Diff: capi/error.h

Revision:

0:fd0d7bdfcdc2

Child:

1:62685faffa05

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/capi/error.h	Tue Nov 20 17:24:08 2012 +0000
@@ -0,0 +1,72 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#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
+ */
+
+#include <stdlib.h>
+#include "device.h"
+
+#ifdef DEVICE_STDIO_ERROR
+    #include <stdio.h>
+    #define error(...) (fprintf(stderr, __VA_ARGS__), exit(1))
+#else
+    #define error(...) (exit(1))
+#endif
+
+#endif