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53 lines
3.3 KiB
C
53 lines
3.3 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 2022 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/assert.h"
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#include "libc/calls/syscall_support-nt.internal.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/nt/enum/filemapflags.h"
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#include "libc/nt/memory.h"
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__msabi extern typeof(MapViewOfFileEx) *const __imp_MapViewOfFileEx;
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/**
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* Maps view of file mapping into memory on the New Technology.
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*
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* @param hFileMappingObject was returned by CreateFileMapping()
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* @param dwDesiredAccess has kNtFileMap... flags
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* @param opt_lpDesiredBaseAddress may be NULL to let o/s choose
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* @return base address, or NULL on failure
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* @note this wrapper takes care of ABI, STRACE(), and __winerr()
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*/
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textwindows void *MapViewOfFileEx(int64_t hFileMappingObject,
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uint32_t dwDesiredAccess,
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uint32_t dwFileOffsetHigh,
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uint32_t dwFileOffsetLow,
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size_t dwNumberOfBytesToMap,
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void *opt_lpDesiredBaseAddress) {
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void *pStartingAddress;
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pStartingAddress = __imp_MapViewOfFileEx(
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hFileMappingObject, dwDesiredAccess, dwFileOffsetHigh, dwFileOffsetLow,
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dwNumberOfBytesToMap, opt_lpDesiredBaseAddress);
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if (!pStartingAddress) __winerr();
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NTTRACE("MapViewOfFileEx(%ld, %s, %'ld, %'zu, %p) → %p% m",
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hFileMappingObject, DescribeNtFileMapFlags(dwDesiredAccess),
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(uint64_t)dwFileOffsetHigh << 32 | dwFileOffsetLow,
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dwNumberOfBytesToMap, opt_lpDesiredBaseAddress, pStartingAddress);
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return pStartingAddress;
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}
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