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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, height=device-height, initial-scale=1, user-scalable=no"> <meta name="description" content="dart:ffi library API docs, for the Dart programming language."> <title>dart:ffi library - Dart API</title> <link rel="canonical" href="https://api.dart.dev/dart-ffi"> <link rel="preconnect" href="https://fonts.gstatic.com"> <link href="https://fonts.googleapis.com/css2?family=Roboto+Mono:ital,wght@0,300;0,400;0,500;0,700;1,400&display=swap" rel="stylesheet"> <link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@24,400,0,0" rel="stylesheet"> <link rel="stylesheet" href="../static-assets/github.css?v1"> <link rel="stylesheet" href="../static-assets/styles.css?v1"> <link rel="icon" href="../static-assets/favicon.png?v1">  <script async src="https://www.googletagmanager.com/gtag/js?id=G-VVQ8908SJ5"></script> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-VVQ8908SJ5'); </script> <link rel="preconnect" href="https://fonts.googleapis.com"> <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin> <link rel="preload" href="https://fonts.googleapis.com/css2?family=Google+Sans+Text:wght@400&family=Google+Sans:wght@500&display=swap" as="style"> <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Google+Sans+Text:wght@400&family=Google+Sans:wght@500&display=swap"> <link rel="stylesheet" href="https://www.gstatic.com/glue/cookienotificationbar/cookienotificationbar.min.css"> </head> <body data-base-href="../" data-using-base-href="false" class="light-theme"> <div id="overlay-under-drawer"></div> <header id="title"> menu <ol class="breadcrumbs gt-separated dark hidden-xs"> <li><a href="../index.html">Dart</a></li> <li class="self-crumb">dart:ffi</li> </ol> <div class="self-name">dart:ffi</div> <form class="search navbar-right" role="search"> <input type="text" id="search-box" autocomplete="off" disabled class="form-control typeahead" placeholder="Loading search..."> </form> <div class="toggle" id="theme-button" title="Toggle brightness"> <label for="theme"> <input type="checkbox" id="theme" value="light-theme"> dark_mode light_mode </label> </div> </header> <main> <div id="dartdoc-main-content" class="main-content" data-above-sidebar="" data-below-sidebar="dart-ffi/dart-ffi-library-sidebar.html"> <div> <div id="external-links" class="btn-group"><a title="View source code" class="source-link" href="https://github.com/dart-lang/sdk/blob/9594995093f642957b780603c6435d9e7a61b923/sdk/lib/ffi/ffi.dart#L11">description</a></div> <h1> dart:ffi library </h1> </div> <section class="desc markdown"> Foreign Function Interface for interoperability with the C programming language. For further details, please see: <a href="https://dart.dev/server/c-interop">https://dart.dev/server/c-interop</a>. </section> <section class="summary offset-anchor" id="classes"> <h2>Classes</h2> <dl> <dt id="Abi"> <a href="../dart-ffi/Abi-class.html">Abi</a> </dt> <dd> An application binary interface (ABI). </dd> <dt id="AbiSpecificInteger"> <a href="../dart-ffi/AbiSpecificInteger-class.html">AbiSpecificInteger</a> </dt> <dd> The supertype of all <a href="../dart-ffi/Abi-class.html">Abi</a>-specific integer types. </dd> <dt id="AbiSpecificIntegerMapping"> <a href="../dart-ffi/AbiSpecificIntegerMapping-class.html">AbiSpecificIntegerMapping</a> </dt> <dd> Mapping for a subtype of <a href="../dart-ffi/AbiSpecificInteger-class.html">AbiSpecificInteger</a>. </dd> <dt id="Allocator"> <a href="../dart-ffi/Allocator-class.html">Allocator</a> </dt> <dd> Manages