Make fixes and improvements

- Introduce __assert_disable global
- Improve strsignal() thread safety
- Make system call tracing thread safe
- Fix SO_RCVTIMEO / SO_SNDTIMEO on Windows
- Refactor DescribeFoo() functions into one place
- Fix fork() on Windows when TLS and MAP_STACK exist
- Round upwards in setsockopt(SO_RCVTIMEO) on Windows
- Disable futexes on OpenBSD which seem extremely broken
- Implement a better kludge for monotonic time on Windows

libc/intrin/wsawaitformultipleevents.c

@@ -0,0 +1,46 @@
+/*-*- 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 2022 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ Permission to use, copy, modify, and/or distribute this software for         │
+│ any purpose with or without fee is hereby granted, provided that the         │
+│ above copyright notice and this permission notice appear in all copies.      │
+│                                                                              │
+│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
+│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
+│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
+│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
+│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
+│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
+│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
+│ PERFORMANCE OF THIS SOFTWARE.                                                │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/calls/strace.internal.h"
+#include "libc/calls/syscall_support-nt.internal.h"
+#include "libc/intrin/describeflags.internal.h"
+#include "libc/intrin/kprintf.h"
+#include "libc/nt/thunk/msabi.h"
+#include "libc/nt/winsock.h"
+
+__msabi extern typeof(WSAWaitForMultipleEvents) *const
+    __imp_WSAWaitForMultipleEvents;
+
+/**
+ * Waits for events on Windows sockets.
+ *
+ * @return 0 on success, or -1 on failure
+ * @note this wrapper takes care of ABI, STRACE(), and __winerr()
+ */
+textwindows uint32_t WSAWaitForMultipleEvents(uint32_t cEvents,
+                                              const int64_t *lphEvents,
+                                              bool32 fWaitAll,
+                                              uint32_t dwTimeout_ms,
+                                              bool32 fAlertable) {
+  uint32_t rc;
+  rc = __imp_WSAWaitForMultipleEvents(cEvents, lphEvents, fWaitAll,
+                                      dwTimeout_ms, fAlertable);
+  POLLTRACE("WSAWaitForMultipleEvents(%u, %p, %hhhd, %'u, %hhhd) → %u% lm",
+            cEvents, lphEvents, fWaitAll, dwTimeout_ms, fAlertable, rc);
+  return rc;
+}