96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __nsProfileLock_h___
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#define __nsProfileLock_h___
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#include "nsIFile.h"
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class nsIProfileUnlocker;
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#if defined (XP_WIN)
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#include <windows.h>
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#endif
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#if defined (XP_UNIX)
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#include <signal.h>
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#include "prclist.h"
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#endif
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class nsProfileLock
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#if defined (XP_UNIX)
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: public PRCList
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#endif
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{
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public:
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nsProfileLock();
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nsProfileLock(nsProfileLock& src);
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~nsProfileLock();
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nsProfileLock& operator=(nsProfileLock& rhs);
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/**
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* Attempt to lock a profile directory.
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*
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* @param aProfileDir [in] The profile directory to lock.
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* @param aUnlocker [out] Optional. This is only returned when locking
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* fails with NS_ERROR_FILE_ACCESS_DENIED, and may not
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* be returned at all.
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* @throws NS_ERROR_FILE_ACCESS_DENIED if the profile is locked.
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*/
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nsresult Lock(nsIFile* aProfileDir, nsIProfileUnlocker* *aUnlocker);
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/**
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* Unlock a profile directory. If you're unlocking the directory because
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* the application is in the process of shutting down because of a fatal
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* signal, set aFatalSignal to true.
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*/
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nsresult Unlock(bool aFatalSignal = false);
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/**
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* Get the modification time of a replaced profile lock, otherwise 0.
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*/
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nsresult GetReplacedLockTime(PRTime* aResult);
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private:
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bool mHaveLock;
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PRTime mReplacedLockTime;
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#if defined (XP_WIN)
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HANDLE mLockFileHandle;
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#elif defined (XP_UNIX)
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struct RemovePidLockFilesExiting {
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RemovePidLockFilesExiting() {}
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~RemovePidLockFilesExiting() {
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RemovePidLockFiles(false);
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}
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};
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static void RemovePidLockFiles(bool aFatalSignal);
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static void FatalSignalHandler(int signo
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#ifdef SA_SIGINFO
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, siginfo_t *info, void *context
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#endif
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);
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static PRCList mPidLockList;
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nsresult LockWithFcntl(nsIFile *aLockFile);
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/**
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* @param aHaveFcntlLock if true, we've already acquired an fcntl lock so this
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* lock is merely an "obsolete" lock to keep out old Firefoxes
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*/
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nsresult LockWithSymlink(nsIFile *aLockFile, bool aHaveFcntlLock);
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char* mPidLockFileName;
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int mLockFileDesc;
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#endif
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};
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#endif /* __nsProfileLock_h___ */
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