owner-nrf52sdk/nRF5_SDK_15.2.0/components/libraries/util/sdk_macros.h

/**
 * Copyright (c) 2013 - 2018, Nordic Semiconductor ASA
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, must reproduce the above copyright notice, this list of
 *    conditions and the following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 *
 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * 4. This software, with or without modification, must only be used with a
 *    Nordic Semiconductor ASA integrated circuit.
 *
 * 5. Any software provided in binary form under this license must not be reverse
 *    engineered, decompiled, modified and/or disassembled.
 *
 * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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/**@file
 *

 * @defgroup sdk_common_macros SDK Common Header
 * @ingroup app_common
 * @brief Macros for parameter checking and similar tasks
 * @{
 */

#ifndef SDK_MACROS_H__
#define SDK_MACROS_H__

#include "nrf_assert.h"

#ifdef __cplusplus
extern "C" {
#endif


/**@brief   Macro for parameter checking.
 *
 * If @p _cond evaluates to true, does nothing. Otherwise,
 * if @p _module ## _PARAM_CHECK_DISABLED is @e not set (default), prints an error message
 * if @p _printfn is provided, and returns from the calling function context with code @p _err.
 * If @p _module ## _PARAM_CHECK_DISABLED is set, behaves like the ASSERT macro.
 *
 * Parameter checking implemented using this macro can be optionally turned off for release code.
 * Only disable runtime parameter checks if size if a major concern.
 *
 * @param _module   The module name.
 * @param _cond     The condition to be evaluated.
 * @param _err      The error to be returned.
 * @param _printfn  A printf-compatible function used to log the error.
 *                  Leave empty if no logging is needed.
 *
 * @hideinitializer
 */
/*lint -esym(666, NRF_PARAM_CHECK*) : Expression with side effects passed to macro */
#define NRF_PARAM_CHECK(_module, _cond, _err, _printfn)                                             \
    do                                                                                              \
    {                                                                                               \
        if ((_cond))                                                                                \
        {                                                                                           \
            /* Do nothing. */                                                                       \
        }                                                                                           \
        else if (!(_module ## _PARAM_CHECK_DISABLED))                                               \
        {                                                                                           \
            _printfn("%s check failed in %s() with value 0x%x.", #_cond, __func__, _err);           \
            return (_err);                                                                          \
        }                                                                                           \
        else                                                                                        \
        {                                                                                           \
            ASSERT((_cond));                                                                        \
        }                                                                                           \
    } while (0);


/**@brief Macro for verifying statement to be true. It will cause the exterior function to return
 *        err_code if the statement is not true.
 *
 * @param[in]   statement   Statement to test.
 * @param[in]   err_code    Error value to return if test was invalid.
 *
 * @retval      nothing, but will cause the exterior function to return @p err_code if @p statement
 *              is false.
 */
#define VERIFY_TRUE(statement, err_code)    \
do                                          \
{                                           \
    if (!(statement))                       \
    {                                       \
        return err_code;                    \
    }                                       \
} while (0)


/**@brief Macro for verifying statement to be true. It will cause the exterior function to return
 *        if the statement is not true.
 *
 * @param[in]   statement   Statement to test.
 */
#define VERIFY_TRUE_VOID(statement) VERIFY_TRUE((statement), )


/**@brief Macro for verifying statement to be false. It will cause the exterior function to return
 *        err_code if the statement is not false.
 *
 * @param[in]   statement   Statement to test.
 * @param[in]   err_code    Error value to return if test was invalid.
 *
 * @retval      nothing, but will cause the exterior function to return @p err_code if @p statement
 *              is true.
 */
#define VERIFY_FALSE(statement, err_code)   \
do                                          \
{                                           \
    if ((statement))                        \
    {                                       \
        return err_code;                    \
    }                                       \
} while (0)


/**@brief Macro for verifying statement to be false. It will cause the exterior function to return
 *        if the statement is not false.
 *
 * @param[in]   statement    Statement to test.
 */
#define VERIFY_FALSE_VOID(statement) VERIFY_FALSE((statement), )


/**@brief Macro for verifying that a function returned NRF_SUCCESS. It will cause the exterior
 *        function to return error code of statement if it is not @ref NRF_SUCCESS.
 *
 * @param[in] statement     Statement to check against NRF_SUCCESS.
 */
#define VERIFY_SUCCESS(statement)                       \
do                                                      \
{                                                       \
    uint32_t _err_code = (uint32_t) (statement);        \
    if (_err_code != NRF_SUCCESS)                       \
    {                                                   \
        return _err_code;                               \
    }                                                   \
} while(0)


/**@brief Macro for verifying that a function returned NRF_SUCCESS. It will cause the exterior
 *        function to return if the err_code is not @ref NRF_SUCCESS.
 *
 * @param[in] err_code The error code to check.
 */
#define VERIFY_SUCCESS_VOID(err_code) VERIFY_TRUE_VOID((err_code) == NRF_SUCCESS)


/**@brief Macro for verifying that the module is initialized. It will cause the exterior function to
 *        return @ref NRF_ERROR_INVALID_STATE if not.
 *
 * @note MODULE_INITIALIZED must be defined in each module using this macro. MODULE_INITIALIZED
 *       should be true if the module is initialized, false if not.
 */
#define VERIFY_MODULE_INITIALIZED() VERIFY_TRUE((MODULE_INITIALIZED), NRF_ERROR_INVALID_STATE)


/**@brief Macro for verifying that the module is initialized. It will cause the exterior function to
 *        return if not.
 *
 * @note MODULE_INITIALIZED must be defined in each module using this macro. MODULE_INITIALIZED
 *       should be true if the module is initialized, false if not.
 */
#define VERIFY_MODULE_INITIALIZED_VOID() VERIFY_TRUE_VOID((MODULE_INITIALIZED))


/**@brief Macro for verifying that the module is initialized. It will cause the exterior function to
 *        return if not.
 *
 * @param[in] param  The variable to check if is NULL.
 */
#define VERIFY_PARAM_NOT_NULL(param) VERIFY_FALSE(((param) == NULL), NRF_ERROR_NULL)


/**@brief Macro for verifying that the module is initialized. It will cause the exterior function to
 *        return if not.
 *
 * @param[in] param  The variable to check if is NULL.
 */
#define VERIFY_PARAM_NOT_NULL_VOID(param) VERIFY_FALSE_VOID(((param) == NULL))

/** @} */

#ifdef __cplusplus
}
#endif

#endif // SDK_MACROS_H__