memory on the native heap. </dd> <dt id="Array"> <a href="../dart-ffi/Array-class.html">Array</a><T extends <a href="../dart-ffi/NativeType-class.html">NativeType</a>> </dt> <dd> A fixed-sized array of <code>T</code>s. </dd> <dt id="Bool"> <a href="../dart-ffi/Bool-class.html">Bool</a> </dt> <dd> Represents a native bool in C. </dd> <dt id="Char"> <a href="../dart-ffi/Char-class.html">Char</a> </dt> <dd> The C <code>char</code> type. </dd> <dt id="Dart_CObject"> <a href="../dart-ffi/Dart_CObject-class.html">Dart_CObject</a> </dt> <dd> Opaque, not exposing it's members. </dd> <dt id="DartRepresentationOf"> <a href="../dart-ffi/DartRepresentationOf-class.html">DartRepresentationOf</a> </dt> <dd> </dd> <dt id="DefaultAsset"> <a href="../dart-ffi/DefaultAsset-class.html">DefaultAsset</a> </dt> <dd> Annotation specifying the default asset ID for the current library. </dd> <dt id="Double"> <a href="../dart-ffi/Double-class.html">Double</a> </dt> <dd> Represents a native 64 bit double in C. </dd> <dt id="DynamicLibrary"> <a href="../dart-ffi/DynamicLibrary-class.html">DynamicLibrary</a> </dt> <dd> A dynamically loaded native library. </dd> <dt id="Finalizable"> <a href="../dart-ffi/Finalizable-class.html">Finalizable</a> </dt> <dd> Marker interface for objects which should not be finalized too soon. </dd> <dt id="Float"> <a href="../dart-ffi/Float-class.html">Float</a> </dt> <dd> Represents a native 32 bit float in C. </dd> <dt id="Handle"> <a href="../dart-ffi/Handle-class.html">Handle</a> </dt> <dd> Represents <code>Dart_Handle</code> from <code>dart_api.h</code> in C. </dd> <dt id="Int"> <a href="../dart-ffi/Int-class.html">Int</a> </dt> <dd> The C <code>int</code> type. </dd> <dt id="Int16"> <a href="../dart-ffi/Int16-class.html">Int16</a> </dt> <dd> Represents a native signed 16 bit integer in C. </dd> <dt id="Int32"> <a href="../dart-ffi/Int32-class.html">Int32</a> </dt> <dd> Represents a native signed 32 bit integer in C. </dd> <dt id="Int64"> <a href="../dart-ffi/Int64-class.html">Int64</a> </dt> <dd> Represents a native signed 64 bit integer in C. </dd> <dt id="Int8"> <a href="../dart-ffi/Int8-class.html">Int8</a> </dt> <dd> Represents a native signed 8 bit integer in C. </dd> <dt id="IntPtr"> <a href="../dart-ffi/IntPtr-class.html">IntPtr</a> </dt> <dd> The C <code>intptr_t</code> type. </dd> <dt id="Long"> <a href="../dart-ffi/Long-class.html">Long</a> </dt> <dd> The C <code>long int</code>, aka. <code>long</code>, type. </dd> <dt id="LongLong"> <a href="../dart-ffi/LongLong-class.html">LongLong</a> </dt> <dd> The C <code>long long</code> type. </dd> <dt id="Native"> <a href="../dart-ffi/Native-class.html">Native</a><T> </dt> <dd> Annotation binding an external declaration to its native implementation. </dd> <dt id="NativeApi"> <a href="../dart-ffi/NativeApi-class.html">NativeApi</a> </dt> <dd> Utilities for accessing the Dart VM API from Dart code or from C code via <code>dart_api_dl.h</code>. </dd> <dt id="NativeCallable"> <a href="../dart-ffi/NativeCallable-class.html">NativeCallable</a><T extends <a href="../dart-core/Function-class.html">Function</a>> </dt> <dd> A native callable which listens for calls to a native function. </dd> <dt id="NativeFinalizer"> <a href="../dart-ffi/NativeFinalizer-class.html">NativeFinalizer</a> </dt> <dd> A native finalizer which can be attached to Dart objects. </dd> <dt id="NativeFunction"> <a href="../dart-ffi/NativeFunction-class.html">NativeFunction</a><T extends <a href="../dart-core/Function-class.html">Function</a>> </dt> <dd> Represents a function type in