java - Native.loadLibrary 中的选项

Question

我从事 JNA 工作已经有一段时间了。但有一件事我没明白。例如，加载库时:

Map<String, Integer> options = new HashMap<String, Integer>();
options.put(Library.OPTION_CALLING_CONVENTION, StdCallLibrary.STDCALL_CONVENTION);
this.EDSDK = (EdSdkLibrary) Native.loadLibrary("EDSDK/dll/EDSDK.dll", EdSdkLibrary.class, options);

上面的选项到底是什么？

api说:

public static Object loadLibrary(String name, Class interfaceClass, Map options)

Load a library interface from the given shared library, providing the explicit interface class and a map of options for the library. If no library options are detected the map is interpreted as a map of Java method names to native function names. If name is null, attempts to map onto the current process.

上面的库选项图是什么意思？

Answer 1

这是一张包含库选项的 map 。其中一个选项是函数映射器。 您可以在下面找到一个示例:

    System.setProperty("jna.library.path","SiUSBXp.dll");
    HashMap<String, StdCallFunctionMapper> optionMap = new HashMap<String,    StdCallFunctionMapper>();
    StdCallFunctionMapper myMapper = new StdCallFunctionMapper();
    optionMap.put(Library.OPTION_FUNCTION_MAPPER, myMapper);
    INSTANCE = (SiUSBXp) Native.loadLibrary("SiUSBXp", SiUSBXp.class, optionMap);