Something went wrong. Try again.
(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120// SPDX-License-Identifier: GPL-2.0
#include <subcmd/parse-options.h>#include <stdio.h>#include <time.h>#include <strings.h>#include <linux/time64.h>#include "debug.h"#include "clockid.h"#include "record.h"
struct clockid_map { const char *name; int clockid;};
#define CLOCKID_MAP(n, c) \ { .name = n, .clockid = (c), }
#define CLOCKID_END { .name = NULL, }
/* * Add the missing ones, we need to build on many distros... */#ifndef CLOCK_MONOTONIC_RAW#define CLOCK_MONOTONIC_RAW 4#endif#ifndef CLOCK_BOOTTIME#define CLOCK_BOOTTIME 7#endif#ifndef CLOCK_TAI#define CLOCK_TAI 11#endif
static const struct clockid_map clockids[] = { /* available for all events, NMI safe */ CLOCKID_MAP("monotonic", CLOCK_MONOTONIC), CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW),
/* available for some events */ CLOCKID_MAP("realtime", CLOCK_REALTIME), CLOCKID_MAP("boottime", CLOCK_BOOTTIME), CLOCKID_MAP("tai", CLOCK_TAI),
/* available for the lazy */ CLOCKID_MAP("mono", CLOCK_MONOTONIC), CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW), CLOCKID_MAP("real", CLOCK_REALTIME), CLOCKID_MAP("boot", CLOCK_BOOTTIME),
CLOCKID_END,};
static int get_clockid_res(clockid_t clk_id, u64 *res_ns){ struct timespec res;
*res_ns = 0; if (!clock_getres(clk_id, &res)) *res_ns = res.tv_nsec + res.tv_sec * NSEC_PER_SEC; else pr_warning("WARNING: Failed to determine specified clock resolution.\n");
return 0;}
int parse_clockid(const struct option *opt, const char *str, int unset){ struct record_opts *opts = (struct record_opts *)opt->value; const struct clockid_map *cm; const char *ostr = str;
if (unset) { opts->use_clockid = 0; return 0; }
/* no arg passed */ if (!str) return 0;
/* no setting it twice */ if (opts->use_clockid) return -1;
opts->use_clockid = true;
/* if its a number, we're done */ if (sscanf(str, "%d", &opts->clockid) == 1) return get_clockid_res(opts->clockid, &opts->clockid_res_ns);
/* allow a "CLOCK_" prefix to the name */ if (!strncasecmp(str, "CLOCK_", 6)) str += 6;
for (cm = clockids; cm->name; cm++) { if (!strcasecmp(str, cm->name)) { opts->clockid = cm->clockid; return get_clockid_res(opts->clockid, &opts->clockid_res_ns); } }
opts->use_clockid = false; ui__warning("unknown clockid %s, check man page\n", ostr); return -1;}
const char *clockid_name(clockid_t clk_id){ const struct clockid_map *cm;
for (cm = clockids; cm->name; cm++) { if (cm->clockid == clk_id) return cm->name; } return "(not found)";}