Package com.dylibso.chicory.runtime

Class ByteArrayMemory

java.lang.Object

com.dylibso.chicory.runtime.ByteArrayMemory

All Implemented Interfaces:

Memory

public final class ByteArrayMemory
extends Object
implements Memory

Represents the linear memory in the Wasm program. Can be shared reference b/w the host and the guest. try-catch is faster than explicit checks and can be optimized by the JVM. Catching generic RuntimeException to keep the method bodies short and easily inlinable.

Field Summary

Fields inherited from interface com.dylibso.chicory.runtime.Memory

PAGE_SIZE, RUNTIME_MAX_PAGES

Constructor Summary

Constructors

Constructor	Description
ByteArrayMemory(MemoryLimits limits)
ByteArrayMemory(MemoryLimits limits, MemAllocStrategy allocStrategy)

Method Summary

Modifier and Type	Method	Description
void	drop(int segment)
void	fill(byte value, int fromIndex, int toIndex)
int	grow(int size)
void	initialize(Instance instance, DataSegment[] dataSegments)
int	initialPages()
void	initPassiveSegment(int segmentId, int dest, int offset, int size)
int	maximumPages()
int	pages()	Gets the size of the memory in number of pages
byte	read(int addr)
byte[]	readBytes(int addr, int len)
double	readDouble(int addr)
long	readF32(int addr)
long	readF64(int addr)
float	readFloat(int addr)
int	readInt(int addr)
long	readLong(int addr)
short	readShort(int addr)
long	readU16(int addr)
void	write(int addr, byte[] data, int offset, int size)
void	writeByte(int addr, byte data)
void	writeF32(int addr, float data)
void	writeF64(int addr, double data)
void	writeI32(int addr, int data)
void	writeLong(int addr, long data)
void	writeShort(int addr, short data)
void	zero()

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.dylibso.chicory.runtime.Memory

copy, readCString, readCString, readI16, readI32, readI64, readI8, readString, readString, readU32, readU8, write, writeCString, writeCString, writeString, writeString

Constructor Details

ByteArrayMemory

public ByteArrayMemory(MemoryLimits limits)

ByteArrayMemory

public ByteArrayMemory(MemoryLimits limits,
 MemAllocStrategy allocStrategy)

Method Details

pages

public int pages()

Gets the size of the memory in number of pages

Specified by:

pages in interface Memory

grow

public int grow(int size)

Specified by:

grow in interface Memory

initialPages

public int initialPages()

Specified by:

initialPages in interface Memory

maximumPages

public int maximumPages()

Specified by:

maximumPages in interface Memory

initialize

public void initialize(Instance instance,
 DataSegment[] dataSegments)

Specified by:

initialize in interface Memory

initPassiveSegment

public void initPassiveSegment(int segmentId,
 int dest,
 int offset,
 int size)

Specified by:

initPassiveSegment in interface Memory

write

public void write(int addr,
 byte[] data,
 int offset,
 int size)

Specified by:

write in interface Memory

read

public byte read(int addr)

Specified by:

read in interface Memory

readBytes

public byte[] readBytes(int addr,
 int len)

Specified by:

readBytes in interface Memory

writeI32

public void writeI32(int addr,
 int data)

Specified by:

writeI32 in interface Memory

readInt

public int readInt(int addr)

Specified by:

readInt in interface Memory

writeLong

public void writeLong(int addr,
 long data)

Specified by:

writeLong in interface Memory

readLong

public long readLong(int addr)

Specified by:

readLong in interface Memory

writeShort

public void writeShort(int addr,
 short data)

Specified by:

writeShort in interface Memory

readShort

public short readShort(int addr)

Specified by:

readShort in interface Memory

readU16

public long readU16(int addr)

Specified by:

readU16 in interface Memory

writeByte

public void writeByte(int addr,
 byte data)

Specified by:

writeByte in interface Memory

writeF32

public void writeF32(int addr,
 float data)

Specified by:

writeF32 in interface Memory

readF32

public long readF32(int addr)

Specified by:

readF32 in interface Memory

readFloat

public float readFloat(int addr)

Specified by:

readFloat in interface Memory

writeF64

public void writeF64(int addr,
 double data)

Specified by:

writeF64 in interface Memory

readDouble

public double readDouble(int addr)

Specified by:

readDouble in interface Memory

readF64

public long readF64(int addr)

Specified by:

readF64 in interface Memory

zero

public void zero()

Specified by:

zero in interface Memory

fill

public void fill(byte value,
 int fromIndex,
 int toIndex)

Specified by:

fill in interface Memory

drop

public void drop(int segment)

Specified by:

drop in interface Memory