mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 15:03:34 +00:00
e961385e55
wait4() is now solid enough to run `make -j100` on Windows. You can now use MSG_DONTWAIT on Windows. There was a handle leak in accept() that's been fixed. Our WIN32 overlapped i/o code has been simplified. Priority class now inherits into subprocesses, so the verynice command will work and the signal mask will now be inherited by execve() and posix_spawn()
101 lines
4.3 KiB
C
101 lines
4.3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/internal.h"
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#include "libc/calls/sig.internal.h"
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#include "libc/calls/struct/sigset.h"
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#include "libc/errno.h"
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#include "libc/nt/enum/wait.h"
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#include "libc/nt/errors.h"
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#include "libc/nt/struct/overlapped.h"
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#include "libc/nt/thread.h"
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#include "libc/nt/winsock.h"
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#include "libc/sock/internal.h"
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#include "libc/sysv/consts/sicode.h"
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#include "libc/sysv/errfuns.h"
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#include "libc/thread/posixthread.internal.h"
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#ifdef __x86_64__
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textwindows ssize_t
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__winsock_block(int64_t handle, uint32_t flags, bool nonblock,
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uint32_t srwtimeout, sigset_t waitmask,
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int StartSocketOp(int64_t handle, struct NtOverlapped *overlap,
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uint32_t *flags, void *arg),
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void *arg) {
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RestartOperation:
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int rc, sig, reason = 0;
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uint32_t status, exchanged;
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if (_check_cancel() == -1) return -1; // ECANCELED
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if ((sig = __sig_get(waitmask))) goto HandleInterrupt;
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struct NtOverlapped overlap = {.hEvent = WSACreateEvent()};
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rc = StartSocketOp(handle, &overlap, &flags, arg);
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if (rc && WSAGetLastError() == kNtErrorIoPending) {
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if (nonblock) {
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CancelIoEx(handle, &overlap);
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reason = EAGAIN;
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} else {
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struct PosixThread *pt;
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pt = _pthread_self();
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pt->pt_blkmask = waitmask;
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pt->pt_iohandle = handle;
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pt->pt_ioverlap = &overlap;
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atomic_store_explicit(&pt->pt_blocker, PT_BLOCKER_IO,
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memory_order_release);
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status = WSAWaitForMultipleEvents(1, &overlap.hEvent, 0,
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srwtimeout ? srwtimeout : -1u, 0);
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atomic_store_explicit(&pt->pt_blocker, 0, memory_order_release);
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if (status) {
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if (status == kNtWaitTimeout) {
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reason = EAGAIN; // SO_RCVTIMEO or SO_SNDTIMEO elapsed
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} else {
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reason = WSAGetLastError(); // ENETDOWN or ENOBUFS
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}
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CancelIoEx(handle, &overlap);
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}
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}
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rc = 0;
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}
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if (!rc) {
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rc = WSAGetOverlappedResult(handle, &overlap, &exchanged, true, &flags)
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? 0
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: -1;
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}
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WSACloseEvent(overlap.hEvent);
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if (!rc) {
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return exchanged;
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}
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if (WSAGetLastError() == kNtErrorOperationAborted) {
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if (reason) {
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errno = reason;
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return -1;
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}
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if ((sig = __sig_get(waitmask))) {
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HandleInterrupt:
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int handler_was_called = __sig_relay(sig, SI_KERNEL, waitmask);
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if (_check_cancel() == -1) return -1;
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if (handler_was_called != 1) goto RestartOperation;
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}
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return eintr();
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}
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return __winsockerr();
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}
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#endif /* __x86_64__ */
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