184 lines
7.9 KiB
C
184 lines
7.9 KiB
C
/**************************************************************************/
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/*!
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@file verify.h
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@author hathach
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@section LICENSE
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Software License Agreement (BSD License)
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Copyright (c) 2018, 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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*/
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/**************************************************************************/
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#ifndef TUSB_VERIFY_H_
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#define TUSB_VERIFY_H_
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#include <stdbool.h>
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#include <stdint.h>
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#include "tusb_option.h"
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#include "tusb_compiler.h"
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/*------------------------------------------------------------------*/
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/* This file use an advanced macro technique to mimic the default parameter
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* as C++ for the sake of code simplicity. Beware of a headache macro
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* manipulation that you are told to stay away.
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*
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* e.g
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*
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* - VERIFY( cond ) will return false if cond is false
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* - VERIFY( cond, err) will return err instead if cond is false
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*------------------------------------------------------------------*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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//--------------------------------------------------------------------+
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// VERIFY Helper
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//--------------------------------------------------------------------+
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#if CFG_TUSB_DEBUG >= 1
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#define _MESS_ERR(_err) printf("%s: %d: failed, error = %s\n", __func__, __LINE__, tusb_strerr[_err])
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#define _MESS_FAILED() printf("%s: %d: failed\n", __func__, __LINE__)
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#else
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#define _MESS_ERR(_err)
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#define _MESS_FAILED()
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#endif
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// Halt CPU (breakpoint) when hitting error, only apply for Cortex M3, M4, M7
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#if defined(__ARM_ARCH_7M__) || defined (__ARM_ARCH_7EM__)
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#define verify_breakpoint() \
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do {\
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volatile uint32_t* ARM_CM_DHCSR = ((volatile uint32_t*) 0xE000EDF0UL); /* Cortex M CoreDebug->DHCSR */ \
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if ( (*ARM_CM_DHCSR) & 1UL ) __asm("BKPT #0\n"); /* Only halt mcu if debugger is attached */\
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} while(0)
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#else
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#define verify_breakpoint()
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#endif
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/*------------------------------------------------------------------*/
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/* Macro Generator
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*------------------------------------------------------------------*/
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// Helper to implement optional parameter for VERIFY Macro family
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#define GET_3RD_ARG(arg1, arg2, arg3, ...) arg3
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#define GET_4TH_ARG(arg1, arg2, arg3, arg4, ...) arg4
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/*------------- Generator for VERIFY and VERIFY_HDLR -------------*/
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#define VERIFY_DEFINE(_cond, _handler, _ret) do { if ( !(_cond) ) { _handler; return _ret; } } while(0)
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/*------------- Generator for VERIFY_ERR and VERIFY_ERR_HDLR -------------*/
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#define VERIFY_ERR_DEF2(_error, _handler) \
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do { \
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uint32_t _err = (uint32_t)(_error); \
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if ( 0 != _err ) { _MESS_ERR(_err); _handler; return _err; }\
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} while(0)
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#define VERIFY_ERR_DEF3(_error, _handler, _ret) \
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do { \
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uint32_t _err = (uint32_t)(_error); \
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if ( 0 != _err ) { _MESS_ERR(_err); _handler; return _ret; }\
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} while(0)
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/*------------------------------------------------------------------*/
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/* VERIFY
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* - VERIFY_1ARGS : return false if failed
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* - VERIFY_2ARGS : return provided value if failed
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*------------------------------------------------------------------*/
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#define VERIFY_1ARGS(_cond) VERIFY_DEFINE(_cond, , false)
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#define VERIFY_2ARGS(_cond, _ret) VERIFY_DEFINE(_cond, , _ret)
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#define VERIFY(...) GET_3RD_ARG(__VA_ARGS__, VERIFY_2ARGS, VERIFY_1ARGS)(__VA_ARGS__)
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/*------------------------------------------------------------------*/
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/* VERIFY WITH HANDLER
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* - VERIFY_HDLR_2ARGS : execute handler, return false if failed
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* - VERIFY_HDLR_3ARGS : execute handler, return provided error if failed
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*------------------------------------------------------------------*/
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#define VERIFY_HDLR_2ARGS(_cond, _handler) VERIFY_DEFINE(_cond, _handler, false)
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#define VERIFY_HDLR_3ARGS(_cond, _handler, _ret) VERIFY_DEFINE(_cond, _handler, _ret)
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#define VERIFY_HDLR(...) GET_4TH_ARG(__VA_ARGS__, VERIFY_HDLR_3ARGS, VERIFY_HDLR_2ARGS)(__VA_ARGS__)
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/*------------------------------------------------------------------*/
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/* VERIFY STATUS
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* - VERIFY_ERR_1ARGS : return status of condition if failed
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* - VERIFY_ERR_2ARGS : return provided status code if failed
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*------------------------------------------------------------------*/
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#define VERIFY_ERR_1ARGS(_error) VERIFY_ERR_DEF2(_error, )
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#define VERIFY_ERR_2ARGS(_error, _ret) VERIFY_ERR_DEF3(_error, ,_ret)
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#define VERIFY_ERR(...) GET_3RD_ARG(__VA_ARGS__, VERIFY_ERR_2ARGS, VERIFY_ERR_1ARGS)(__VA_ARGS__)
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/*------------------------------------------------------------------*/
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/* VERIFY STATUS WITH HANDLER
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* - VERIFY_ERR_HDLR_2ARGS : execute handler, return status if failed
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* - VERIFY_ERR_HDLR_3ARGS : execute handler, return provided error if failed
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*------------------------------------------------------------------*/
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#define VERIFY_ERR_HDLR_2ARGS(_error, _handler) VERIFY_ERR_DEF2(_error, _handler)
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#define VERIFY_ERR_HDLR_3ARGS(_error, _handler, _ret) VERIFY_ERR_DEF3(_error, _handler, _ret)
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#define VERIFY_ERR_HDLR(...) GET_4TH_ARG(__VA_ARGS__, VERIFY_ERR_HDLR_3ARGS, VERIFY_ERR_HDLR_2ARGS)(__VA_ARGS__)
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/*------------------------------------------------------------------*/
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/* ASSERT
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* basically VERIFY with verify_breakpoint() as handler
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* - 1 arg : return false if failed
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* - 2 arg : return error if failed
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*------------------------------------------------------------------*/
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#define ASSERT_1ARGS(_cond) VERIFY_DEFINE(_cond, _MESS_FAILED(); verify_breakpoint(), false)
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#define ASSERT_2ARGS(_cond, _ret) VERIFY_DEFINE(_cond, _MESS_FAILED(); verify_breakpoint(), _ret)
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#define TU_ASSERT(...) GET_3RD_ARG(__VA_ARGS__, ASSERT_2ARGS, ASSERT_1ARGS)(__VA_ARGS__)
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/*------------------------------------------------------------------*/
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/* ASSERT Error
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* basically VERIFY Error with verify_breakpoint() as handler
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*------------------------------------------------------------------*/
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#define ASERT_ERR_1ARGS(_error) VERIFY_ERR_DEF2(_error, verify_breakpoint())
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#define ASERT_ERR_2ARGS(_error, _ret) VERIFY_ERR_DEF3(_error, verify_breakpoint(), _ret)
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#define TU_ASSERT_ERR(...) GET_3RD_ARG(__VA_ARGS__, ASERT_ERR_2ARGS, ASERT_ERR_1ARGS)(__VA_ARGS__)
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/*------------------------------------------------------------------*/
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/* ASSERT HDLR
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*------------------------------------------------------------------*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* TUSB_VERIFY_H_ */
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