 (file)
--- a/include/lttng/ust-abi.h
+++ b/include/lttng/ust-abi.h
@@ -30,6 +30,10 @@
 #include <stdint.h>
 #include <lttng/ust-compiler.h>
 
+#ifndef LTTNG_PACKED
+#error "LTTNG_PACKED should be defined"
+#endif
+
 #ifndef __ust_stringify
 #define __ust_stringify1(x)    #x
 #define __ust_stringify(x)     __ust_stringify1(x)
@@ -177,7 +181,12 @@ struct lttng_ust_channel_attr {
        unsigned int switch_timer_interval;     /* usec */
        unsigned int read_timer_interval;       /* usec */
        enum lttng_ust_output output;           /* splice, mmap */
-       char padding[LTTNG_UST_CHANNEL_ATTR_PADDING];
+       union {
+               struct {
+                       int64_t blocking_timeout;       /* Blocking timeout (usec) */
+               } s;
+               char padding[LTTNG_UST_CHANNEL_ATTR_PADDING];
+       } u;
 } LTTNG_PACKED;
 
 #define LTTNG_UST_TRACEPOINT_ITER_PADDING      16