97206d5727
This renames the LLDB error class to Status, as discussed on the lldb-dev mailing list. A change of this magnitude cannot easily be done without find and replace, but that has potential to catch unwanted occurrences of common strings such as "Error". Every effort was made to find all the obvious things such as the word "Error" appearing in a string, etc, but it's possible there are still some lingering occurences left around. Hopefully nothing too serious. llvm-svn: 302872
80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
//===-- LockFileWindows.cpp -------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Host/windows/LockFileWindows.h"
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#include <io.h>
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using namespace lldb;
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using namespace lldb_private;
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namespace {
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Status fileLock(HANDLE file_handle, DWORD flags, const uint64_t start,
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const uint64_t len) {
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if (start != 0)
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return Status("Non-zero start lock regions are not supported");
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OVERLAPPED overlapped = {};
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if (!::LockFileEx(file_handle, flags, 0, len, 0, &overlapped) &&
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::GetLastError() != ERROR_IO_PENDING)
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return Status(::GetLastError(), eErrorTypeWin32);
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DWORD bytes;
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if (!::GetOverlappedResult(file_handle, &overlapped, &bytes, TRUE))
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return Status(::GetLastError(), eErrorTypeWin32);
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return Status();
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}
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} // namespace
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LockFileWindows::LockFileWindows(int fd)
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: LockFileBase(fd), m_file(reinterpret_cast<HANDLE>(_get_osfhandle(fd))) {}
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LockFileWindows::~LockFileWindows() { Unlock(); }
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bool LockFileWindows::IsValidFile() const {
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return LockFileBase::IsValidFile() && m_file != INVALID_HANDLE_VALUE;
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}
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Status LockFileWindows::DoWriteLock(const uint64_t start, const uint64_t len) {
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return fileLock(m_file, LOCKFILE_EXCLUSIVE_LOCK, start, len);
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}
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Status LockFileWindows::DoTryWriteLock(const uint64_t start,
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const uint64_t len) {
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return fileLock(m_file, LOCKFILE_EXCLUSIVE_LOCK | LOCKFILE_FAIL_IMMEDIATELY,
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start, len);
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}
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Status LockFileWindows::DoReadLock(const uint64_t start, const uint64_t len) {
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return fileLock(m_file, 0, start, len);
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}
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Status LockFileWindows::DoTryReadLock(const uint64_t start,
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const uint64_t len) {
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return fileLock(m_file, LOCKFILE_FAIL_IMMEDIATELY, start, len);
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}
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Status LockFileWindows::DoUnlock() {
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OVERLAPPED overlapped = {};
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if (!::UnlockFileEx(m_file, 0, m_len, 0, &overlapped) &&
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::GetLastError() != ERROR_IO_PENDING)
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return Status(::GetLastError(), eErrorTypeWin32);
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DWORD bytes;
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if (!::GetOverlappedResult(m_file, &overlapped, &bytes, TRUE))
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return Status(::GetLastError(), eErrorTypeWin32);
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return Status();
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}
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