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https://github.com/reactos/CMake.git
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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.
75 lines
1.9 KiB
C++
75 lines
1.9 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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#ifndef cmFileLock_h
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#define cmFileLock_h
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#include "cmStandardIncludes.h"
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#if defined(_WIN32)
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# include <windows.h> // HANDLE
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#endif
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class cmFileLockResult;
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/**
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* @brief Cross-platform file locking.
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* @details Under the hood this class use 'fcntl' for Unix-like platforms and
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* 'LockFileEx'/'UnlockFileEx' for Win32 platform. Locks are exclusive and
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* advisory.
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*/
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class cmFileLock
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{
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public:
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cmFileLock();
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~cmFileLock();
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/**
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* @brief Lock the file.
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* @param timeoutSec Lock timeout. If -1 try until success or fatal error.
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*/
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cmFileLockResult Lock(const std::string& filename, unsigned long timeoutSec);
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/**
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* @brief Unlock the file.
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*/
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cmFileLockResult Release();
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/**
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* @brief Check file is locked by this class.
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* @details This function helps to find double locks (deadlocks) and to do
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* explicit unlocks.
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*/
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bool IsLocked(const std::string& filename) const;
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private:
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cmFileLock(const cmFileLock&);
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cmFileLock& operator=(const cmFileLock&);
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cmFileLockResult OpenFile();
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cmFileLockResult LockWithoutTimeout();
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cmFileLockResult LockWithTimeout(unsigned long timeoutSec);
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#if defined(_WIN32)
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typedef HANDLE FileId;
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BOOL LockFile(DWORD flags);
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#else
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typedef int FileId;
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int LockFile(int cmd, int type);
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#endif
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FileId File;
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std::string Filename;
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};
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#endif // cmFileLock_h
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