C. </dd> <dt id="NativeType"> <a href="../dart-ffi/NativeType-class.html">NativeType</a> </dt> <dd> <a href="../dart-ffi/NativeType-class.html">NativeType</a>'s subtypes represent a native type in C. </dd> <dt id="Opaque"> <a href="../dart-ffi/Opaque-class.html">Opaque</a> </dt> <dd> <a href="../dart-ffi/Opaque-class.html">Opaque</a>'s subtypes represent opaque types in C. </dd> <dt id="Packed"> <a href="../dart-ffi/Packed-class.html">Packed</a> </dt> <dd> Annotation to specify on <code>Struct</code> subtypes to indicate that its members need to be packed. </dd> <dt id="Pointer"> <a href="../dart-ffi/Pointer-class.html">Pointer</a><T extends <a href="../dart-ffi/NativeType-class.html">NativeType</a>> </dt> <dd> Represents a pointer into the native C memory. Cannot be extended. </dd> <dt id="Short"> <a href="../dart-ffi/Short-class.html">Short</a> </dt> <dd> The C <code>short</code> type. </dd> <dt id="SignedChar"> <a href="../dart-ffi/SignedChar-class.html">SignedChar</a> </dt> <dd> The C <code>signed char</code> type. </dd> <dt id="Size"> <a href="../dart-ffi/Size-class.html">Size</a> </dt> <dd> The C <code>size_t</code> type. </dd> <dt id="SizedNativeType"> <a href="../dart-ffi/SizedNativeType-class.html">SizedNativeType</a> </dt> <dd> A <a href="../dart-ffi/NativeType-class.html">NativeType</a> with a known size. </dd> <dt id="Struct"> <a href="../dart-ffi/Struct-class.html">Struct</a> </dt> <dd> The supertype of all FFI struct types. </dd> <dt id="Uint16"> <a href="../dart-ffi/Uint16-class.html">Uint16</a> </dt> <dd> Represents a native unsigned 16 bit integer in C. </dd> <dt id="Uint32"> <a href="../dart-ffi/Uint32-class.html">Uint32</a> </dt> <dd> Represents a native unsigned 32 bit integer in C. </dd> <dt id="Uint64"> <a href="../dart-ffi/Uint64-class.html">Uint64</a> </dt> <dd> Represents a native unsigned 64 bit integer in C. </dd> <dt id="Uint8"> <a href="../dart-ffi/Uint8-class.html">Uint8</a> </dt> <dd> Represents a native unsigned 8 bit integer in C. </dd> <dt id="UintPtr"> <a href="../dart-ffi/UintPtr-class.html">UintPtr</a> </dt> <dd> The C <code>uintptr_t</code> type. </dd> <dt id="Union"> <a href="../dart-ffi/Union-class.html">Union</a> </dt> <dd> The supertype of all FFI union types. </dd> <dt id="UnsignedChar"> <a href="../dart-ffi/UnsignedChar-class.html">UnsignedChar</a> </dt> <dd> The C <code>unsigned char</code> type. </dd> <dt id="UnsignedInt"> <a href="../dart-ffi/UnsignedInt-class.html">UnsignedInt</a> </dt> <dd> The C <code>unsigned int</code> type. </dd> <dt id="UnsignedLong"> <a href="../dart-ffi/UnsignedLong-class.html">UnsignedLong</a> </dt> <dd> The C <code>unsigned long int</code>, aka. <code>unsigned long</code>, type. </dd> <dt id="UnsignedLongLong"> <a href="../dart-ffi/UnsignedLongLong-class.html">UnsignedLongLong</a> </dt> <dd> The C <code>unsigned long long</code> type. </dd> <dt id="UnsignedShort"> <a href="../dart-ffi/UnsignedShort-class.html">UnsignedShort</a> </dt> <dd> The C <code>unsigned short</code> type. </dd> <dt id="VarArgs"> <a href="../dart-ffi/VarArgs-class.html">VarArgs</a><T extends <a href="../dart-core/Record-class.html">Record</a>> </dt> <dd> The types of variadic arguments passed in C. </dd> <dt id="Void"> <a href="../dart-ffi/Void-class.html">Void</a> </dt> <dd> Represents a void type in C. </dd> <dt id="WChar"> <a href="../dart-ffi/WChar-class.html">WChar</a> </dt> <dd> The C <code>wchar_t</code> type. </dd> </dl> </section> <section class="summary offset-anchor" id="extensions"> <h2>Extensions</h2> <dl> <dt id="AbiSpecificIntegerArray"> <a