Error Codes

Macros
#define	E_OK   0
	No Error (the operation was successful)
#define	E_FAIL   1
	The operation failed.
#define	E_NOMEM   2
	The System ran out of memory.
#define	E_ARG   3
	The given argument is wrong or inacceptable.
#define	E_FORB   4
	The operation is forbidden at the current operation stage.
#define	E_NOMORE   5
	For query operations: End of query (no more elements)
#define	E_NOTFOUND   6
	The query operation was not successfull.

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Detailed Description

Most pico]OS functions return a signed integer value describing the execution status of the function. Generally, a negative value denotes an error, zero means success (no error), and a positive value may be returned as result of a successful operation. To check if an operation was successful, you need only to test if the returned value is positiv ( status >= 0 ). For example, if you would like to test if a function failed because the system ran out of memory, you may test the status against the (negativ) value -E_NOMEM.