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gex-core/utils/macro.h

75 lines
2.2 KiB

7 years ago
/**
* @file macro.h
* @brief useful things + Special asserts and macros
*
* DAPLink Interface Firmware
* Copyright (c) 2009-2016, ARM Limited, All Rights Reserved
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef VFS_MACRO_H
#define VFS_MACRO_H
#ifdef __cplusplus
extern "C" {
#endif
// --------------- VFS macros and general purpose --------------------
#define ELEMENTS_IN_ARRAY(array) (sizeof(array)/sizeof(array[0]))
#define MB(size) ((size) * 1024 * 1024)
#define KB(size) ((size) * 1024)
#ifndef MIN
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
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#endif
#ifndef MAX
#define MAX(a,b) (((a) > (b)) ? (a) : (b))
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#endif
#define ROUND_UP(value, boundary) ((value) + ((boundary) - (value)) % (boundary))
#define ROUND_DOWN(value, boundary) ((value) - ((value) % (boundary)))
// ---------- HELPERS FOR XMACROS -----------------
#define XJOIN(a, b) a##b
#define STR_(x) #x
#define STR(x) STR_(x)
// ---------- COMPILER SPECIAL MACROS -------------
#define COMPILER_CONCAT_(a, b) a##b
#define COMPILER_CONCAT(a, b) COMPILER_CONCAT_(a, b)
// Divide by zero if the the expression is false. This
// causes an error at compile time.
//
// The special value '__COUNTER__' is used to create a unique value to
// append to 'compiler_assert_' to create a unique token. This prevents
// conflicts resulting from the same enum being declared multiple times.
#define COMPILER_ASSERT(e) enum { COMPILER_CONCAT(compiler_assert_, __COUNTER__) = 1/((e) ? 1 : 0) }
#define __at(_addr) __attribute__ ((at(_addr)))
#ifdef __cplusplus
}
#endif
#endif