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