Advapi32
, Carbon
, Cfgmgr32
, CoreDLL
, CoreFoundation
, Crypt32
, Cryptui
, Ddeml
, DiskArbitration
, Dxva2
, ExtAttr
, GDI32
, IOKit
, IPHlpAPI
, Kernel32
, Kstat2
, LibC
, LibC
, LibKstat
, LibRT
, MacFileUtils.FileManager
, Mpr
, Msi
, Netapi32
, NtDll
, Ole32
, OleAuto
, OpenGL32
, Pdh
, Perfstat
, PowrProf
, Psapi
, Rasapi32
, Secur32
, SetupApi
, Shell32
, ShellAPI
, Shlwapi
, StdCallLibrary
, SystemB
, Udev
, User32
, Version
, W32APIOptions
, Wevtapi
, Wininet
, Winsock2
, Winspool
, Wtsapi32
, X11
, X11.Xevie
, X11.Xext
, X11.Xrender
, X11.XTest
, XAttr
, XAttr
AccCtrl
public interface Library
Derive from this interface for all native library definitions. Define an instance of your library like this:
MyNativeLibrary INSTANCE = (MyNativeLibrary)
Native.load("mylib", MyNativeLibrary.class);
By convention, method names are identical to the native names, although you can map java names to different native names by providing a FunctionMapper
as a value for key OPTION_FUNCTION_MAPPER
in the options map passed to the Native.load(String, Class, Map)
call.
Although the names for structures and structure fields may be chosen arbitrarily, they should correspond as closely as possible to the native definitions. The same is true for parameter names.
This interface supports multiple, concurrent invocations of any library methods on the Java side. Check your library documentation for its multi-threading requirements on the native side. If a library is not safe for simultaneous multi-threaded access, consider using Native.synchronizedLibrary(com.sun.jna.Library)
to prevent simultaneous multi-threaded access to the native code.
Optional fields
Interface options will be automatically propagated to structures defined within the library provided a call to Native.load(String,Class,Map)
is made prior to instantiating any of those structures. One common way of ensuring this is to declare an INSTANCE field in the interface which holds the load
result.
OPTIONS (an instance of Map
), TYPE_MAPPER (an instance of TypeMapper
), STRUCTURE_ALIGNMENT (one of the alignment types defined in Structure
), and STRING_ENCODING (a String
) may also be defined. If no instance of the interface has been instantiated, these fields will be used to determine customization settings for structures and methods defined within the interface.
Verschachtelte Klassen
Felder
Option key for a boolean flag to allow any Java class instance as a parameter.
Calling convention for the entire library.
Class loader to use when searching for native libraries on the resource path (classpath).
Option key for per-library String encoding.
Option key for structure alignment type (
Integer
), which should be one of the predefined alignment types in
Structure
.
Supports a custom symbol provider for the NativeLibrary (see
SymbolProvider
)
Option key for structure alignment type (
Integer
), which should be one of the predefined alignment types in
Structure
.
Option key for per-library String encoding. This affects conversions between Java unicode and native (const char*
) strings (as arguments or Structure fields).
Defaults to
Native.getDefaultStringEncoding()
.
Option key for a boolean flag to allow any Java class instance as a parameter. If no type mapper is found, the object is passed as a pointer. NOTE: This is for use with raw JNI interactions via the JNIEnv data structure.
Calling convention for the entire library.
Class loader to use when searching for native libraries on the resource path (classpath). If not provided the current thread's context class loader is used.
If extracted from the resource path (i.e. bundled in a jar file), the loaded library's lifespan will mirror that of the class loader, which means you can use the same library in isolated contexts without conflict.
Supports a custom symbol provider for the NativeLibrary (see
SymbolProvider
)
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