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Make important improvements

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- Fix preadv() and pwritev() for old distros
- Introduce _npassert() and _unassert() macros
- Prove that file locks work properly on Windows
- Support fcntl(F_DUPFD_CLOEXEC) on more systems
This commit is contained in:
Justine Tunney 2022-09-14 21:29:50 -07:00
parent 1ad2f530f9
commit 3f49889841
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GPG key ID: BE714B4575D6E328
130 changed files with 1225 additions and 431 deletions
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56
examples/clock_getres.c Normal file
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#if 0
/*─────────────────────────────────────────────────────────────────╗
│ To the extent possible under law, Justine Tunney has waived │
│ all copyright and related or neighboring rights to this file, │
│ as it is written in the following disclaimers: │
│ • http://unlicense.org/ │
│ • http://creativecommons.org/publicdomain/zero/1.0/ │
╚─────────────────────────────────────────────────────────────────*/
#endif
#include "libc/calls/struct/timespec.h"
#include "libc/errno.h"
#include "libc/intrin/describeflags.internal.h"
#include "libc/intrin/kprintf.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/clock.h"
int n;
int shown[64];
void show(int clock) {
int i;
struct timespec ts;
if (clock == 127) return;
for (i = 0; i < n; ++i) {
if (shown[i] == clock) {
return;
}
}
shown[n++] = clock;
if (clock_getres(clock, &ts) != -1) {
kprintf("%s %'ld ns\n", DescribeClockName(clock), _timespec_tonanos(ts));
} else {
kprintf("%s %s\n", DescribeClockName(clock), _strerrno(errno));
}
}
int main(int argc, char *argv[]) {
show(CLOCK_REALTIME);
show(CLOCK_REALTIME_FAST);
show(CLOCK_REALTIME_PRECISE);
show(CLOCK_MONOTONIC);
show(CLOCK_MONOTONIC_RAW);
show(CLOCK_MONOTONIC_FAST);
show(CLOCK_MONOTONIC_PRECISE);
show(CLOCK_PROCESS_CPUTIME_ID);
show(CLOCK_THREAD_CPUTIME_ID);
show(CLOCK_PROF);
show(CLOCK_BOOTTIME);
show(CLOCK_REALTIME_ALARM);
show(CLOCK_BOOTTIME_ALARM);
show(CLOCK_TAI);
show(CLOCK_UPTIME);
show(CLOCK_UPTIME_PRECISE);
show(CLOCK_UPTIME_FAST);
show(CLOCK_SECOND);
}