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Get threads working on all platforms

Browse source 
We now have a high-quality clone() implementation for creating
lightweight threads on Linux/Windows/FreeBSD/NetBSD/OpenBSD.
This commit is contained in:
Justine Tunney 2022-05-12 17:52:13 -07:00
parent 4e62cefa6e
commit fec396037a
43 changed files with 850 additions and 532 deletions
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35
examples/shell.c
View file

@ -11,16 +11,21 @@
#include "libc/calls/sigbits.h"
#include "libc/calls/struct/sigaction.h"
#include "libc/calls/struct/sigset.h"
#include "libc/calls/struct/timespec.h"
#include "libc/fmt/fmt.h"
#include "libc/fmt/itoa.h"
#include "libc/log/internal.h"
#include "libc/log/log.h"
#include "libc/macros.internal.h"
#include "libc/runtime/internal.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/append.internal.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/clock.h"
#include "libc/sysv/consts/dt.h"
#include "libc/sysv/consts/sig.h"
#include "libc/time/time.h"
#include "libc/x/x.h"
#include "third_party/linenoise/linenoise.h"
@ -102,7 +107,11 @@ static char *ShellHint(const char *p, const char **ansi1, const char **ansi2) {
}
int main(int argc, char *argv[]) {
bool timeit;
int64_t nanos;
int n, ws, pid;
struct rusage ru;
struct timespec ts1, ts2;
char *prog, path[PATH_MAX];
sigset_t chldmask, savemask;
struct sigaction ignore, saveint, savequit;
@ -114,6 +123,12 @@ int main(int argc, char *argv[]) {
while ((line = linenoiseWithHistory(prompt, "cmd"))) {
n = 0;
start = line;
if (startswith(start, "time ")) {
timeit = true;
start += 5;
} else {
timeit = false;
}
args = xcalloc(1, sizeof(*args));
while ((arg = strtok_r(start, " \t\r\n", &state))) {
args = xrealloc(args, (++n + 1) * sizeof(*args));
@ -132,6 +147,9 @@ int main(int argc, char *argv[]) {
sigaddset(&chldmask, SIGCHLD);
sigprocmask(SIG_BLOCK, &chldmask, &savemask);
if (timeit) {
clock_gettime(CLOCK_REALTIME, &ts1);
}
if (!fork()) {
sigaction(SIGINT, &saveint, 0);
sigaction(SIGQUIT, &savequit, 0);
@ -139,8 +157,23 @@ int main(int argc, char *argv[]) {
execv(prog, args);
_Exit(127);
}
wait4(0, &ws, 0, &ru);
if (timeit) {
clock_gettime(CLOCK_REALTIME, &ts2);
if (ts2.tv_sec == ts1.tv_sec) {
nanos = ts2.tv_nsec - ts1.tv_nsec;
} else {
nanos = (ts2.tv_sec - ts1.tv_sec) * 1000000000LL;
nanos += 1000000000LL - ts1.tv_nsec;
nanos += ts2.tv_nsec;
}
printf("took %,ldµs wall time\n", nanos / 1000);
p = 0;
AppendResourceReport(&p, &ru, "\n");
fputs(p, stdout);
free(p);
}
wait(&ws);
p = prompt;
if (WIFEXITED(ws)) {
if (WEXITSTATUS(ws)) {