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#ifndef HEADER_UTILS_H
#define HEADER_UTILS_H
#include <ctype.h>
#include <assert.h>
#include <sys/time.h>
#include <limits.h>
#include <stdint.h>
#define SECTOR_SIZE (512)
#define GIGABYTES (1024 * 1024 * 1024)
const char *adjust_unit(double *ptr_bytes);
/* Return true if @filename matches the regex /^[0-9]+\.h2w$/ */
int is_my_file(const char *filename);
/* Caller must free(3) the returned pointer. */
char *full_fn_from_number(const char **filename, const char *path, long num);
static inline long delay_ms(const struct timeval *t1, const struct timeval *t2)
{
return (t2->tv_sec - t1->tv_sec) * 1000 +
(t2->tv_usec - t1->tv_usec) / 1000;
}
int parse_args(const char *name, int argc, char **argv,
long *pstart_at, long *pend_at, const char **ppath);
const long *ls_my_files(const char *path, long start_at, long end_at);
void print_header(FILE *f, const char *name);
static inline uint64_t random_number(uint64_t prv_number)
{
return prv_number * 4294967311ULL + 17;
}
#if __APPLE__ && __MACH__
/* For function fcntl. */
#include <fcntl.h>
/* For type off_t. */
#include <unistd.h>
/* This function is a _rough_ approximation of fdatasync(2). */
static inline int fdatasync(int fd)
{
return fcntl(fd, F_FULLFSYNC);
}
#define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
#define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
/* This function is a _rough_ approximation of posix_fadvise(2). */
static inline int posix_fadvise(int fd, off_t offset, off_t len, int advice)
{
switch (advice) {
case POSIX_FADV_SEQUENTIAL:
return fcntl(fd, F_RDAHEAD, 1);
case POSIX_FADV_DONTNEED:
return fcntl(fd, F_NOCACHE, 1);
default:
assert(0);
}
}
#endif /* Apple Macintosh */
#ifdef __FreeBSD__
#define fdatasync(fd) fsync(fd)
#endif
#endif /* HEADER_UTILS_H */
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