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PoC - Use Foreign Function & Memory API for GTK3 OS Support #1230

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PoC - Use Foreign Function & Memory API for GTK3 OS Support #1230

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2 changes: 1 addition & 1 deletion org.eclipse.wb.os.linux/.classpath
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-21"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-24"/>
<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
<classpathentry kind="src" path="src"/>
<classpathentry kind="output" path="bin"/>
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6 changes: 3 additions & 3 deletions org.eclipse.wb.os.linux/.settings/org.eclipse.jdt.core.prefs
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@@ -1,8 +1,8 @@
eclipse.preferences.version=1
org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
org.eclipse.jdt.core.compiler.codegen.targetPlatform=21
org.eclipse.jdt.core.compiler.codegen.targetPlatform=24
org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
org.eclipse.jdt.core.compiler.compliance=21
org.eclipse.jdt.core.compiler.compliance=24
org.eclipse.jdt.core.compiler.debug.lineNumber=generate
org.eclipse.jdt.core.compiler.debug.localVariable=generate
org.eclipse.jdt.core.compiler.debug.sourceFile=generate
Expand Down Expand Up @@ -65,7 +65,7 @@ org.eclipse.jdt.core.compiler.problem.unusedParameterWhenOverridingConcrete=disa
org.eclipse.jdt.core.compiler.problem.unusedPrivateMember=warning
org.eclipse.jdt.core.compiler.problem.varargsArgumentNeedCast=warning
org.eclipse.jdt.core.compiler.release=enabled
org.eclipse.jdt.core.compiler.source=21
org.eclipse.jdt.core.compiler.source=24
org.eclipse.jdt.core.formatter.align_assignment_statements_on_columns=false
org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
org.eclipse.jdt.core.formatter.align_selector_in_method_invocation_on_expression_first_line=true
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2 changes: 1 addition & 1 deletion org.eclipse.wb.os.linux/META-INF/MANIFEST.MF
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Expand Up @@ -4,7 +4,7 @@ Bundle-Name: %pluginName
Bundle-SymbolicName: org.eclipse.wb.os.linux;singleton:=true
Bundle-Version: 1.10.200.qualifier
Bundle-Vendor: %providerName
Bundle-RequiredExecutionEnvironment: JavaSE-21
Bundle-RequiredExecutionEnvironment: JavaSE-24
Eclipse-PlatformFilter: (& (osgi.ws=gtk) (osgi.os=linux))
Require-Bundle: org.eclipse.swt;bundle-version="[3.126.0,4.0.0)",
org.eclipse.core.runtime;bundle-version="[3.31.100,4.0.0)",
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54 changes: 54 additions & 0 deletions org.eclipse.wb.os.linux/src/org/eclipse/wb/internal/os/linux/gtk3/GTK3.java
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@@ -0,0 +1,54 @@
/*******************************************************************************
* Copyright (c) 2025 Patrick Ziegler and others.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* https://www.eclipse.org/legal/epl-2.0.
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Patrick Ziegler - initial API and implementation
*******************************************************************************/
package org.eclipse.wb.internal.os.linux.gtk3;

import java.lang.foreign.Arena;
import java.lang.foreign.FunctionDescriptor;
import java.lang.foreign.Linker;
import java.lang.foreign.MemorySegment;
import java.lang.foreign.SymbolLookup;
import java.lang.foreign.ValueLayout;
import java.lang.invoke.MethodHandle;

public final class GTK3 {
private static class InstanceHolder {
private static final Linker linker = Linker.nativeLinker();
private static final SymbolLookup gtk = SymbolLookup.libraryLookup("libgtk-3.so", Arena.ofAuto());

private static MethodHandle createHandle(String name, FunctionDescriptor descriptor) {
MemorySegment symbol = gtk.find(name).orElseThrow(UnsatisfiedLinkError::new);
return InstanceHolder.linker.downcallHandle(symbol, descriptor);
}

static final MethodHandle gtk_get_major_version = createHandle("gtk_get_major_version",
FunctionDescriptor.of(ValueLayout.JAVA_INT));

static final MethodHandle gtk_get_minor_version = createHandle("gtk_get_minor_version",
FunctionDescriptor.of(ValueLayout.JAVA_INT));

static final MethodHandle gtk_get_micro_version = createHandle("gtk_get_micro_version",
FunctionDescriptor.of(ValueLayout.JAVA_INT));
}

public static int gtk_get_major_version() throws Throwable {
return (int) InstanceHolder.gtk_get_major_version.invoke();
}

public static int gtk_get_minor_version() throws Throwable {
return (int) InstanceHolder.gtk_get_minor_version.invoke();
}

public static int gtk_get_micro_version() throws Throwable {
return (int) InstanceHolder.gtk_get_micro_version.invoke();
}
}
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