Module holochain_wasmer_host::prelude
source · [−]Re-exports
Modules
Wrapper types to enable optimized handling of &[u8] and Vec<u8>.
The vm module re-exports wasmer-vm types.
A simple event-driven library for parsing WebAssembly binary files (or streams).
Macros
unidiomatic way to derive default trait implementations of TryFrom in/out of SerializedBytes
Generate an ImportObject easily with the imports! macro.
Structs
The Array marker type. This type can be used like WasmPtr<T, Array>
to get access to methods
Atomically.
Tunable parameters for WebAssembly compilation.
This is the reference implementation of the Tunables trait,
used by default.
Units of WebAssembly memory in terms of 8-bit bytes.
Global configuration options used to create an
wasmer_engine::Engine and customize its behavior.
A descriptor for an exported WebAssembly value.
Exports is a special kind of map that allows easily unwrapping the types of instances.
An iterator over exports.
Controls which experimental features will be enabled. Features usually have a corresponding WebAssembly proposal.
Description of a frame in a backtrace for a RuntimeError::trace.
A WebAssembly function instance.
The signature of a function that is either implemented in a Wasm module or exposed to Wasm by the host.
A WebAssembly global instance.
WebAssembly global.
All of the import data used when instantiating.
Iterator for an ImportObject’s exports.
A descriptor for an imported value into a wasm module.
The Item marker type. This is the default and does not usually need to be
specified.
Lazily init an item
Index type of a function defined locally inside the WebAssembly module.
A WebAssembly memory instance.
A descriptor for a WebAssembly memory type.
A view into a memory.
A error in the middleware.
The state of the binary reader. Exposed to middlewares to push their outputs.
A WebAssembly Module contains stateless WebAssembly code that has already been compiled and can be instantiated multiple times.
A Resolver that links two resolvers together in a chain.
A WebAssembly function that can be called natively (using the Native ABI).
Units of WebAssembly pages (as specified to be 65,536 bytes).
A struct representing an aborted instruction execution, with a message indicating the cause.
A Canonical Serialized Bytes representation for data If you have a data structure that needs a canonical byte representation use this Always round-trip through SerializedBytes via. a single TryFrom implementation. This ensures that the internal bytes of SerializedBytes are indeed canonical. The corrolary is that if bytes are NOT wrapped in SerializedBytes we can assume they are NOT canonical. Typically we need a canonical serialization when data is to be handled at the byte level by independently implemented and maintained systems.
The store represents all global state that can be manipulated by WebAssembly programs. It consists of the runtime representation of all instances of functions, tables, memories, and globals that have been allocated during the lifetime of the abstract machine.
A WebAssembly table instance.
A descriptor for a table in a WebAssembly module.
This is the target that we will use for compiling the WebAssembly ModuleInfo, and then run it.
A target “triple”. Historically such things had three fields, though they’ve added additional fields over time.
The Universal builder
A compiled wasm module, ready to be instantiated.
A WebAssembly Universal Engine.
UnsafeBytes the only way to implement a custom round trip through bytes for SerializedBytes It is intended to be an internal implementation in TryFrom implementations The assumption is that any code using UnsafeBytes is NOT valid messagepack data This allows us to enforce that all data round-tripping through SerializedBytes is via TryFrom and also allow for custom non-messagepack canonical representations of data types.
A mutable Wasm-memory location.
Enum of all possible ERROR codes that a Zome API Function could return.
A zero-cost type that represents a pointer to something in Wasm linear memory.
Enums
The “architecture” field, which in some cases also specifies a specific subarchitecture.
The calling convention, which specifies things like which registers are used for passing arguments, which registers are callee-saved, and so on.
The WebAssembly.CompileError object indicates an error during WebAssembly decoding or validation.
The nomenclature is inspired by the cpuid crate.
The list of supported features was initially retrieved from
cranelift-native.
Possible optimization levels for the Cranelift codegen backend.
The Deserialize error can occur when loading a compiled Module from a binary.
The value of an export passed from one instance to another.
An entity to export.
An Extern is the runtime representation of an entity that
can be imported or exported.
A list of all possible types which can be externally referenced from a WebAssembly module.
Globals are initialized via the const operators or by referring to another import.
An error while initializing the user supplied host env with the WasmerEnv trait.
An error while instantiating a module.
The WebAssembly.LinkError object indicates an error during module instantiation (besides traps from the start function).
Error type describing things that can go wrong when operating on Wasm Memories.
Indicator of whether a global is mutable or not
The “operating system” field, which sometimes implies an environment, and sometimes isn’t an actual operating system.
The error that can happen while parsing a str
to retrieve a CpuFeature.
The Serialize error can occur when serializing a compiled Module into a binary.
A list of all possible value types in WebAssembly.
A list of all possible value types in WebAssembly.
A WebAssembly translation error.
Constants
The Triple of the current host.
Version number of this crate.
The number of pages we can have before we run out of byte index space.
The minimum number of pages allowed.
WebAssembly page sizes are fixed to be 64KiB. Note: large page support may be added in an opt-in manner in the future.
Traits
A trait for chaining resolvers together.
The compiler configuration options.
A data structure that can be deserialized from any data format supported by Serde.
A unimplemented Wasmer Engine.
This trait is used to mark types as gettable from an Instance.
A trait to convert a Rust value to a WasmNativeType value,
or to convert WasmNativeType value to a Rust value.
A function middleware specialized for a single function.
The HostFunction trait represents the set of functions that
can be used as host function. To uphold this statement, it is
necessary for a function to be transformed into a pointer to
VMFunctionBody.
The LikeNamespace trait represents objects that act as a namespace for imports.
For example, an Instance or Namespace could be
considered namespaces that could provide imports to an instance.
A shared builder for function middlewares.
Import resolver connects imports with available exported values.
Import resolver connects imports with available exported values.
A data structure that can be serialized into any data format supported by Serde.
A trait represinting any object that lives in the Store.
Simple and safe type conversions that may fail in a controlled
way under some circumstances. It is the reciprocal of TryInto.
An attempted conversion that consumes self, which may or may not be
expensive.
An engine delegates the creation of memories, tables, and globals to a foreign implementor of this trait.
Trait for a Value type. A Value type is a type that is always valid and may be safely copied.
The WasmTypeList trait represents a tuple (list) of Wasm
typed values. It is used to get low-level representation of
such a tuple.
Trait for initializing the environments passed to host functions after instantiation but before execution.
Functions
Check if the provided bytes are wasm-like
Raises a user-defined trap immediately.
Parses in-memory bytes as either the WebAssembly Text format, or a binary WebAssembly module.
Type Definitions
a WasmSize integer that points to a position in wasm linear memory that the host and guest are sharing to communicate across function calls
a WasmSize integer that represents the size of bytes to read/write to memory in direct manipulations
A mutual exclusion primitive useful for protecting shared data
WebAssembly computations manipulate values of basic value types:
WebAssembly computations manipulate values of basic value types:
A convenient alias for a Result that uses WasmError as the error type.
something like usize for wasm wasm has a memory limit of 4GB so offsets and lengths fit in u32