internal static ReadOnlyMemoryMappedViewByteBuffer Copy(MemoryMappedViewByteBuffer other, int markOfOther)
{
return(new ReadOnlyMemoryMappedViewByteBuffer(other.accessor, other.Capacity, other.offset)
{
limit = other.Limit,
position = other.Position,
mark = markOfOther,
Order = other.Order
});
}
public void TestFlush()
{
long fileSize = Random.Next(3 * 1024 * 1024);
int cut = Random.Next((int)fileSize);
var file = new FileInfo(Path.GetTempFileName());
using (FileStream raf = new FileStream(file.FullName, FileMode.Open, FileAccess.ReadWrite))
using (var fc = MemoryMappedFile.CreateFromFile(raf, null, fileSize, MemoryMappedFileAccess.ReadWrite,
#if FEATURE_MEMORYMAPPEDFILESECURITY
null,
#endif
HandleInheritability.None, false))
{
MemoryMappedViewByteBuffer mbb = fc.CreateViewByteBuffer(cut, fileSize - cut, MemoryMappedFileAccess.ReadWrite);
mbb.Flush();
}
// improve chance that mapped buffer will be unmapped
GC.Collect();
DeleteFile(file);
}
public void TestZeroMap()
{
long fileSize = Random.Next(1024 * 1024);
int cut = Random.Next((int)fileSize);
var file = new FileInfo(Path.GetTempFileName());
using (FileStream raf = new FileStream(file.FullName, FileMode.Open, FileAccess.ReadWrite))
using (var fc = MemoryMappedFile.CreateFromFile(raf, null, fileSize, MemoryMappedFileAccess.ReadWrite,
#if !NETSTANDARD
null,
#endif
HandleInheritability.None, false))
{
MemoryMappedViewByteBuffer mbb = fc.CreateViewByteBuffer(cut, 0, MemoryMappedFileAccess.ReadWrite);
mbb.Flush();
}
// improve chance that mapped buffer will be unmapped
GC.Collect();
Thread.Sleep(500);
DeleteFile(file);
}
public void TestZeroMap() //"Awaits fix: https://github.com/xamarin/xamarin-android/issues/5423"
{
long fileSize = Random.Next(1024 * 1024);
int cut = Random.Next((int)fileSize);
var file = new FileInfo(Path.GetTempFileName());
using (FileStream raf = new FileStream(file.FullName, FileMode.Open, FileAccess.ReadWrite))
using (var fc = MemoryMappedFile.CreateFromFile(raf, null, fileSize, MemoryMappedFileAccess.ReadWrite,
#if FEATURE_MEMORYMAPPEDFILESECURITY
null,
#endif
HandleInheritability.None, false))
{
MemoryMappedViewByteBuffer mbb = fc.CreateViewByteBuffer(cut, 0, MemoryMappedFileAccess.ReadWrite);
mbb.Flush();
}
// improve chance that mapped buffer will be unmapped
GC.Collect();
Thread.Sleep(500);
DeleteFile(file);
}
public void Test_Flush()
{
MemoryMappedViewByteBuffer mmbRead;
// buffer was not mapped in read/write mode
using (FileStream fileInputStream = new FileStream(tmpFile.FullName, FileMode.Open, FileAccess.Read))
{
using (var fileChannelRead = MemoryMappedFile.CreateFromFile(fileInputStream, null, 0, MemoryMappedFileAccess.Read,
#if FEATURE_MEMORYMAPPEDFILESECURITY
null,
#endif
HandleInheritability.None, true))
{
//FileChannel fileChannelRead = fileInputStream.getChannel();
//MappedByteBuffer mmbRead = fileChannelRead.map(MapMode.READ_ONLY, 0,
// fileChannelRead.size());
mmbRead = fileChannelRead.CreateViewByteBuffer(0, (int)fileInputStream.Length, MemoryMappedFileAccess.Read);
mmbRead.Flush();
}
//using (FileStream inputStream = new FileStream(tmpFile.FullName, FileMode.Open, FileAccess.Read))
using (var fileChannelR = MemoryMappedFile.CreateFromFile(fileInputStream, null, 0, MemoryMappedFileAccess.Read,
#if FEATURE_MEMORYMAPPEDFILESECURITY
null,
#endif
HandleInheritability.None, false))
{
//FileInputStream inputStream = new FileInputStream(tmpFile);
//FileChannel fileChannelR = inputStream.getChannel();
//MappedByteBuffer resultRead = fileChannelR.map(MapMode.READ_ONLY, 0,
// fileChannelR.size());
MemoryMappedViewByteBuffer resultRead = fileChannelR.CreateViewByteBuffer(0, (int)fileInputStream.Length, MemoryMappedFileAccess.Read);
//If this buffer was not mapped in read/write mode, then invoking this method has no effect.
assertEquals(
"Invoking force() should have no effect when this buffer was not mapped in read/write mode",
mmbRead, resultRead);
}
}
MemoryMappedViewByteBuffer mmbReadWrite;
// Buffer was mapped in read/write mode
using (FileStream randomFile = new FileStream(tmpFile.FullName, FileMode.Open, FileAccess.ReadWrite))
{
using (var fileChannelReadWrite = MemoryMappedFile.CreateFromFile(randomFile, null, 0, MemoryMappedFileAccess.ReadWrite,
#if FEATURE_MEMORYMAPPEDFILESECURITY
null,
#endif
HandleInheritability.None, true))
{
//RandomAccessFile randomFile = new RandomAccessFile(tmpFile, "rw");
//FileChannel fileChannelReadWrite = randomFile.getChannel();
//MappedByteBuffer mmbReadWrite = fileChannelReadWrite.map(
// FileChannel.MapMode.READ_WRITE, 0, fileChannelReadWrite.size());
mmbReadWrite = fileChannelReadWrite.CreateViewByteBuffer(0, (int)randomFile.Length, MemoryMappedFileAccess.ReadWrite);
mmbReadWrite.Put((byte)'o');
mmbReadWrite.Flush();
}
//using (FileStream random = new FileStream(tmpFile.FullName, FileMode.Open, FileAccess.ReadWrite))
using (var fileChannelRW = MemoryMappedFile.CreateFromFile(randomFile, null, 0, MemoryMappedFileAccess.ReadWrite,
#if FEATURE_MEMORYMAPPEDFILESECURITY
null,
#endif
HandleInheritability.None, false))
{
//RandomAccessFile random = new RandomAccessFile(tmpFile, "rw");
//FileChannel fileChannelRW = random.getChannel();
//MappedByteBuffer resultReadWrite = fileChannelRW.map(
// FileChannel.MapMode.READ_WRITE, 0, fileChannelRW.size());
MemoryMappedViewByteBuffer resultReadWrite = fileChannelRW.CreateViewByteBuffer(0, (int)randomFile.Length, MemoryMappedFileAccess.ReadWrite);
// Invoking force() will change the buffer
assertFalse(mmbReadWrite.Equals(resultReadWrite));
}
}
//fileChannelRead.close();
//fileChannelR.close();
//fileChannelReadWrite.close();
//fileChannelRW.close();
//}
}