private void UnlockFile(long offset, long count)
{
#if !SILICONSTUDIO_PLATFORM_WINDOWS_RUNTIME && !SILICONSTUDIO_PLATFORM_MONO_MOBILE
var fileStream = stream as FileStream;
if (fileStream == null)
{
return;
}
#if SILICONSTUDIO_PLATFORM_WINDOWS_DESKTOP
var countLow = (uint)count;
var countHigh = (uint)(count >> 32);
var overlapped = new NativeLockFile.OVERLAPPED()
{
internalLow = 0,
internalHigh = 0,
offsetLow = (uint)offset,
offsetHigh = (uint)(offset >> 32),
hEvent = IntPtr.Zero,
};
if (!NativeLockFile.UnlockFileEx(fileStream.SafeFileHandle, 0, countLow, countHigh, ref overlapped))
{
throw new IOException("Couldn't unlock file.");
}
#else
fileStream.Unlock(offset, count);
#endif
#endif
}
private void LockFile(long offset, long count, bool exclusive)
{
#if !SILICONSTUDIO_PLATFORM_WINDOWS_RUNTIME
var fileStream = stream as FileStream;
if (fileStream == null)
{
return;
}
#if SILICONSTUDIO_PLATFORM_ANDROID
// Android does not support large file and thus is limited to files
// whose sizes are less than 2GB.
// We substract the offset to not go beyond the 2GB limit.
count = (count + offset > int.MaxValue) ? int.MaxValue - offset: count;
#endif
#if SILICONSTUDIO_PLATFORM_WINDOWS_DESKTOP
var countLow = (uint)count;
var countHigh = (uint)(count >> 32);
var overlapped = new NativeLockFile.OVERLAPPED()
{
internalLow = 0,
internalHigh = 0,
offsetLow = (uint)offset,
offsetHigh = (uint)(offset >> 32),
hEvent = IntPtr.Zero,
};
if (!NativeLockFile.LockFileEx(fileStream.SafeFileHandle, exclusive ? NativeLockFile.LOCKFILE_EXCLUSIVE_LOCK : 0, 0, countLow, countHigh, ref overlapped))
{
throw new IOException("Couldn't lock file.");
}
#elif SILICONSTUDIO_RUNTIME_CORECLR
// There is no implementation of FileStream.Lock on CoreCLR
#else
bool tryAgain;
do
{
tryAgain = false;
try
{
fileStream.Lock(offset, count);
}
catch (IOException)
{
tryAgain = true;
}
} while (tryAgain);
#endif
#endif
}
private void LockFile(long offset, long count, bool exclusive)
{
#if !SILICONSTUDIO_PLATFORM_WINDOWS_RUNTIME && !SILICONSTUDIO_PLATFORM_MONO_MOBILE
var fileStream = stream as FileStream;
if (fileStream == null)
{
return;
}
#if SILICONSTUDIO_PLATFORM_WINDOWS_DESKTOP
var countLow = (uint)count;
var countHigh = (uint)(count >> 32);
var overlapped = new NativeLockFile.OVERLAPPED()
{
internalLow = 0,
internalHigh = 0,
offsetLow = (uint)offset,
offsetHigh = (uint)(offset >> 32),
hEvent = IntPtr.Zero,
};
if (!NativeLockFile.LockFileEx(fileStream.SafeFileHandle, exclusive ? NativeLockFile.LOCKFILE_EXCLUSIVE_LOCK : 0, 0, countLow, countHigh, ref overlapped))
{
throw new IOException("Couldn't lock file.");
}
#elif SILICONSTUDIO_RUNTIME_CORECLR
// There is no implementation of FileStream.Lock on CoreCLR
#else
bool tryAgain;
do
{
tryAgain = false;
try
{
fileStream.Lock(offset, count);
}
catch (IOException)
{
tryAgain = true;
}
} while (tryAgain);
#endif
#endif
}
private void UnlockFile(long offset, long count)
{
#if !SILICONSTUDIO_PLATFORM_WINDOWS_RUNTIME
var fileStream = stream as FileStream;
if (fileStream == null)
{
return;
}
#if SILICONSTUDIO_PLATFORM_ANDROID
// See comment on `LockFile`.
count = (count + offset > int.MaxValue) ? int.MaxValue - offset: count;
#endif
#if SILICONSTUDIO_PLATFORM_WINDOWS_DESKTOP
var countLow = (uint)count;
var countHigh = (uint)(count >> 32);
var overlapped = new NativeLockFile.OVERLAPPED()
{
internalLow = 0,
internalHigh = 0,
offsetLow = (uint)offset,
offsetHigh = (uint)(offset >> 32),
hEvent = IntPtr.Zero,
};
if (!NativeLockFile.UnlockFileEx(fileStream.SafeFileHandle, 0, countLow, countHigh, ref overlapped))
{
throw new IOException("Couldn't unlock file.");
}
#elif SILICONSTUDIO_RUNTIME_CORECLR
// There is no implementation of FileStream.Unlock on CoreCLR
#else
fileStream.Unlock(offset, count);
#endif
#endif
}
