194 lines
5.3 KiB
C
194 lines
5.3 KiB
C
/*
|
|
* Copyright (c) 2011-2014, Wind River Systems, Inc.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* @brief Misc utilities
|
|
*
|
|
* Misc utilities usable by the kernel and application code.
|
|
*/
|
|
|
|
#ifndef _BLE_MESH_UTIL_H_
|
|
#define _BLE_MESH_UTIL_H_
|
|
|
|
#include <stddef.h>
|
|
#include "soc/soc.h"
|
|
#include "mesh_types.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* Helper to pass a int as a pointer or vice-versa.
|
|
* Those are available for 32 bits architectures:
|
|
*/
|
|
#ifndef POINTER_TO_UINT
|
|
#define POINTER_TO_UINT(x) ((u32_t) (x))
|
|
#endif
|
|
#ifndef UINT_TO_POINTER
|
|
#define UINT_TO_POINTER(x) ((void *) (x))
|
|
#endif
|
|
#ifndef POINTER_TO_INT
|
|
#define POINTER_TO_INT(x) ((s32_t) (x))
|
|
#endif
|
|
#ifndef INT_TO_POINTER
|
|
#define INT_TO_POINTER(x) ((void *) (x))
|
|
#endif
|
|
|
|
/* Evaluates to 0 if cond is true-ish; compile error otherwise */
|
|
#ifndef ZERO_OR_COMPILE_ERROR
|
|
#define ZERO_OR_COMPILE_ERROR(cond) ((int) sizeof(char[1 - 2 * !(cond)]) - 1)
|
|
#endif
|
|
|
|
/* Evaluates to 0 if array is an array; compile error if not array (e.g.
|
|
* pointer)
|
|
*/
|
|
#ifndef IS_ARRAY
|
|
#define IS_ARRAY(array) \
|
|
ZERO_OR_COMPILE_ERROR( \
|
|
!__builtin_types_compatible_p(__typeof__(array), \
|
|
__typeof__(&(array)[0])))
|
|
#endif
|
|
|
|
/* Evaluates to number of elements in an array; compile error if not
|
|
* an array (e.g. pointer)
|
|
*/
|
|
#ifndef ARRAY_SIZE
|
|
#define ARRAY_SIZE(array) \
|
|
((unsigned long) (IS_ARRAY(array) + \
|
|
(sizeof(array) / sizeof((array)[0]))))
|
|
#endif
|
|
|
|
/* Evaluates to 1 if ptr is part of array, 0 otherwise; compile error if
|
|
* "array" argument is not an array (e.g. "ptr" and "array" mixed up)
|
|
*/
|
|
#ifndef PART_OF_ARRAY
|
|
#define PART_OF_ARRAY(array, ptr) \
|
|
((ptr) && ((ptr) >= &array[0] && (ptr) < &array[ARRAY_SIZE(array)]))
|
|
#endif
|
|
|
|
#ifndef CONTAINER_OF
|
|
#define CONTAINER_OF(ptr, type, field) \
|
|
((type *)(((char *)(ptr)) - offsetof(type, field)))
|
|
#endif
|
|
|
|
/* round "x" up/down to next multiple of "align" (which must be a power of 2) */
|
|
#ifndef ROUND_UP
|
|
#define ROUND_UP(x, align) \
|
|
(((unsigned long)(x) + ((unsigned long)align - 1)) & \
|
|
~((unsigned long)align - 1))
|
|
#endif
|
|
|
|
#ifndef ROUND_DOWN
|
|
#define ROUND_DOWN(x, align) ((unsigned long)(x) & ~((unsigned long)align - 1))
|
|
#endif
|
|
|
|
/* round up/down to the next word boundary */
|
|
#ifndef WB_UP
|
|
#define WB_UP(x) ROUND_UP(x, sizeof(void *))
|
|
#endif
|
|
|
|
#ifndef WB_DN
|
|
#define WB_DN(x) ROUND_DOWN(x, sizeof(void *))
|
|
#endif
|
|
|
|
#ifndef ceiling_fraction
|
|
#define ceiling_fraction(numerator, divider) \
|
|
(((numerator) + ((divider) - 1)) / (divider))
|
|
#endif
|
|
|
|
#ifndef CHECKIF
|
|
#define CHECKIF(expr) if (expr)
|
|
#endif
|
|
|
|
/** @brief Return larger value of two provided expressions.