href="../dart-ffi/AbiSpecificIntegerArray.html">AbiSpecificIntegerArray</a> on <a href="../dart-ffi/Array-class.html">Array</a><T> </dt> <dd> Bounds checking indexing methods on <a href="../dart-ffi/Array-class.html">Array</a>s of <a href="../dart-ffi/AbiSpecificInteger-class.html">AbiSpecificInteger</a>. </dd> <dt id="AbiSpecificIntegerPointer"> <a href="../dart-ffi/AbiSpecificIntegerPointer.html">AbiSpecificIntegerPointer</a> on <a href="../dart-ffi/Pointer-class.html">Pointer</a><T> </dt> <dd> Extension on <a href="../dart-ffi/Pointer-class.html">Pointer</a> specialized for the type argument <a href="../dart-ffi/AbiSpecificInteger-class.html">AbiSpecificInteger</a>. </dd> <dt id="AllocatorAlloc"> <a href="../dart-ffi/AllocatorAlloc.html">AllocatorAlloc</a> on <a href="../dart-ffi/Allocator-class.html">Allocator</a> </dt> <dd> Extension on <a href="../dart-ffi/Allocator-class.html">Allocator</a> to provide allocation with <a href="../dart-ffi/NativeType-class.html">NativeType</a>. </dd> <dt id="ArrayAddress"> <a href="../dart-ffi/ArrayAddress.html">ArrayAddress</a> on <a href="../dart-ffi/Array-class.html">Array</a><T> </dt> <dd> </dd> <dt id="ArrayArray"> <a href="../dart-ffi/ArrayArray.html">ArrayArray</a> on <a href="../dart-ffi/Array-class.html">Array</a><<a href="../dart-ffi/Array-class.html">Array</a><T>> </dt> <dd> Bounds checking indexing methods on <a href="../dart-ffi/Array-class.html">Array</a>s of <a href="../dart-ffi/Array-class.html">Array</a>. </dd> <dt id="BoolAddress"> <a href="../dart-ffi/BoolAddress.html">BoolAddress</a> on <a href="../dart-core/bool-class.html">bool</a> </dt> <dd> </dd> <dt id="BoolArray"> <a href="../dart-ffi/BoolArray.html">BoolArray</a> on <a href="../dart-ffi/Array-class.html">Array</a><<a href="../dart-ffi/Bool-class.html">Bool</a>> </dt> <dd> Bounds checking indexing methods on <a href="../dart-ffi/Array-class.html">Array</a>s of <a href="../dart-ffi/Bool-class.html">Bool</a>. </dd> <dt id="BoolPointer"> <a href="../dart-ffi/BoolPointer.html">BoolPointer</a> on <a href="../dart-ffi/Pointer-class.html">Pointer</a><<a href="../dart-ffi/Bool-class.html">Bool</a>> </dt> <dd> Extension on <a href="../dart-ffi/Pointer-class.html">Pointer</a> specialized for the type argument <a href="../dart-ffi/Bool-class.html">Bool</a>. </dd> <dt id="DoubleAddress"> <a href="../dart-ffi/DoubleAddress.html">DoubleAddress</a> on <a href="../dart-core/double-class.html">double</a> </dt> <dd> </dd> <dt id="DoubleArray"> <a href="../dart-ffi/DoubleArray.html">DoubleArray</a> on <a href="../dart-ffi/Array-class.html">Array</a><<a href="../dart-ffi/Double-class.html">Double</a>> </dt> <dd> Bounds checking indexing methods on <a href="../dart-ffi/Array-class.html">Array</a>s of <a href="../dart-ffi/Double-class.html">Double</a>. </dd> <dt id="DoublePointer"> <a href="../dart-ffi/DoublePointer.html">DoublePointer</a> on <a href="../dart-ffi/Pointer-class.html">Pointer</a><<a href="../dart-ffi/Double-class.html">Double</a>> </dt> <dd> Extension on <a href="../dart-ffi/Pointer-class.html">Pointer</a> specialized for the type argument <a href="../dart-ffi/Double-class.html">Double</a>. </dd> <dt id="DynamicLibraryExtension"> <a href="../dart-ffi/DynamicLibraryExtension.html">DynamicLibraryExtension</a> on <a href="../dart-ffi/DynamicLibrary-class.html">DynamicLibrary</a> </dt> <dd> Method which must not be invoked dynamically. </dd> <dt id="Float32ListAddress"> <a href="../dart-ffi/Float32ListAddress.html">Float32ListAddress</a> on <a href="../dart-typed_data/Float32List-class.html">Float32List</a> </dt> <dd> </dd> <dt