| Commit message (Collapse) | Author | Age | Files | Lines |
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A "sharing violation" happens when trying to delete the lock file and another
thread/process is reading it at that very moment. Detect the error and try again,
up to 10000 times - to avoid an infinite loop if QFile::remove fails for another
reason such as a sudden change of permissions preventing us from deleting our
own lock file.
On Unix the deletion can't fail because of readers, but it doesn't hurt
to check the return value there too, to catch other reasons for failures
such as a sudden permission change.
Task-number: QTBUG-38853
Change-Id: Icf12a74faed4a4916e3427abc09d9c33aa141476
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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This is necessary to avoid hidden dependencies for int gethostname(char *name,
size_t namelen);
This was revelead while backporting the class to Qt 4 for QtSerialPort.
Change-Id: I1c477d295eeae90b3136fc6aae5d45982d5b1d73
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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This avoids one extra memory allocation when creating the lock file. The
number of memory allocations when checking the file are still the same.
Change-Id: I16a2fdb7a5458bdc66f8ad1c602582b5698a5b5c
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Kevin Ottens <kevin.ottens@kdab.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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QStringBuilder will precalculate the size of the string for us, which
avoids extra realloc() and moving data around.
Change-Id: I4e31964bb9bfffbe2083b3cb8c120e602160dfd8
Reviewed-by: David Faure <david.faure@kdab.com>
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Reviewed-by: Kevin Ottens <kevin.ottens@kdab.com>
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Trying to do as few operations as possible once the file got opened.
That includes generating the data which will go in the file. Indeed if
we crashed at that point the lock file is already emptied. Could happen
because of the qAppName call. It's then safer to prepare the data
upfront, and just open/write/close if possible.
Change-Id: Iad32fa822c6a5958ae89d84a2fe02ed5366ea278
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
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flock isn't available but we use fcnlt already (which is the recommended
alternative on Solaris)
Change-Id: I718e59c4804950a26eeb610888e17ce666522dcc
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Change-Id: Ida2f59bb245ef70bf65f7e8944c4c315d5bc2f81
Reviewed-by: David Faure (KDE) <faure@kde.org>
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
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Locking between processes, implemented with open(O_EXCL) on Unix
and CreateFile(CREATE_NEW) on Windows.
Supports detecting stale lock files and deleting them.
Advisory locking is used to prevent deletion of files that are still in use.
Change-Id: Id00ee2a4e77a29483d869037c7047c59cb909339
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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