os_kernel_lab/labcodes/lab1/libs/error.h

#ifndef __LIBS_ERROR_H__
#define __LIBS_ERROR_H__

/* kernel error codes -- keep in sync with list in lib/printfmt.c */
#define E_UNSPECIFIED        1    // Unspecified or unknown problem
#define E_BAD_PROC            2    // Process doesn't exist or otherwise
#define E_INVAL                3    // Invalid parameter
#define E_NO_MEM            4    // Request failed due to memory shortage
#define E_NO_FREE_PROC        5    // Attempt to create a new process beyond
#define E_FAULT                6    // Memory fault

/* the maximum allowed */
#define MAXERROR            6

#endif /* !__LIBS_ERROR_H__ */