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438ab7fa29
Use the new module structure rather the old SwiftShims header. This is much cleaner and lets us include operating system headers to get the relevant definitions where possible. Add code to support ELF and DWARF, including decompression using zlib, zstd and liblzma if those turn out to be required and available. rdar://110261712
58 lines
1.5 KiB
C++
58 lines
1.5 KiB
C++
//===--- Win32Extras.cpp - Windows support functions ------------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2023 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// Defines some extra functions that aren't available in the OS or C library
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// on Windows.
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//
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//===----------------------------------------------------------------------===//
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#ifdef _WIN32
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#include <windows.h>
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#include "modules/OS/Libc.h"
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extern "C" ssize_t pread(int fd, void *buf, size_t nbyte, off_t offset) {
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HANDLE hFile = _get_osfhandle(fd);
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OVERLAPPED ovl = {0};
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DWORD dwBytesRead = 0;
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ovl.Offset = (DWORD)offset;
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ovl.OffsetHigh = (DWORD)(offset >> 32);
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if (!ReadFile(hFile, buf, (DWORD)count, &dwBytesRead, &ovl)) {
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errno = EIO;
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return -1;
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}
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return dwBytesRead;
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}
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extern "C" ssize_t pwrite(int fd, const void *buf, size_t nbyte, off_t offset) {
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HANDLE hFile = _get_osfhandle(fd);
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OVERLAPPED ovl = {0};
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DWORD dwBytesRead = 0;
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ovl.Offset = (DWORD)offset;
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ovl.OffsetHigh = (DWORD)(offset >> 32);
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if (!WriteFile(hFile, buf, (DWORD)count, &dwBytesRead, &ovl)) {
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errno = EIO;
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return -1;
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}
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return dwBytesRead;
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}
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#endif // _WIN32
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