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author | Matt A. Tobin <email@mattatobin.com> | 2021-11-14 01:30:12 -0500 |
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committer | Matt A. Tobin <email@mattatobin.com> | 2021-11-14 01:30:12 -0500 |
commit | 43fa0a71c814e902165782680f2f9705e3c234c9 (patch) | |
tree | 0ab3c66e8432febc00c18c036706c7ff43c11799 /components/profile/src/nsProfileLock.h | |
parent | 2fccdffac3075ee72087f9ee153204b02c7d931a (diff) | |
download | aura-central-43fa0a71c814e902165782680f2f9705e3c234c9.tar.gz |
Issue %3005 - Move toolkit/components to components/
Diffstat (limited to 'components/profile/src/nsProfileLock.h')
-rw-r--r-- | components/profile/src/nsProfileLock.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/components/profile/src/nsProfileLock.h b/components/profile/src/nsProfileLock.h new file mode 100644 index 000000000..e78a3577e --- /dev/null +++ b/components/profile/src/nsProfileLock.h @@ -0,0 +1,95 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef __nsProfileLock_h___ +#define __nsProfileLock_h___ + +#include "nsIFile.h" + +class nsIProfileUnlocker; + +#if defined (XP_WIN) +#include <windows.h> +#endif + +#if defined (XP_UNIX) +#include <signal.h> +#include "prclist.h" +#endif + +class nsProfileLock +#if defined (XP_UNIX) + : public PRCList +#endif +{ +public: + nsProfileLock(); + nsProfileLock(nsProfileLock& src); + + ~nsProfileLock(); + + nsProfileLock& operator=(nsProfileLock& rhs); + + /** + * Attempt to lock a profile directory. + * + * @param aProfileDir [in] The profile directory to lock. + * @param aUnlocker [out] Optional. This is only returned when locking + * fails with NS_ERROR_FILE_ACCESS_DENIED, and may not + * be returned at all. + * @throws NS_ERROR_FILE_ACCESS_DENIED if the profile is locked. + */ + nsresult Lock(nsIFile* aProfileDir, nsIProfileUnlocker* *aUnlocker); + + /** + * Unlock a profile directory. If you're unlocking the directory because + * the application is in the process of shutting down because of a fatal + * signal, set aFatalSignal to true. + */ + nsresult Unlock(bool aFatalSignal = false); + + /** + * Get the modification time of a replaced profile lock, otherwise 0. + */ + nsresult GetReplacedLockTime(PRTime* aResult); + +private: + bool mHaveLock; + PRTime mReplacedLockTime; + +#if defined (XP_WIN) + HANDLE mLockFileHandle; +#elif defined (XP_UNIX) + + struct RemovePidLockFilesExiting { + RemovePidLockFilesExiting() {} + ~RemovePidLockFilesExiting() { + RemovePidLockFiles(false); + } + }; + + static void RemovePidLockFiles(bool aFatalSignal); + static void FatalSignalHandler(int signo +#ifdef SA_SIGINFO + , siginfo_t *info, void *context +#endif + ); + static PRCList mPidLockList; + + nsresult LockWithFcntl(nsIFile *aLockFile); + + /** + * @param aHaveFcntlLock if true, we've already acquired an fcntl lock so this + * lock is merely an "obsolete" lock to keep out old Firefoxes + */ + nsresult LockWithSymlink(nsIFile *aLockFile, bool aHaveFcntlLock); + + char* mPidLockFileName; + int mLockFileDesc; +#endif + +}; + +#endif /* __nsProfileLock_h___ */ |