Get life.com in MODE=tiny back down to 12kb

libc/intrin/mapviewoffileex.greg.c

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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 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/assert.h"
+#include "libc/calls/internal.h"
+#include "libc/calls/strace.internal.h"
+#include "libc/intrin/describeflags.internal.h"
+#include "libc/nt/enum/filemapflags.h"
+#include "libc/nt/memory.h"
+
+extern typeof(MapViewOfFileEx) *const __imp_MapViewOfFileEx __msabi;
+
+/**
+ * Maps view of file mapping into memory on the New Technology.
+ *
+ * @param hFileMappingObject was returned by CreateFileMapping()
+ * @param dwDesiredAccess has kNtFileMap... flags
+ * @param opt_lpDesiredBaseAddress may be NULL to let o/s choose
+ * @return base address, or NULL on failure
+ * @note this wrapper takes care of ABI, STRACE(), and __winerr()
+ */
+textwindows void *MapViewOfFileEx(int64_t hFileMappingObject,
+                                  uint32_t dwDesiredAccess,
+                                  uint32_t dwFileOffsetHigh,
+                                  uint32_t dwFileOffsetLow,
+                                  size_t dwNumberOfBytesToMap,
+                                  void *opt_lpDesiredBaseAddress) {
+  void *pStartingAddress;
+  pStartingAddress = __imp_MapViewOfFileEx(
+      hFileMappingObject, dwDesiredAccess, dwFileOffsetHigh, dwFileOffsetLow,
+      dwNumberOfBytesToMap, opt_lpDesiredBaseAddress);
+  if (!pStartingAddress) __winerr();
+  STRACE("MapViewOfFileEx(%ld, %s, off:%'ld, size:%'zu, %p) → %p% m",
+         hFileMappingObject, DescribeNtFileMapFlags(dwDesiredAccess),
+         (uint64_t)dwFileOffsetHigh << 32 | dwFileOffsetLow,
+         dwNumberOfBytesToMap, opt_lpDesiredBaseAddress, pStartingAddress);
+  return pStartingAddress;
+}