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Justine Tunney 2020-06-15 07:18:57 -07:00
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libc/calls/wait4-nt.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/calls/struct/rusage.h"
#include "libc/conv/conv.h"
#include "libc/nt/accounting.h"
#include "libc/nt/enum/status.h"
#include "libc/nt/runtime.h"
#include "libc/nt/struct/filetime.h"
#include "libc/nt/synchronization.h"
#include "libc/runtime/runtime.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/w.h"
#include "libc/sysv/errfuns.h"
textwindows int wait4$nt(int pid, int *opt_out_wstatus, int options,
struct rusage *opt_out_rusage) {
uint32_t dwExitCode;
struct NtFileTime createfiletime, exitfiletime, kernelfiletime, userfiletime;
if (!isfdkind(pid, kFdProcess)) return esrch();
for (;;) {
dwExitCode = kNtStillActive;
if (!(options & WNOHANG)) {
WaitForSingleObject(g_fds.p[pid].handle, 0xffffffff);
}
if (GetExitCodeProcess(g_fds.p[pid].handle, &dwExitCode)) {
if (dwExitCode != kNtStillActive) {
if (opt_out_wstatus) { /* @see WEXITSTATUS() */
*opt_out_wstatus = (dwExitCode & 0xff) << 8;
}
if (opt_out_rusage) {
memset(opt_out_rusage, 0, sizeof(*opt_out_rusage));
GetProcessTimes(GetCurrentProcess(), &createfiletime, &exitfiletime,
&kernelfiletime, &userfiletime);
filetimetotimeval(&opt_out_rusage->ru_utime, userfiletime);
filetimetotimeval(&opt_out_rusage->ru_stime, kernelfiletime);
}
return pid;
} else if (options & WNOHANG) {
return pid;
} else {
continue;
}
} else {
return winerr();
}
}
}