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comparison: profile/dirserviceprovider/src/nsProfileLock.h
profile/dirserviceprovider/src/nsProfileLock.h
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef __nsProfileLock_h___ | |
| 7 #define __nsProfileLock_h___ | |
| 8 | |
| 9 #include "nsIFile.h" | |
| 10 | |
| 11 class nsIProfileUnlocker; | |
| 12 | |
| 13 #if defined (XP_WIN) | |
| 14 #include <windows.h> | |
| 15 #endif | |
| 16 | |
| 17 #if defined (XP_UNIX) | |
| 18 #include <signal.h> | |
| 19 #include "prclist.h" | |
| 20 #endif | |
| 21 | |
| 22 class nsProfileLock | |
| 23 #if defined (XP_UNIX) | |
| 24 : public PRCList | |
| 25 #endif | |
| 26 { | |
| 27 public: | |
| 28 nsProfileLock(); | |
| 29 nsProfileLock(nsProfileLock& src); | |
| 30 | |
| 31 ~nsProfileLock(); | |
| 32 | |
| 33 nsProfileLock& operator=(nsProfileLock& rhs); | |
| 34 | |
| 35 /** | |
| 36 * Attempt to lock a profile directory. | |
| 37 * | |
| 38 * @param aProfileDir [in] The profile directory to lock. | |
| 39 * @param aUnlocker [out] Optional. This is only returned when locking | |
| 40 * fails with NS_ERROR_FILE_ACCESS_DENIED, and may not | |
| 41 * be returned at all. | |
| 42 * @throws NS_ERROR_FILE_ACCESS_DENIED if the profile is locked. | |
| 43 */ | |
| 44 nsresult Lock(nsIFile* aProfileDir, nsIProfileUnlocker* *aUnlocker); | |
| 45 | |
| 46 /** | |
| 47 * Unlock a profile directory. If you're unlocking the directory because | |
| 48 * the application is in the process of shutting down because of a fatal | |
| 49 * signal, set aFatalSignal to true. | |
| 50 */ | |
| 51 nsresult Unlock(bool aFatalSignal = false); | |
| 52 | |
| 53 /** | |
| 54 * Get the modification time of a replaced profile lock, otherwise 0. | |
| 55 */ | |
| 56 nsresult GetReplacedLockTime(PRTime* aResult); | |
| 57 | |
| 58 private: | |
| 59 bool mHaveLock; | |
| 60 PRTime mReplacedLockTime; | |
| 61 | |
| 62 #if defined (XP_WIN) | |
| 63 HANDLE mLockFileHandle; | |
| 64 #elif defined (XP_UNIX) | |
| 65 | |
| 66 struct RemovePidLockFilesExiting { | |
| 67 RemovePidLockFilesExiting() {} | |
| 68 ~RemovePidLockFilesExiting() { | |
| 69 RemovePidLockFiles(false); | |
| 70 } | |
| 71 }; | |
| 72 | |
| 73 static void RemovePidLockFiles(bool aFatalSignal); | |
| 74 static void FatalSignalHandler(int signo | |
| 75 #ifdef SA_SIGINFO | |
| 76 , siginfo_t *info, void *context | |
| 77 #endif | |
| 78 ); | |
| 79 static PRCList mPidLockList; | |
| 80 | |
| 81 nsresult LockWithFcntl(nsIFile *aLockFile); | |
| 82 | |
| 83 /** | |
| 84 * @param aHaveFcntlLock if true, we've already acquired an fcntl lock so this | |
| 85 * lock is merely an "obsolete" lock to keep out old Firefoxes | |
| 86 */ | |
| 87 nsresult LockWithSymlink(nsIFile *aLockFile, bool aHaveFcntlLock); | |
| 88 | |
| 89 char* mPidLockFileName; | |
| 90 int mLockFileDesc; | |
| 91 #endif | |
| 92 | |
| 93 }; | |
| 94 | |
| 95 #endif /* __nsProfileLock_h___ */ |
