system.h

/**
 * Tony Givargis
 * Copyright (C), 2023
 * University of California, Irvine
 *
 * CS 238P - Operating Systems
 * system.h
 */

#ifndef _SYSTEM_H_
#define _SYSTEM_H_

#include <time.h>
#include <errno.h>
#include <ctype.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stddef.h>
#include <string.h>
#include <assert.h>

#define MIN(x, y) ( ((x) < (y)) ? (x) : (y) )
#define MAX(x, y) ( ((x) > (y)) ? (x) : (y) )

#define ARRAY_SIZE(a) ( (sizeof (a)) / (sizeof (a[0])) )

#define RESTORE_FROM_FILE 1

#define UNUSED(s)                \
    do {                    \
        (void)(s);            \
    } while (0)

#define TRACE(s)                \
    do {                    \
        fprintf(stderr,            \
            "error: %s:%d: %s\n",    \
            __FILE__,        \
            __LINE__,        \
            safe_strlen(s) ?    \
            (s) : "^");        \
    } while (0)

#define EXIT(s)                    \
    do {                    \
        TRACE((s));            \
        assert( 0 );            \
        exit(-1);            \
    } while (0)

#define FREE(p)                    \
    do {                    \
        if ((p)) {            \
            free((void *)(p));    \
            (p) = NULL;        \
        }                \
    } while (0)

uint64_t ref_time(void);

void us_sleep(uint64_t us);

void file_delete(const char *pathname);

void safe_sprintf(char *buf, size_t len, const char *format, ...);

size_t safe_strlen(const char *s);

size_t page_size(void);

void *memory_align(void *p, size_t n);

#endif /* _SYSTEM_H_ */