jaspergeurtz/memdll

Java library to load native DLL's from memory instead of the filesystem

MemDLL

Load native DLL's from memory instead of the filesystem like required by JNA/JNI. For now windows-x64 only.

Uses MemoryModule to load the dll from memory.

Usecase

Often when using JNA with custom dll's you need to manually extract the dll from your jar. This library aims to avoid these unnecessary steps.

Example Comparison

Using MemDLL

interface MyDLL {
    void someFunc();
}
// load dll directly from resources, no copying
URL dllUrl = MyDLL.class.getClassLoader().getResource("MyDLL.dll");
MyDLL myDLL = MemDLL.load(dllUrl, MyDLL.class);
myDLL.someFunc();

Using only JNA

interface MyDLL extends Library {
    void someFunc();
}

//get from resources and copy to temp folder
File dllLocation = new File(System.getProperty("java.io.tmpdir"), "MyDLL.dll");
Files.copy(MyDLL.class.getClassLoader().getResourceAsStream("MyDLL.dll"), dllLocation.toPath());

// load dll
System.load(dllLocation.getAbsolutePath());
MyDLL myDLL = Native.load("MyDLL", MyDLL.class);
myDLL.someFunc();

Usage

• add it to your gradle/maven project via JitPack
• alternatively download the latest jar from the releases