112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
/******************************************************************************
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* The MIT License
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*
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* Copyright (c) 2010 Perry Hung.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*****************************************************************************/
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/**
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* @file libmaple/include/libmaple/util.h
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* @brief Miscellaneous utility macros and procedures.
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*/
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#ifndef _LIBMAPLE_UTIL_H_
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#define _LIBMAPLE_UTIL_H_
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#ifdef __cplusplus
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extern "C"{
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#endif
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#include <libmaple/libmaple_types.h>
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/*
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* Bit manipulation
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*/
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/** 1UL shifted left by 'shift' */
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#define BIT(shift) (1UL << (shift))
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/** 'Mask' shifted left by 'shift' */
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#define BIT_MASK_SHIFT(mask, shift) ((mask) << (shift))
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/** Bits m to n of x */
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#define GET_BITS(x, m, n) ((((uint32)x) << (31 - (n))) >> ((31 - (n)) + (m)))
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/** True iff v is a power of two (1, 2, 4, 8, ...) */
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#define IS_POWER_OF_TWO(v) ((v) && !((v) & ((v) - 1)))
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/*
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* Failure routines
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*/
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void __error(void);
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void _fail(const char*, int, const char*);
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void throb(void);
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/*
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* Asserts and debug levels
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*/
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#define DEBUG_NONE 0
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#define DEBUG_FAULT 1
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#define DEBUG_ALL 2
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/**
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* \def DEBUG_LEVEL
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*
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* Controls the level of assertion checking.
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*
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* The higher the debug level, the more assertions will be compiled
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* in. This increases the amount of debugging information, but slows
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* down (and increases the size of) the binary.
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*
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* The debug levels, from lowest to highest, are DEBUG_NONE,
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* DEBUG_FAULT, and DEBUG_ALL. The default level is DEBUG_ALL.
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*/
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#ifndef DEBUG_LEVEL
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#define DEBUG_LEVEL DEBUG_ALL
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#endif
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#if DEBUG_LEVEL >= DEBUG_ALL
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#define ASSERT(exp) \
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if (exp) { \
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} else { \
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_fail(__FILE__, __LINE__, #exp); \
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}
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#else
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#define ASSERT(exp) (void)((0))
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#endif
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#if DEBUG_LEVEL >= DEBUG_FAULT
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#define ASSERT_FAULT(exp) \
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if (exp) { \
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} else { \
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_fail(__FILE__, __LINE__, #exp); \
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}
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#else
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#define ASSERT_FAULT(exp) (void)((0))
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#endif
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif
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