96 lines
4.0 KiB
C
96 lines
4.0 KiB
C
/**************************************************************************/
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/*!
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@file tusb_compiler_gcc.h
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@author hathach (tinyusb.org)
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@section LICENSE
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Software License Agreement (BSD License)
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Copyright (c) 2013, hathach (tinyusb.org)
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the copyright holders nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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INCLUDING NEGLIGENCE OR OTHERWISE ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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This file is part of the tinyusb stack.
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*/
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/**************************************************************************/
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/** \ingroup Group_Compiler
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* \defgroup Group_GCC GNU GCC
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* @{ */
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#ifndef _TUSB_COMPILER_GCC_H_
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#define _TUSB_COMPILER_GCC_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define ALIGN_OF(x) __alignof__(x)
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/// This attribute specifies a minimum alignment for the variable or structure field, measured in bytes
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#define ATTR_ALIGNED(Bytes) __attribute__ ((aligned(Bytes)))
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/// Place variable in a specific section
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#define ATTR_SECTION(sec_name) __attribute__ (( section(#sec_name) ))
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/// The packed attribute specifies that a variable or structure field should have
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/// the smallest possible alignment—one byte for a variable, and one bit for a field.
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#define ATTR_PACKED __attribute__ ((packed))
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#define ATTR_PREPACKED
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/// This attribute inlines the function even if no optimization level is specified
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#define ATTR_ALWAYS_INLINE __attribute__ ((always_inline))
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/// The deprecated attribute results in a warning if the function is used anywhere in the source file.
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/// This is useful when identifying functions that are expected to be removed in a future version of a program.
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#define ATTR_DEPRECATED(mess) __attribute__ ((deprecated(mess)))
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/// The weak attribute causes the declaration to be emitted as a weak symbol rather than a global.
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/// This is primarily useful in defining library functions that can be overridden in user code
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#define ATTR_WEAK __attribute__ ((weak))
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/// Warn if a caller of the function with this attribute does not use its return value.
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#define ATTR_WARN_UNUSED_RESULT __attribute__ ((warn_unused_result))
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/// Function is meant to be possibly unused. GCC does not produce a warning for this function.
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#define ATTR_UNUSED __attribute__ ((unused))
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// TODO mcu specific
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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#define __n2be(x) __builtin_bswap32(x) ///< built-in function to convert 32-bit from native to Big Endian
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#define __be2n(x) __n2be(x) ///< built-in function to convert 32-bit from Big Endian to native
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#define __n2be_16(u16) __builtin_bswap16(u16)
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#define __be2n_16(u16) __n2be_16(u16)
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* _TUSB_COMPILER_GCC_H_ */
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/// @}
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