|
|
*
|
|
* @note Arguments are evaluated twice. See Z_MAX for GCC only, single
|
|
* evaluation version.
|
|
*/
|
|
#ifndef MAX
|
|
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
|
|
#endif
|
|
|
|
/** @brief Return smaller value of two provided expressions.
|
|
*
|
|
* @note Arguments are evaluated twice. See Z_MIN for GCC only, single
|
|
* evaluation version.
|
|
*/
|
|
#ifndef MIN
|
|
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
|
|
#endif
|
|
|
|
#ifndef BIT
|
|
#define BIT(n) (1UL << (n))
|
|
#endif
|
|
|
|
#ifndef BIT_MASK
|
|
#define BIT_MASK(n) (BIT(n) - 1)
|
|
#endif
|
|
|
|
/**
|
|
* @brief Check for macro definition in compiler-visible expressions
|
|
*
|
|
* This trick was pioneered in Linux as the config_enabled() macro.
|
|
* The madness has the effect of taking a macro value that may be
|
|
* defined to "1" (e.g. CONFIG_MYFEATURE), or may not be defined at
|
|
* all and turning it into a literal expression that can be used at
|
|
* "runtime". That is, it works similarly to
|
|
* "defined(CONFIG_MYFEATURE)" does except that it is an expansion
|
|
* that can exist in a standard expression and be seen by the compiler
|
|
* and optimizer. Thus much ifdef usage can be replaced with cleaner
|
|
* expressions like:
|
|
*
|
|
* if (IS_ENABLED(CONFIG_MYFEATURE))
|
|
* myfeature_enable();
|
|
*
|
|
* INTERNAL
|
|
* First pass just to expand any existing macros, we need the macro
|
|
* value to be e.g. a literal "1" at expansion time in the next macro,
|
|
* not "(1)", etc... Standard recursive expansion does not work.
|
|
*/
|
|
#define IS_ENABLED(config_macro) Z_IS_ENABLED1(config_macro)
|
|
|
|
/* Now stick on a "_XXXX" prefix, it will now be "_XXXX1" if config_macro
|
|
* is "1", or just "_XXXX" if it's undefined.
|
|
* ENABLED: Z_IS_ENABLED2(_XXXX1)
|
|
* DISABLED Z_IS_ENABLED2(_XXXX)
|
|
*/
|
|
#define Z_IS_ENABLED1(config_macro) Z_IS_ENABLED2(_XXXX##config_macro)
|
|
|
|
/* Here's the core trick, we map "_XXXX1" to "_YYYY," (i.e. a string
|
|
* with a trailing comma), so it has the effect of making this a
|
|
* two-argument tuple to the preprocessor only in the case where the
|
|
* value is defined to "1"
|
|
* ENABLED: _YYYY, <--- note comma!
|
|
* DISABLED: _XXXX
|
|
*/
|
|
#define _XXXX1 _YYYY,
|
|
|
|
/* Then we append an extra argument to fool the gcc preprocessor into
|
|
* accepting it as a varargs macro.
|
|
* arg1 arg2 arg3
|
|
* ENABLED: Z_IS_ENABLED3(_YYYY, 1, 0)
|
|
* DISABLED Z_IS_ENABLED3(_XXXX 1, 0)
|
|
*/
|
|
#define Z_IS_ENABLED2(one_or_two_args) Z_IS_ENABLED3(one_or_two_args true, false)
|
|
|
|
/* And our second argument is thus now cooked to be 1 in the case
|
|
* where the value is defined to 1, and 0 if not:
|
|
*/
|
|
#define Z_IS_ENABLED3(ignore_this, val, ...) val
|
|
|
|
const char *bt_hex(const void *buf, size_t len);
|
|
|
|
void mem_rcopy(u8_t *dst, u8_t const *src, u16_t len);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _BLE_MESH_UTIL_H_ */
|