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mbed-classic/api/mbed_error.h

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/* mbed Microcontroller Library
* Copyright (c) 2006-2013 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef MBED_ERROR_H
#define MBED_ERROR_H
/** To generate a fatal compile-time error, you can use the pre-processor #error directive.
*
* @code
* #error "That shouldn't have happened!"
* @endcode
*
* If the compiler evaluates this line, it will report the error and stop the compile.
*
* For example, you could use this to check some user-defined compile-time variables:
*
* @code
* #define NUM_PORTS 7
* #if (NUM_PORTS > 4)
* #error "NUM_PORTS must be less than 4"
* #endif
* @endcode
*
* Reporting Run-Time Errors:
* To generate a fatal run-time error, you can use the mbed error() function.
*
* @code
* error("That shouldn't have happened!");
* @endcode
*
* If the mbed running the program executes this function, it will print the
* message via the USB serial port, and then die with the blue lights of death!
*
* The message can use printf-style formatting, so you can report variables in the
* message too. For example, you could use this to check a run-time condition:
*
* @code
* if(x >= 5) {
* error("expected x to be less than 5, but got %d", x);
* }
* #endcode
*/
#ifdef __cplusplus
extern "C" {
#endif
void error(const char* format, ...);
#ifdef __cplusplus
}
#endif
#endif