Package org.gnome.gmodule

Class Module

java.lang.Object

org.javagi.base.ProxyInstance

org.gnome.gmodule.Module

All Implemented Interfaces:

Proxy

@Generated("io.github.jwharm.JavaGI")
public class Module
extends ProxyInstance

The GModule struct is an opaque data structure to represent a dynamically-loaded module. It should only be accessed via the following functions.

To ensure correct lock ordering, these functions must not be called from global constructors (for example, those using GCC’s __attribute__((constructor)) attribute).

Constructor Summary

Constructors

Constructor	Description
Module(MemorySegment address)	Create a Module proxy instance for the provided memory address.

Method Summary

Modifier and Type	Method	Description
static String	buildPath(@Nullable String directory, String moduleName)	Deprecated. Use g_module_open() instead with moduleName as the basename of the file_name argument.
boolean	close()	Closes a module.
static String	error()	Gets a string describing the last module error.
static Quark	errorQuark()
void	makeResident()	Ensures that a module will never be unloaded.
String	name()	Returns the filename that the module was opened with.
static Module	open(@Nullable String fileName, Set<ModuleFlags> flags)	A thin wrapper function around g_module_open_full()
static Module	open(@Nullable String fileName, ModuleFlags... flags)	A thin wrapper function around g_module_open_full()
static Module	openFull(@Nullable String fileName, Set<ModuleFlags> flags)	Opens a module.
static Module	openFull(@Nullable String fileName, ModuleFlags... flags)	Opens a module.
static boolean	supported()	Checks if modules are supported on the current platform.
boolean	symbol(String symbolName, @Nullable Out<MemorySegment> symbol)	Gets a symbol pointer from a module, such as one exported by G_MODULE_EXPORT.

Methods inherited from class org.javagi.base.ProxyInstance

equals, handle, hashCode

Methods inherited from class java.lang.Object

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

Constructor Details

Module

public Module(MemorySegment address)

Create a Module proxy instance for the provided memory address.

Parameters:

address - the memory address of the native object

Method Details

buildPath

@Deprecated
public static String buildPath(@Nullable String directory,
 String moduleName)

Deprecated.

Use g_module_open() instead with moduleName as the basename of the file_name argument. See G_MODULE_SUFFIX for why.

A portable way to build the filename of a module. The platform-specific prefix and suffix are added to the filename, if needed, and the result is added to the directory, using the correct separator character.

The directory should specify the directory where the module can be found. It can be null or an empty string to indicate that the module is in a standard platform-specific directory, though this is not recommended since the wrong module may be found.

For example, calling g_module_build_path() on a Linux system with a directory of /lib and a moduleName of "mylibrary" will return /lib/libmylibrary.so. On a Windows system, using \\Windows as the directory it will return \\Windows\\mylibrary.dll.

Parameters:

directory - the directory where the module is. This can be null or the empty string to indicate that the standard platform-specific directories will be used, though that is not recommended

moduleName - the name of the module

Returns:

the complete path of the module, including the standard library prefix and suffix. This should be freed when no longer needed

error

public static String error()

Gets a string describing the last module error.

Returns:

a string describing the last module error

errorQuark

public static Quark errorQuark()

open

public static Module open(@Nullable String fileName,
 Set<ModuleFlags> flags)

A thin wrapper function around g_module_open_full()

Parameters:

fileName - the name or path to the file containing the module, or null to obtain a GModule representing the main program itself

flags - the flags used for opening the module. This can be the logical OR of any of the GModuleFlags.

Returns:

a GModule on success, or null on failure

open

public static Module open(@Nullable String fileName,
 ModuleFlags... flags)

A thin wrapper function around g_module_open_full()

Parameters:

fileName - the name or path to the file containing the module, or null to obtain a GModule representing the main program itself

flags - the flags used for opening the module. This can be the logical OR of any of the GModuleFlags.

Returns:

a GModule on success, or null on failure

openFull

public static Module openFull(@Nullable String fileName,
 Set<ModuleFlags> flags)
                       throws GErrorException

Opens a module. If the module has already been opened, its reference count is incremented. If not, the module is searched using fileName.

Since 2.76, the search order/behavior is as follows:

1. If fileName exists as a regular file, it is used as-is; else 2. If fileName doesn't have the correct suffix and/or prefix for the platform, then possible suffixes and prefixes will be added to the basename till a file is found and whatever is found will be used; else 3. If fileName doesn't have the ".la"-suffix, ".la" is appended. Either way, if a matching .la file exists (and is a libtool archive) the libtool archive is parsed to find the actual file name, and that is used.

If, at the end of all this, we have a file path that we can access on disk, it is opened as a module. If not, fileName is attempted to be opened as a module verbatim in the hopes that the system implementation will somehow be able to access it. If that is not possible, null is returned.

Note that this behaviour was different prior to 2.76, but there is some overlap in functionality. If backwards compatibility is an issue, kindly consult earlier GModule documentation for the prior search order/behavior of fileName.

Parameters:

fileName - the name or path to the file containing the module, or null to obtain a GModule representing the main program itself

flags - the flags used for opening the module. This can be the logical OR of any of the GModuleFlags

Returns:

a GModule on success, or null on failure

Throws:

GErrorException - see GError

Since:

2.70

openFull

public static Module openFull(@Nullable String fileName,
 ModuleFlags... flags)
                       throws GErrorException

Opens a module. If the module has already been opened, its reference count is incremented. If not, the module is searched using fileName.

Since 2.76, the search order/behavior is as follows:

1. If fileName exists as a regular file, it is used as-is; else 2. If fileName doesn't have the correct suffix and/or prefix for the platform, then possible suffixes and prefixes will be added to the basename till a file is found and whatever is found will be used; else 3. If fileName doesn't have the ".la"-suffix, ".la" is appended. Either way, if a matching .la file exists (and is a libtool archive) the libtool archive is parsed to find the actual file name, and that is used.

If, at the end of all this, we have a file path that we can access on disk, it is opened as a module. If not, fileName is attempted to be opened as a module verbatim in the hopes that the system implementation will somehow be able to access it. If that is not possible, null is returned.

Note that this behaviour was different prior to 2.76, but there is some overlap in functionality. If backwards compatibility is an issue, kindly consult earlier GModule documentation for the prior search order/behavior of fileName.

Parameters:

fileName - the name or path to the file containing the module, or null to obtain a GModule representing the main program itself

flags - the flags used for opening the module. This can be the logical OR of any of the GModuleFlags

Returns:

a GModule on success, or null on failure

Throws:

GErrorException - see GError

Since:

2.70

supported

public static boolean supported()

Checks if modules are supported on the current platform.

Returns:

true if modules are supported

close

public boolean close()

Closes a module.

Returns:

true on success

makeResident

public void makeResident()

Ensures that a module will never be unloaded. Any future g_module_close() calls on the module will be ignored.

name

public String name()

Returns the filename that the module was opened with.

If this Module refers to the application itself, "main" is returned.

Returns:

the filename of the module

symbol

public boolean symbol(String symbolName,
 @Nullable Out<MemorySegment> symbol)

Gets a symbol pointer from a module, such as one exported by G_MODULE_EXPORT. Note that a valid symbol can be null.

Parameters:

symbolName - the name of the symbol to find

symbol - returns the pointer to the symbol value

Returns:

true on success