175 lines
7.4 KiB
C
175 lines
7.4 KiB
C
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 Ha Thach (tinyusb.org)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies 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 included in
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* 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, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* This file is part of the TinyUSB stack.
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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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* - TU_VERIFY( cond ) will return false if cond is false
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* - TU_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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// TU_VERIFY Helper
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//--------------------------------------------------------------------+
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#if CFG_TUSB_DEBUG
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#include <stdio.h>
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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 TU_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 TU_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 TU_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 TU_VERIFY and TU_VERIFY_HDLR -------------*/
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#define TU_VERIFY_DEFINE(_cond, _handler, _ret) do { if ( !(_cond) ) { _handler; return _ret; } } while(0)
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/*------------- Generator for TU_VERIFY_ERR and TU_VERIFY_ERR_HDLR -------------*/
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#define TU_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 TU_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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/* TU_VERIFY
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* - TU_VERIFY_1ARGS : return false if failed
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* - TU_VERIFY_2ARGS : return provided value if failed
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*------------------------------------------------------------------*/
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#define TU_VERIFY_1ARGS(_cond) TU_VERIFY_DEFINE(_cond, , false)
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#define TU_VERIFY_2ARGS(_cond, _ret) TU_VERIFY_DEFINE(_cond, , _ret)
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#define TU_VERIFY(...) GET_3RD_ARG(__VA_ARGS__, TU_VERIFY_2ARGS, TU_VERIFY_1ARGS)(__VA_ARGS__)
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/*------------------------------------------------------------------*/
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/* TU_VERIFY WITH HANDLER
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* - TU_VERIFY_HDLR_2ARGS : execute handler, return false if failed
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* - TU_VERIFY_HDLR_3ARGS : execute handler, return provided error if failed
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*------------------------------------------------------------------*/
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#define TU_VERIFY_HDLR_2ARGS(_cond, _handler) TU_VERIFY_DEFINE(_cond, _handler, false)
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#define TU_VERIFY_HDLR_3ARGS(_cond, _handler, _ret) TU_VERIFY_DEFINE(_cond, _handler, _ret)
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#define TU_VERIFY_HDLR(...) GET_4TH_ARG(__VA_ARGS__, TU_VERIFY_HDLR_3ARGS, TU_VERIFY_HDLR_2ARGS)(__VA_ARGS__)
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/*------------------------------------------------------------------*/
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/* TU_VERIFY STATUS
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* - TU_VERIFY_ERR_1ARGS : return status of condition if failed
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* - TU_VERIFY_ERR_2ARGS : return provided status code if failed
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*------------------------------------------------------------------*/
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#define TU_VERIFY_ERR_1ARGS(_error) TU_VERIFY_ERR_DEF2(_error, )
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#define TU_VERIFY_ERR_2ARGS(_error, _ret) TU_VERIFY_ERR_DEF3(_error, ,_ret)
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#define TU_VERIFY_ERR(...) GET_3RD_ARG(__VA_ARGS__, TU_VERIFY_ERR_2ARGS, TU_VERIFY_ERR_1ARGS)(__VA_ARGS__)
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/*------------------------------------------------------------------*/
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/* TU_VERIFY STATUS WITH HANDLER
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* - TU_VERIFY_ERR_HDLR_2ARGS : execute handler, return status if failed
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* - TU_VERIFY_ERR_HDLR_3ARGS : execute handler, return provided error if failed
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*------------------------------------------------------------------*/
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#define TU_VERIFY_ERR_HDLR_2ARGS(_error, _handler) TU_VERIFY_ERR_DEF2(_error, _handler)
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#define TU_VERIFY_ERR_HDLR_3ARGS(_error, _handler, _ret) TU_VERIFY_ERR_DEF3(_error, _handler, _ret)
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#define TU_VERIFY_ERR_HDLR(...) GET_4TH_ARG(__VA_ARGS__, TU_VERIFY_ERR_HDLR_3ARGS, TU_VERIFY_ERR_HDLR_2ARGS)(__VA_ARGS__)
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/*------------------------------------------------------------------*/
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/* ASSERT
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* basically TU_VERIFY with TU_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) TU_VERIFY_DEFINE(_cond, _MESS_FAILED(); TU_BREAKPOINT(), false)
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#define ASSERT_2ARGS(_cond, _ret) TU_VERIFY_DEFINE(_cond, _MESS_FAILED(); TU_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 TU_VERIFY Error with TU_BREAKPOINT() as handler
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*------------------------------------------------------------------*/
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#define ASERT_ERR_1ARGS(_error) TU_VERIFY_ERR_DEF2(_error, TU_BREAKPOINT())
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#define ASERT_ERR_2ARGS(_error, _ret) TU_VERIFY_ERR_DEF3(_error, TU_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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