97841dad2b
Convert the StringToInt helper into a StringToLong helper with a 'long' result type. This will make the helper more useful to other callers that want to use strtol. While at it, also check errno after calling strtol in case the conversion fails with a range error.
127 lines
2.8 KiB
C++
127 lines
2.8 KiB
C++
/*============================================================================
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CMake - Cross Platform Makefile Generator
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Copyright 2014 Ruslan Baratov
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Distributed under the OSI-approved BSD License (the "License");
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see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the License for more information.
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============================================================================*/
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#include "cmFileLock.h"
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#include <windows.h> // CreateFileW
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#include "cmSystemTools.h"
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cmFileLock::cmFileLock(): File(INVALID_HANDLE_VALUE)
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{
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}
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cmFileLockResult cmFileLock::Release()
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{
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if (this->Filename.empty())
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{
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return cmFileLockResult::MakeOk();
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}
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const unsigned long len = static_cast<unsigned long>(-1);
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static OVERLAPPED overlapped;
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const DWORD reserved = 0;
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const BOOL unlockResult = UnlockFileEx(
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File,
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reserved,
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len,
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len,
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&overlapped
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);
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this->Filename = "";
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if (unlockResult)
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{
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return cmFileLockResult::MakeOk();
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}
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else
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{
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return cmFileLockResult::MakeSystem();
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}
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}
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cmFileLockResult cmFileLock::OpenFile()
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{
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const DWORD access = GENERIC_READ | GENERIC_WRITE;
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const DWORD shareMode = FILE_SHARE_READ | FILE_SHARE_WRITE;
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const PSECURITY_ATTRIBUTES security = NULL;
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const DWORD attr = 0;
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const HANDLE templ = NULL;
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this->File = CreateFileW(
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cmSystemTools::ConvertToWindowsExtendedPath(this->Filename).c_str(),
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access,
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shareMode,
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security,
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OPEN_EXISTING,
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attr,
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templ
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);
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if (this->File == INVALID_HANDLE_VALUE)
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{
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return cmFileLockResult::MakeSystem();
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}
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else
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{
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return cmFileLockResult::MakeOk();
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}
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}
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cmFileLockResult cmFileLock::LockWithoutTimeout()
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{
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if (!this->LockFile(LOCKFILE_EXCLUSIVE_LOCK))
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{
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return cmFileLockResult::MakeSystem();
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}
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else
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{
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return cmFileLockResult::MakeOk();
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}
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}
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cmFileLockResult cmFileLock::LockWithTimeout(unsigned long seconds)
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{
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const DWORD flags = LOCKFILE_EXCLUSIVE_LOCK | LOCKFILE_FAIL_IMMEDIATELY;
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while (true)
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{
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const BOOL result = this->LockFile(flags);
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if (result)
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{
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return cmFileLockResult::MakeOk();
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}
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const DWORD error = GetLastError();
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if (error != ERROR_LOCK_VIOLATION)
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{
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return cmFileLockResult::MakeSystem();
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}
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if (seconds == 0)
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{
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return cmFileLockResult::MakeTimeout();
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}
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--seconds;
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cmSystemTools::Delay(1000);
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}
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}
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BOOL cmFileLock::LockFile(DWORD flags)
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{
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const DWORD reserved = 0;
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const unsigned long len = static_cast<unsigned long>(-1);
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static OVERLAPPED overlapped;
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return LockFileEx(
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this->File,
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flags,
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reserved,
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len,
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len,
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&overlapped
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);
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}
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