id="Float64ListAddress"> <a href="../dart-ffi/Float64ListAddress.html">Float64ListAddress</a> on <a href="../dart-typed_data/Float64List-class.html">Float64List</a> </dt> <dd> </dd> <dt id="FloatArray"> <a href="../dart-ffi/FloatArray.html">FloatArray</a> on <a href="../dart-ffi/Array-class.html">Array</a><<a href="../dart-ffi/Float-class.html">Float</a>> </dt> <dd> Bounds checking indexing methods on <a href="../dart-ffi/Array-class.html">Array</a>s of <a href="../dart-ffi/Float-class.html">Float</a>. </dd> <dt id="FloatPointer"> <a href="../dart-ffi/FloatPointer.html">FloatPointer</a> on <a href="../dart-ffi/Pointer-class.html">Pointer</a><<a href="../dart-ffi/Float-class.html">Float</a>> </dt> <dd> Extension on <a href="../dart-ffi/Pointer-class.html">Pointer</a> specialized for the type argument <a href="../dart-ffi/Float-class.html">Float</a>. </dd> <dt id="Int16Array"> <a href="../dart-ffi/Int16Array.html">Int16Array</a> on <a href="../dart-ffi/Array-class.html">Array</a><<a href="../dart-ffi/Int16-class.html">Int16</a>> </dt> <dd> Bounds checking indexing methods on <a href="../dart-ffi/Array-class.html">Array</a>s of <a href="../dart-ffi/Int16-class.html">Int16</a>. </dd> <dt id="Int16ListAddress"> <a href="../dart-ffi/Int16ListAddress.html">Int16ListAddress</a> on <a href="../dart-typed_data/Int16List-class.html">Int16List</a> </dt> <dd> </dd> <dt id="Int16Pointer"> <a href="../dart-ffi/Int16Pointer.html">Int16Pointer</a> on <a href="../dart-ffi/Pointer-class.html">Pointer</a><<a href="../dart-ffi/Int16-class.html">Int16</a>> </dt> <dd> Extension on <a href="../dart-ffi/Pointer-class.html">Pointer</a> specialized for the type argument <a href="../dart-ffi/Int16-class.html">Int16</a>. </dd> <dt id="Int32Array"> <a href="../dart-ffi/Int32Array.html">Int32Array</a> on <a href="../dart-ffi/Array-class.html">Array</a><<a href="../dart-ffi/Int32-class.html">Int32</a>> </dt> <dd> Bounds checking indexing methods on <a href="../dart-ffi/Array-class.html">Array</a>s of <a href="../dart-ffi/Int32-class.html">Int32</a>. </dd> <dt id="Int32ListAddress"> <a href="../dart-ffi/Int32ListAddress.html">Int32ListAddress</a> on <a href="../dart-typed_data/Int32List-class.html">Int32List</a> </dt> <dd> </dd> <dt id="Int32Pointer"> <a href="../dart-ffi/Int32Pointer.html">Int32Pointer</a> on <a href="../dart-ffi/Pointer-class.html">Pointer</a><<a href="../dart-ffi/Int32-class.html">Int32</a>> </dt> <dd> Extension on <a href="../dart-ffi/Pointer-class.html">Pointer</a> specialized for the type argument <a href="../dart-ffi/Int32-class.html">Int32</a>. </dd> <dt id="Int64Array"> <a href="../dart-ffi/Int64Array.html">Int64Array</a> on <a href="../dart-ffi/Array-class.html">Array</a><<a href="../dart-ffi/Int64-class.html">Int64</a>> </dt> <dd> Bounds checking indexing methods on <a href="../dart-ffi/Array-class.html">Array</a>s of <a href="../dart-ffi/Int64-class.html">Int64</a>. </dd> <dt id="Int64ListAddress"> <a href="../dart-ffi/Int64ListAddress.html">Int64ListAddress</a> on <a href="../dart-typed_data/Int64List-class.html">Int64List</a> </dt> <dd> </dd> <dt id="Int64Pointer"> <a href="../dart-ffi/Int64Pointer.html">Int64Pointer</a> on <a href="../dart-ffi/Pointer-class.html">Pointer</a><<a href="../dart-ffi/Int64-class.html">Int64</a>> </dt> <dd> Extension on <a href="../dart-ffi/Pointer-class.html">Pointer</a> specialized for the type argument <a href="../dart-ffi/Int64-class.html">Int64</a>. </dd> <dt id="Int8Array"> <a href="../dart-ffi/Int8Array.html">Int8Array</a> on <a href="../dart-ffi/Array-class.html">Array</a><<a