* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
* Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; only version 2 of the License.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2 only,
+ * as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307, USA.
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _MACROS_H
#define _MACROS_H
#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <common/compat/string.h>
/*
* Takes a pointer x and transform it so we can use it to access members
/*
* Memory allocation zeroed
*/
-#define zmalloc(x) calloc(1, x)
+static inline
+void *zmalloc(size_t len)
+{
+ return calloc(1, len);
+}
#ifndef ARRAY_SIZE
#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
+
+#ifndef max_t
+#define max_t(type, a, b) ((type) max(a, b))
+#endif
+
+#ifndef min
+#define min(a, b) ((a) < (b) ? (a) : (b))
+#endif
+
+#ifndef LTTNG_PACKED
+#define LTTNG_PACKED __attribute__((__packed__))
+#endif
+
+/*
+ * 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
+
+#define member_sizeof(type, field) sizeof(((type *) 0)->field)
+
+/*
+ * lttng_strncpy returns 0 on success, or nonzero on failure.
+ * It checks that the @src string fits into @dst_len before performing
+ * the copy. On failure, no copy has been performed.
+ *
+ * dst_len includes the string's trailing NULL.
+ */
+static inline
+int lttng_strncpy(char *dst, const char *src, size_t dst_len)
+{
+ if (lttng_strnlen(src, dst_len) >= dst_len) {
+ /* Fail since copying would result in truncation. */
+ return -1;
+ }
+ strcpy(dst, src);
+ return 0;
+}
+
#endif /* _MACROS_H */