#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
#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
#define min(a, b) ((a) < (b) ? (a) : (b))
#endif
+#ifndef min_t
+#define min_t(type, a, b) ((type) min(a, b))
+#endif
+
#ifndef LTTNG_PACKED
#define LTTNG_PACKED __attribute__((__packed__))
#endif
-#ifndef LTTNG_HIDDEN
+/*
+ * Align value to the next multiple of align. Returns val if it already is a
+ * multiple of align. Align must be a power of two.
+ */
+#define ALIGN_TO(value, align) ((value + (align - 1)) & ~(align - 1))
+
+/*
+ * 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
static inline
int lttng_strncpy(char *dst, const char *src, size_t dst_len)
{
- if (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;
}