com.oracle.svm.core.posix

Class PosixRawFileOperationSupport

java.lang.Object

com.oracle.svm.core.os.AbstractRawFileOperationSupport

com.oracle.svm.core.posix.PosixRawFileOperationSupport

All Implemented Interfaces:

RawFileOperationSupport

public class PosixRawFileOperationSupport
extends AbstractRawFileOperationSupport

Nested Class Summary

Nested classes/interfaces inherited from class com.oracle.svm.core.os.AbstractRawFileOperationSupport

AbstractRawFileOperationSupport.RawFileOperationSupportHolder

Nested classes/interfaces inherited from interface com.oracle.svm.core.os.RawFileOperationSupport

RawFileOperationSupport.FileAccessMode, RawFileOperationSupport.RawFileDescriptor

Constructor Summary

Constructors

Constructor and Description
PosixRawFileOperationSupport(boolean useNativeByteOrder)

Method Summary

Modifier and Type	Method and Description
boolean	close(RawFileOperationSupport.RawFileDescriptor fd) Closes a file descriptor.
boolean	isValid(RawFileOperationSupport.RawFileDescriptor fd) Checks if a file descriptor is valid or if it represents an error value.
RawFileOperationSupport.RawFileDescriptor	open(File file, RawFileOperationSupport.FileAccessMode mode) Opens or creates a file with the specified access mode.
org.graalvm.word.SignedWord	position(RawFileOperationSupport.RawFileDescriptor fd) Gets the current file position within a file.
org.graalvm.word.SignedWord	read(RawFileOperationSupport.RawFileDescriptor fd, org.graalvm.word.Pointer buffer, org.graalvm.word.UnsignedWord bufferSize) Reads up to bufferSize bytes of data from to the current file position and advances the file position.
boolean	seek(RawFileOperationSupport.RawFileDescriptor fd, org.graalvm.word.SignedWord position) Sets the current file position within a file.
org.graalvm.word.SignedWord	size(RawFileOperationSupport.RawFileDescriptor fd) Returns the size of a file.
boolean	write(RawFileOperationSupport.RawFileDescriptor fd, org.graalvm.word.Pointer data, org.graalvm.word.UnsignedWord size) Writes data to the current file position and advances the file position.

Methods inherited from class com.oracle.svm.core.os.AbstractRawFileOperationSupport

open, write, writeBoolean, writeByte, writeChar, writeInt, writeLong, writeShort

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.oracle.svm.core.os.RawFileOperationSupport

bigEndian, littleEndian, nativeByteOrder

Constructor Detail

PosixRawFileOperationSupport

public PosixRawFileOperationSupport(boolean useNativeByteOrder)

Method Detail

open

public RawFileOperationSupport.RawFileDescriptor open(File file,
                                                      RawFileOperationSupport.FileAccessMode mode)

Description copied from interface: RawFileOperationSupport

Opens or creates a file with the specified access mode.

Returns:

If the operation is successful, it returns the file descriptor. Otherwise, it returns a value where RawFileOperationSupport.isValid(com.oracle.svm.core.os.RawFileOperationSupport.RawFileDescriptor) will return false.

isValid

public boolean isValid(RawFileOperationSupport.RawFileDescriptor fd)

Description copied from interface: RawFileOperationSupport

Checks if a file descriptor is valid or if it represents an error value.

Returns:

true if the file descriptor is valid, false otherwise.

close

public boolean close(RawFileOperationSupport.RawFileDescriptor fd)

Description copied from interface: RawFileOperationSupport

Closes a file descriptor.

Returns:

true if the file descriptor was closed by the call, false otherwise.

size

public org.graalvm.word.SignedWord size(RawFileOperationSupport.RawFileDescriptor fd)

Description copied from interface: RawFileOperationSupport

Returns the size of a file.

Returns:

If the operation is successful, it returns the size of the file. Otherwise, it returns a value less than 0.

position

public org.graalvm.word.SignedWord position(RawFileOperationSupport.RawFileDescriptor fd)

Description copied from interface: RawFileOperationSupport

Gets the current file position within a file.

Returns:

If the operation is successful, it returns the current file position. Otherwise, it returns a value less than 0.

seek

public boolean seek(RawFileOperationSupport.RawFileDescriptor fd,
                    org.graalvm.word.SignedWord position)

Description copied from interface: RawFileOperationSupport

Sets the current file position within a file.

Returns:

true if the file position was updated to the given value, false otherwise.

write

public boolean write(RawFileOperationSupport.RawFileDescriptor fd,
                     org.graalvm.word.Pointer data,
                     org.graalvm.word.UnsignedWord size)

Description copied from interface: RawFileOperationSupport

Writes data to the current file position and advances the file position.

Returns:

true if the data was written, false otherwise.

read

public org.graalvm.word.SignedWord read(RawFileOperationSupport.RawFileDescriptor fd,
                                        org.graalvm.word.Pointer buffer,
                                        org.graalvm.word.UnsignedWord bufferSize)

Description copied from interface: RawFileOperationSupport

Reads up to bufferSize bytes of data from to the current file position and advances the file position.

Returns:

If the operation is successful, it returns the number of read bytes. Otherwise, it returns a negative value.