X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Fmacros.h;h=874501ef1749325b38ba6d4214990da1396cd74a;hb=HEAD;hp=e9dc190aac3f00c0235d272d375c950632013a26;hpb=0d79f53ed591cb2e314d2db51c62f3900a956fa3;p=lttng-tools.git diff --git a/src/common/macros.h b/src/common/macros.h deleted file mode 100644 index e9dc190aa..000000000 --- a/src/common/macros.h +++ /dev/null @@ -1,146 +0,0 @@ -/* - * Copyright (C) 2011 David Goulet - * Copyright (C) 2011 Mathieu Desnoyers - * - * SPDX-License-Identifier: GPL-2.0-only - * - */ - -#ifndef _MACROS_H -#define _MACROS_H - -#include -#include -#include -#include - -/* - * Takes a pointer x and transform it so we can use it to access members - * without a function call. Here an example: - * - * #define GET_SIZE(x) LTTNG_REF(x)->size - * - * struct { int size; } s; - * - * printf("size : %d\n", GET_SIZE(&s)); - * - * For this example we can't use something like this for compatibility purpose - * since this will fail: - * - * #define GET_SIZE(x) x->size; - * - * This is mostly use for the compatibility layer of lttng-tools. See - * poll/epoll for a good example. Since x can be on the stack or allocated - * memory using malloc(), we must use generic accessors for compat in order to - * *not* use a function to access members and not the variable name. - */ -#define LTTNG_REF(x) ((typeof(*x) *)(x)) - -/* - * Memory allocation zeroed - */ -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 - - -/* - * 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_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) - -/* - * 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)) - -#define member_sizeof(type, field) sizeof(((type *) 0)->field) - -#define ASSERT_LOCKED(lock) LTTNG_ASSERT(pthread_mutex_trylock(&lock)) - -/* - * Get an aligned pointer to a value. This is meant - * as a helper to pass an aligned pointer to a member in a packed structure - * to a function. - */ -#define ALIGNED_CONST_PTR(value) (((const typeof(value) []) { value })) - -/* - * 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; -} - -#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 -# define LTTNG_ASSERT(_cond) assert(_cond) -#endif - -#endif /* _MACROS_H */