href="../dart-ffi/Int8-class.html">Int8</a>> </dt> <dd> Bounds checking indexing methods on <a href="../dart-ffi/Array-class.html">Array</a>s of <a href="../dart-ffi/Int8-class.html">Int8</a>. </dd> <dt id="Int8ListAddress"> <a href="../dart-ffi/Int8ListAddress.html">Int8ListAddress</a> on <a href="../dart-typed_data/Int8List-class.html">Int8List</a> </dt> <dd> </dd> <dt id="Int8Pointer"> <a href="../dart-ffi/Int8Pointer.html">Int8Pointer</a> on <a href="../dart-ffi/Pointer-class.html">Pointer</a><<a href="../dart-ffi/Int8-class.html">Int8</a>> </dt> <dd> Extension on <a href="../dart-ffi/Pointer-class.html">Pointer</a> specialized for the type argument <a href="../dart-ffi/Int8-class.html">Int8</a>. </dd> <dt id="IntAddress"> <a href="../dart-ffi/IntAddress.html">IntAddress</a> on <a href="../dart-core/int-class.html">int</a> </dt> <dd> </dd> <dt id="NativeFunctionPointer"> <a href="../dart-ffi/NativeFunctionPointer.html">NativeFunctionPointer</a> on <a href="../dart-ffi/Pointer-class.html">Pointer</a><<a href="../dart-ffi/NativeFunction-class.html">NativeFunction</a><NF>> </dt> <dd> Extension on <a href="../dart-ffi/Pointer-class.html">Pointer</a> specialized for the type argument <a href="../dart-ffi/NativeFunction-class.html">NativeFunction</a>. </dd> <dt id="NativePort"> <a href="../dart-ffi/NativePort.html">NativePort</a> on <a href="../dart-isolate/SendPort-class.html">SendPort</a> </dt> <dd> Extension to retrieve the native <code>Dart_Port</code> from a <a href="../dart-isolate/SendPort-class.html">SendPort</a>. </dd> <dt id="PointerArray"> <a href="../dart-ffi/PointerArray.html">PointerArray</a> on <a href="../dart-ffi/Array-class.html">Array</a><<a href="../dart-ffi/Pointer-class.html">Pointer</a><T>> </dt> <dd> Bounds checking indexing methods on <a href="../dart-ffi/Array-class.html">Array</a>s of <a href="../dart-ffi/Pointer-class.html">Pointer</a>. </dd> <dt id="PointerPointer"> <a href="../dart-ffi/PointerPointer.html">PointerPointer</a> on <a href="../dart-ffi/Pointer-class.html">Pointer</a><<a href="../dart-ffi/Pointer-class.html">Pointer</a><T>> </dt> <dd> Extension on <a href="../dart-ffi/Pointer-class.html">Pointer</a> specialized for the type argument <a href="../dart-ffi/Pointer-class.html">Pointer</a>. </dd> <dt id="StructAddress"> <a href="../dart-ffi/StructAddress.html">StructAddress</a> on T </dt> <dd> </dd> <dt id="StructArray"> <a href="../dart-ffi/StructArray.html">StructArray</a> on <a href="../dart-ffi/Array-class.html">Array</a><T> </dt> <dd> Bounds checking indexing methods on <a href="../dart-ffi/Array-class.html">Array</a>s of <a href="../dart-ffi/Struct-class.html">Struct</a>. </dd> <dt id="StructPointer"> <a href="../dart-ffi/StructPointer.html">StructPointer</a> on <a href="../dart-ffi/Pointer-class.html">Pointer</a><T> </dt> <dd> Extension on <a href="../dart-ffi/Pointer-class.html">Pointer</a> specialized for the type argument <a href="../dart-ffi/Struct-class.html">Struct</a>. </dd> <dt id="Uint16Array"> <a href="../dart-ffi/Uint16Array.html">Uint16Array</a> on <a href="../dart-ffi/Array-class.html">Array</a><<a href="../dart-ffi/Uint16-class.html">Uint16</a>> </dt> <dd> Bounds checking indexing methods on <a href="../dart-ffi/Array-class.html">Array</a>s of <a href="../dart-ffi/Uint16-class.html">Uint16</a>. </dd> <dt id="Uint16ListAddress"> <a href="../dart-ffi/Uint16ListAddress.html">Uint16ListAddress</a> on <a href="../dart-typed_data/Uint16List-class.html">Uint16List</a> </dt> <dd> </dd> <dt id="Uint16Pointer"> <a href="../dart-ffi/Uint16Pointer.html">Uint16Pointer</a> on <a href="../dart-ffi/Pointer-class.html">Pointer</a><<a href="../dart-ffi/Uint16-class.html">Uint16</a>> </dt> <dd> Extension on <a href="../dart-ffi/Pointer-class.html">Pointer</a> specialized for the type argument <a href="../dart-ffi/Uint16-class.html">Uint16</a>. </dd> <dt id="Uint32Array"> <a href="../dart-ffi/Uint32Array.html">Uint32Array</a> on <a href="../dart-ffi/Array-class.html">Array</a><<a href="../dart-ffi/Uint32-class.html">Uint32</a>> </dt> <dd> Bounds checking indexing methods on <a href="../dart-ffi/Array-class.html">Array</a>s of <a href="../dart-ffi/Uint32-class.html">Uint32</a>. </dd> <dt id="Uint32ListAddress"> <a href="../dart-ffi/Uint32ListAddress.html">Uint32ListAddress</a> on <a href="../dart-typed_data/Uint32List-class.html">Uint32List</a> </dt> <dd> </dd> <dt id="Uint32Pointer"> <a href="../dart-ffi/Uint32Pointer.html">Uint32Pointer</a> on <a href="../dart-ffi/Pointer-class.html">Pointer</a><<a href="../dart-ffi/Uint32-class.html">Uint32</a>> </dt> <dd> Extension on <a href="../dart-ffi/Pointer-class.html">Pointer</a> specialized for the type argument <a href="../dart-ffi/Uint32-class.html">Uint32</a>. </dd> <dt id="Uint64Array"> <a href="../dart-ffi/Uint64Array.html">Uint64Array</a> on <a href="../dart-ffi/Array-class.html">Array</a><<a href="../dart-ffi/Uint64-class.html">Uint64</a>> </dt> <dd> Bounds checking indexing methods on <a href="../dart-ffi/Array-class.html">Array</a>s of <a href="../dart-ffi/Uint64-class.html">Uint64</a>. </dd> <dt id="Uint64ListAddress"> <a href="../dart-ffi/Uint64ListAddress.html">Uint64ListAddress</a> on <a href="../dart-typed_data/Uint64List-class.html">Uint64List</a> </dt> <dd> </dd> <dt id="Uint64Pointer"> <a href="../dart-ffi/Uint64Pointer.html">Uint64Pointer</a> on <a href="../dart-ffi/Pointer-class.html">Pointer</a><<a href="../dart-ffi/Uint64-class.html">Uint64</a>> </dt> <dd> Extension on <a href="../dart-ffi/Pointer-class.html">Pointer</a> specialized for the type argument <a href="../dart-ffi/Uint64-class.html">Uint64</a>. </dd> <dt id="Uint8Array"> <a href="../dart-ffi/Uint8Array.html">Uint8Array</a> on <a href="../dart-ffi/Array-class.html">Array</a><<a href="../dart-ffi/Uint8-class.html">Uint8</a>> </dt> <dd> Bounds checking indexing methods on <a href="../dart-ffi/Array-class.html">Array</a>s of <a href="../dart-ffi/Uint8-class.html">Uint8</a>. </dd> <dt id="Uint8ListAddress"> <a href="../dart-ffi/Uint8ListAddress.html">Uint8ListAddress</a> on <a href="../dart-typed_data/Uint8List-class.html">Uint8List</a> </dt> <dd> </dd> <dt id="Uint8Pointer"> <a href="../dart-ffi/Uint8Pointer.html">Uint8Pointer</a> on <a href="../dart-ffi/Pointer-class.html">Pointer</a><<a href="../dart-ffi/Uint8-class.html">Uint8</a>> </dt> <dd> Extension on <a href="../dart-ffi/Pointer-class.html">Pointer</a> specialized for the type argument <a href="../dart-ffi/Uint8-class.html">Uint8</a>. </dd> <dt id="UnionAddress"> <a href="../dart-ffi/UnionAddress.html">UnionAddress</a> on T </dt> <dd> </dd> <dt id="UnionArray"> <a href="../dart-ffi/UnionArray.html">UnionArray</a> on <a href="../dart-ffi/Array-class.html">Array</a><T> </dt> <dd> Bounds checking indexing methods on <a href="../dart-ffi/Array-class.html">Array</a>s of <a href="../dart-ffi/Union-class.html">Union</a>. </dd> <dt id="UnionPointer"> <a href="../dart-ffi/UnionPointer.html">UnionPointer</a> on <a href="../dart-ffi/Pointer-class.html">Pointer</a><T> </dt> <dd> Extension on <a href="../dart-ffi/Pointer-class.html">Pointer</a> specialized for the type argument <a