/*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
- * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2011 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, version 2 only,
- * as published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0-only
*
- * 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
- * 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.,
- * 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>
#define ARRAY_SIZE(array) (sizeof(array) / (sizeof((array)[0])))
#endif
-#ifndef max
-#define max(a, b) ((a) > (b) ? (a) : (b))
+#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_t
-#define max_t(type, a, b) ((type) max(a, b))
-#endif
-#ifndef min
-#define min(a, b) ((a) < (b) ? (a) : (b))
+/*
+ * The min and max macros are not needed in C++ (std::min and std::max are
+ * preferred) and they conflict with some C++ header file. Don't define them
+ * when compiling C++ source.
+ */
+#ifndef __cplusplus
+
+# ifndef max
+# define max(a, b) ((a) > (b) ? (a) : (b))
+# endif
+
+# ifndef min
+# define min(a, b) ((a) < (b) ? (a) : (b))
+# endif
+
+# ifndef max_t
+# define max_t(type, a, b) max((type) a, (type) b)
+# endif
+
+# ifndef min_t
+# define min_t(type, a, b) min((type) a, (type) b)
+# endif
+
#endif
#ifndef LTTNG_PACKED
#define LTTNG_PACKED __attribute__((__packed__))
#endif
-#ifndef LTTNG_HIDDEN
-#define LTTNG_HIDDEN __attribute__((visibility("hidden")))
+#ifndef LTTNG_NO_SANITIZE_ADDRESS
+#if defined(__clang__) || defined (__GNUC__)
+#define LTTNG_NO_SANITIZE_ADDRESS __attribute__((no_sanitize_address))
+#else
+#define LTTNG_NO_SANITIZE_ADDRESS
+#endif
#endif
+#define is_signed(type) (((type) -1) < (type) 1)
+
#define member_sizeof(type, field) sizeof(((type *) 0)->field)
+#define ASSERT_LOCKED(lock) LTTNG_ASSERT(pthread_mutex_trylock(&lock))
+
/*
* lttng_strncpy returns 0 on success, or nonzero on failure.
* It checks that the @src string fits into @dst_len before performing
static inline
int lttng_strncpy(char *dst, const char *src, size_t dst_len)
{
- if (lttng_strnlen(src, dst_len) == dst_len) {
+ if (lttng_strnlen(src, dst_len) >= dst_len) {
/* Fail since copying would result in truncation. */
return -1;
}
- strncpy(dst, src, dst_len);
- /*
- * Be extra careful and put final \0 at the end after strncpy(),
- * even though we checked the length before. This makes Coverity
- * happy.
- */
- dst[dst_len - 1] = '\0';
+ strcpy(dst, src);
return 0;
}
+#ifdef NDEBUG
+/*
+* Force usage of the assertion condition to prevent unused variable warnings
+* when `assert()` are disabled by the `NDEBUG` definition.
+*/
+# define LTTNG_ASSERT(_cond) ((void) sizeof((void) (_cond), 0))
+#else
+# include <assert.h>
+# define LTTNG_ASSERT(_cond) assert(_cond)
+#endif
+
#endif /* _MACROS_H */