tmk_core/tool/mbed/mbed-sdk/libraries/mbed/api/mbed_error.h

   1 /* mbed Microcontroller Library
   2  * Copyright (c) 2006-2013 ARM Limited
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 #ifndef MBED_ERROR_H
  17 #define MBED_ERROR_H
  18
  19 /** To generate a fatal compile-time error, you can use the pre-processor #error directive.
  20  *
  21  * @code
  22  * #error "That shouldn't have happened!"
  23  * @endcode
  24  *
  25  * If the compiler evaluates this line, it will report the error and stop the compile.
  26  *
  27  * For example, you could use this to check some user-defined compile-time variables:
  28  *
  29  * @code
  30  * #define NUM_PORTS 7
  31  * #if (NUM_PORTS > 4)
  32  *     #error "NUM_PORTS must be less than 4"
  33  * #endif
  34  * @endcode
  35  *
  36  * Reporting Run-Time Errors:
  37  * To generate a fatal run-time error, you can use the mbed error() function.
  38  *
  39  * @code
  40  * error("That shouldn't have happened!");
  41  * @endcode
  42  *
  43  * If the mbed running the program executes this function, it will print the
  44  * message via the USB serial port, and then die with the blue lights of death!
  45  *
  46  * The message can use printf-style formatting, so you can report variables in the
  47  * message too. For example, you could use this to check a run-time condition:
  48  *
  49  * @code
  50  * if(x >= 5) {
  51  *     error("expected x to be less than 5, but got %d", x);
  52  * }
  53  * #endcode
  54  */
  55
  56 #ifdef __cplusplus
  57 extern "C" {
  58 #endif
  59
  60 void error(const char* format, ...);
  61
  62 #ifdef __cplusplus
  63 }
  64 #endif
  65
  66 #endif