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libc/intrin/createfilemapping.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/calls/internal.h"
+#include "libc/calls/strace.internal.h"
+#include "libc/intrin/describeflags.internal.h"
+#include "libc/nt/memory.h"
+#include "libc/nt/struct/securityattributes.h"
+
+extern typeof(CreateFileMapping) *const __imp_CreateFileMappingW __msabi;
+
+/**
+ * Creates file mapping object on the New Technology.
+ *
+ * @param opt_hFile may be -1 for MAP_ANONYMOUS behavior
+ * @return handle, or 0 on failure
+ * @note this wrapper takes care of ABI, STRACE(), and __winerr()
+ * @see MapViewOfFileEx()
+ */
+textwindows int64_t CreateFileMapping(
+    int64_t opt_hFile,
+    const struct NtSecurityAttributes *opt_lpFileMappingAttributes,
+    uint32_t flProtect, uint32_t dwMaximumSizeHigh, uint32_t dwMaximumSizeLow,
+    const char16_t *opt_lpName) {
+  int64_t hHandle;
+  hHandle = __imp_CreateFileMappingW(opt_hFile, opt_lpFileMappingAttributes,
+                                     flProtect, dwMaximumSizeHigh,
+                                     dwMaximumSizeLow, opt_lpName);
+  if (!hHandle) __winerr();
+  STRACE("CreateFileMapping(%ld, %s, max:%'zu, name:%#hs) → %ld% m", opt_hFile,
+         DescribeNtPageFlags(flProtect),
+         (uint64_t)dwMaximumSizeHigh << 32 | dwMaximumSizeLow, opt_lpName,
+         hHandle);
+  return hHandle;
+}