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760cc57bef
Move the backtracing code into a new Runtime module. This means renaming the Swift Runtime's CMake target because otherwise there will be a name clash. rdar://124913332
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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