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