href="../dart-ffi/Union-class.html">Union</a>. </dd> </dl> </section> <section class="summary offset-anchor" id="properties"> <h2>Properties</h2> <dl class="properties"> <dt id="nullptr" class="property"> <a href="../dart-ffi/nullptr.html">nullptr</a> → <a href="../dart-ffi/Pointer-class.html">Pointer</a><Never> </dt> <dd> Represents a pointer into the native C memory corresponding to 'NULL', e.g. a pointer with address 0. <div class="features">final</div> </dd> </dl> </section> <section class="summary offset-anchor" id="functions"> <h2>Functions</h2> <dl class="callables"> <dt id="sizeOf" class="callable"> <a href="../dart-ffi/sizeOf.html">sizeOf</a><T extends <a href="../dart-ffi/SizedNativeType-class.html">SizedNativeType</a>>() → <a href="../dart-core/int-class.html">int</a> </dt> <dd> Number of bytes used by native type T. </dd> </dl> </section> <section class="summary offset-anchor" id="typedefs"> <h2>Typedefs</h2> <dl> <dt id="Dart_NativeMessageHandler" class="callable"> <a href="../dart-ffi/Dart_NativeMessageHandler.html">Dart_NativeMessageHandler</a> = <a href="../dart-ffi/Void-class.html">Void</a> Function(<a href="../dart-ffi/Int64-class.html">Int64</a>, <a href="../dart-ffi/Pointer-class.html">Pointer</a><<a href="../dart-ffi/Dart_CObject-class.html">Dart_CObject</a>>) </dt> <dd> </dd> <dt id="NativeFinalizerFunction" class=""> <a href="../dart-ffi/NativeFinalizerFunction.html">NativeFinalizerFunction</a> = <a href="../dart-ffi/NativeFunction-class.html">NativeFunction</a><<a href="../dart-ffi/Void-class.html">Void</a> Function(<a href="../dart-ffi/Pointer-class.html">Pointer</a><<a href="../dart-ffi/Void-class.html">Void</a>> token)> </dt> <dd> The native function type for <a href="../dart-ffi/NativeFinalizer-class.html">NativeFinalizer</a>s. </dd> </dl> </section> </div>  <div id="dartdoc-sidebar-left" class="sidebar sidebar-offcanvas-left">  <header id="header-search-sidebar" class="hidden-l"> <form class="search-sidebar" role="search"> <input type="text" id="search-sidebar" autocomplete="off" disabled class="form-control typeahead" placeholder="Loading search..."> </form> </header> <ol class="breadcrumbs gt-separated dark hidden-l" id="sidebar-nav"> <li><a href="../index.html">Dart</a></li> <li class="self-crumb">dart:ffi</li> </ol> <h5>Dart SDK</h5> <ol> <li class="section-title">Libraries</li> <li class="section-subtitle">Core</li> <li class="section-subitem"><a href="../dart-async">dart:async</a></li> <li class="section-subitem"><a href="../dart-collection">dart:collection</a></li> <li class="section-subitem"><a href="../dart-convert">dart:convert</a></li> <li class="section-subitem"><a href="../dart-core">dart:core</a></li> <li class="section-subitem"><a href="../dart-developer">dart:developer</a></li> <li class="section-subitem"><a href="../dart-math">dart:math</a></li> <li class="section-subitem"><a href="../dart-typed_data">dart:typed_data</a></li> <li class="section-subtitle">VM</li> <li class="section-subitem"><a href="../dart-ffi">dart:ffi</a></li> <li class="section-subitem"><a href="../dart-io">dart:io</a></li> <li class="section-subitem"><a href="../dart-isolate">dart:isolate</a></li> <li class="section-subitem"><a href="../dart-mirrors">dart:mirrors</a></li> <li class="section-subtitle">Web</li> <li class="section-subitem"> <a href="https://pub.dev/documentation/web/latest/" target="_blank"> package:web open_in_new </a> </li> <li class="section-subitem"><a href="../dart-js_interop">dart:js_interop</a></li> <li class="section-subitem"><a 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