mirror of
https://github.com/fluencelabs/wasmer
synced 2024-12-13 06:15:33 +00:00
250 lines
7.6 KiB
C
250 lines
7.6 KiB
C
#ifndef WASMER_H
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#define WASMER_H
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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typedef enum {
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WASMER_OK = 1,
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WASMER_ERROR = 2,
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} wasmer_result_t;
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enum wasmer_value_tag {
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WASM_I32,
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WASM_I64,
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WASM_F32,
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WASM_F64,
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};
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typedef uint32_t wasmer_value_tag;
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typedef struct wasmer_import_object_t wasmer_import_object_t;
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typedef struct wasmer_instance_context_t wasmer_instance_context_t;
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typedef struct wasmer_instance_t wasmer_instance_t;
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typedef struct {
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} wasmer_global_t;
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typedef union {
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int32_t I32;
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int64_t I64;
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float F32;
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double F64;
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} wasmer_value;
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typedef struct {
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wasmer_value_tag tag;
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wasmer_value value;
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} wasmer_value_t;
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typedef struct {
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bool mutable_;
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wasmer_value_tag kind;
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} wasmer_global_descriptor_t;
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typedef struct {
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} wasmer_memory_t;
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typedef struct {
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uint32_t min;
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uint32_t max;
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} wasmer_limits_t;
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typedef struct {
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} wasmer_table_t;
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/**
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* Frees memory for the given Global
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*/
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void wasmer_global_destroy(wasmer_global_t *global);
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/**
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* Gets the value stored by the given Global
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*/
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wasmer_value_t wasmer_global_get(wasmer_global_t *global);
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/**
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* Returns a descriptor (type, mutability) of the given Global
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*/
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wasmer_global_descriptor_t wasmer_global_get_descriptor(wasmer_global_t *global);
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/**
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* Creates a new Global and returns a pointer to it.
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* The caller owns the object and should call `wasmer_global_destroy` to free it.
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*/
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wasmer_global_t *wasmer_global_new(wasmer_value_t value, bool mutable_);
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/**
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* Sets the value stored by the given Global
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*/
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void wasmer_global_set(wasmer_global_t *global, wasmer_value_t value);
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/**
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* Frees memory for the given ImportObject
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*/
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void wasmer_import_object_destroy(wasmer_import_object_t *import_object);
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/**
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* Creates a new ImportObject and returns a pointer to it.
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* The caller owns the object and should call `wasmer_import_object_destroy` to free it.
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*/
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wasmer_import_object_t *wasmer_import_object_new(void);
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/**
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* Registers a `func` with provided `name` and `namespace` into the ImportObject.
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* Returns `wasmer_result_t::WASMER_OK` upon success.
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* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
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* and `wasmer_last_error_message` to get an error message.
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*/
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void wasmer_imports_set_import_func(wasmer_import_object_t *import_object,
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const char *namespace_,
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const char *name,
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void (*func)(void *data),
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const wasmer_value_tag *params,
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int params_len,
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const wasmer_value_tag *returns,
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int returns_len);
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/**
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* Calls an instances exported function by `name` with the provided parameters.
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* Results are set using the provided `results` pointer.
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* Returns `wasmer_result_t::WASMER_OK` upon success.
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* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
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* and `wasmer_last_error_message` to get an error message.
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*/
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wasmer_result_t wasmer_instance_call(wasmer_instance_t *instance,
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const char *name,
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const wasmer_value_t *params,
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int params_len,
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wasmer_value_t *results,
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int results_len);
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/**
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* Gets the memory within the context at the index `memory_idx`.
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* The index is always 0 until multiple memories are supported.
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*/
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const wasmer_memory_t *wasmer_instance_context_memory(wasmer_instance_context_t *ctx,
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uint32_t memory_idx);
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/**
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* Frees memory for the given Instance
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*/
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void wasmer_instance_destroy(wasmer_instance_t *instance);
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/**
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* Creates a new Instance from the given wasm bytes and imports.
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* Returns `wasmer_result_t::WASMER_OK` upon success.
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* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
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* and `wasmer_last_error_message` to get an error message.
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*/
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wasmer_result_t wasmer_instantiate(wasmer_instance_t **instance,
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uint8_t *wasm_bytes,
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uint32_t wasm_bytes_len,
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wasmer_import_object_t *import_object);
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/**
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* Gets the length in bytes of the last error.
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* This can be used to dynamically allocate a buffer with the correct number of
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* bytes needed to store a message.
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* # Example
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* ```
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* int error_len = wasmer_last_error_length();
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* char *error_str = malloc(error_len);
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* ```
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*/
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int wasmer_last_error_length(void);
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/**
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* Stores the last error message into the provided buffer up to the given `length`.
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* The `length` parameter must be large enough to store the last error message.
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* Returns the length of the string in bytes.
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* Returns `-1` if an error occurs.
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* # Example
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* ```
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* int error_len = wasmer_last_error_length();
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* char *error_str = malloc(error_len);
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* wasmer_last_error_message(error_str, error_len);
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* printf("Error str: `%s`\n", error_str);
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* ```
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*/
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int wasmer_last_error_message(char *buffer, int length);
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/**
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* Gets the start pointer to the bytes within a Memory
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*/
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uint8_t *wasmer_memory_data(wasmer_memory_t *mem);
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/**
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* Gets the size in bytes of a Memory
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*/
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uint32_t wasmer_memory_data_length(wasmer_memory_t *mem);
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/**
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* Frees memory for the given Memory
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*/
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void wasmer_memory_destroy(wasmer_memory_t *memory);
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/**
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* Grows a Memory by the given number of pages.
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* Returns `wasmer_result_t::WASMER_OK` upon success.
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* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
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* and `wasmer_last_error_message` to get an error message.
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*/
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wasmer_result_t wasmer_memory_grow(wasmer_memory_t *memory, uint32_t delta);
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/**
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* Returns the current length in pages of the given memory
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*/
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uint32_t wasmer_memory_length(wasmer_memory_t *memory);
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/**
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* Creates a new Memory for the given descriptor and initializes the given
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* pointer to pointer to a pointer to the new memory.
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* The caller owns the object and should call `wasmer_memory_destroy` to free it.
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* Returns `wasmer_result_t::WASMER_OK` upon success.
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* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
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* and `wasmer_last_error_message` to get an error message.
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*/
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wasmer_result_t wasmer_memory_new(wasmer_memory_t **memory, wasmer_limits_t limits);
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/**
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* Frees memory for the given Table
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*/
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void wasmer_table_destroy(wasmer_table_t *table);
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/**
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* Grows a Table by the given number of elements.
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* Returns `wasmer_result_t::WASMER_OK` upon success.
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* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
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* and `wasmer_last_error_message` to get an error message.
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*/
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wasmer_result_t wasmer_table_grow(wasmer_table_t *table, uint32_t delta);
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/**
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* Returns the current length of the given Table
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*/
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uint32_t wasmer_table_length(wasmer_table_t *table);
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/**
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* Creates a new Table for the given descriptor and initializes the given
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* pointer to pointer to a pointer to the new Table.
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* The caller owns the object and should call `wasmer_table_destroy` to free it.
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* Returns `wasmer_result_t::WASMER_OK` upon success.
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* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
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* and `wasmer_last_error_message` to get an error message.
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*/
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wasmer_result_t wasmer_table_new(wasmer_table_t **table, wasmer_limits_t limits);
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/**
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* Returns true for valid wasm bytes and false for invalid bytes
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*/
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bool wasmer_validate(uint8_t *wasm_bytes, uint32_t wasm_bytes_len);
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#endif /* WASMER_H */
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