X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Fmacros.h;h=7eaf27cdf3787cbf02d5c4fc2bc48eb43632b734;hb=97056403bdb7c18abe9c1e8e0824e3a64123c4c2;hp=8ae6535d0de57ed1878bf42b98d37163fadccb49;hpb=f8f3885cc52af9d3c951da78989d6f4a25270411;p=lttng-tools.git

diff --git a/src/common/macros.h b/src/common/macros.h
index 8ae6535d0..7eaf27cdf 100644
--- a/src/common/macros.h
+++ b/src/common/macros.h
@@ -20,6 +20,7 @@
 #define _MACROS_H
 
 #include <stdlib.h>
+#include <stddef.h>
 #include <string.h>
 #include <common/compat/string.h>
 
@@ -58,6 +59,14 @@ void *zmalloc(size_t len)
 #define ARRAY_SIZE(array)   (sizeof(array) / (sizeof((array)[0])))
 #endif
 
+#ifndef container_of
+#define container_of(ptr, type, member)					\
+	({								\
+		const typeof(((type *)NULL)->member) * __ptr = (ptr);	\
+		(type *)((char *)__ptr - offsetof(type, member));	\
+	})
+#endif
+
 #ifndef max
 #define max(a, b) ((a) > (b) ? (a) : (b))
 #endif
@@ -74,7 +83,14 @@ void *zmalloc(size_t len)
 #define LTTNG_PACKED __attribute__((__packed__))
 #endif
 
-#ifndef LTTNG_HIDDEN
+/*
+ * LTTNG_HIDDEN: set the hidden attribute for internal functions
+ * On Windows, symbols are local unless explicitly exported,
+ * see https://gcc.gnu.org/wiki/Visibility
+ */
+#if defined(_WIN32) || defined(__CYGWIN__)
+#define LTTNG_HIDDEN
+#else
 #define LTTNG_HIDDEN __attribute__((visibility("hidden")))
 #endif