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/**
* \file wasmtime/memory.h
*
* Wasmtime API for interacting with wasm memories.
*/
#ifndef WASMTIME_MEMORY_H
#define WASMTIME_MEMORY_H
#include <wasm.h>
#include <wasmtime/error.h>
#include <wasmtime/extern.h>
#include <wasmtime/store.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief Creates a new memory type from the specified parameters.
*
* Note that this function is preferred over #wasm_memorytype_new for
* compatibility with the memory64 proposal.
*/
WASM_API_EXTERN wasm_memorytype_t *wasmtime_memorytype_new(uint64_t min,
bool max_present,
uint64_t max,
bool is_64);
/**
* \brief Returns the minimum size, in pages, of the specified memory type.
*
* Note that this function is preferred over #wasm_memorytype_limits for
* compatibility with the memory64 proposal.
*/
WASM_API_EXTERN uint64_t
wasmtime_memorytype_minimum(const wasm_memorytype_t *ty);
/**
* \brief Returns the maximum size, in pages, of the specified memory type.
*
* If this memory type doesn't have a maximum size listed then `false` is
* returned. Otherwise `true` is returned and the `max` pointer is filled in
* with the specified maximum size, in pages.
*
* Note that this function is preferred over #wasm_memorytype_limits for
* compatibility with the memory64 proposal.
*/
WASM_API_EXTERN bool wasmtime_memorytype_maximum(const wasm_memorytype_t *ty,
uint64_t *max);
/**
* \brief Returns whether this type of memory represents a 64-bit memory.
*/
WASM_API_EXTERN bool wasmtime_memorytype_is64(const wasm_memorytype_t *ty);
/**
* \brief Returns whether this type of memory represents a shared memory.
*/
WASM_API_EXTERN bool wasmtime_memorytype_isshared(const wasm_memorytype_t *ty);
/**
* \brief Creates a new WebAssembly linear memory
*
* \param store the store to create the memory within
* \param ty the type of the memory to create
* \param ret where to store the returned memory
*
* If an error happens when creating the memory it's returned and owned by the
* caller. If an error happens then `ret` is not filled in.
*/
WASM_API_EXTERN wasmtime_error_t *
wasmtime_memory_new(wasmtime_context_t *store, const wasm_memorytype_t *ty,
wasmtime_memory_t *ret);
/**
* \brief Returns the type of the memory specified
*/
WASM_API_EXTERN wasm_memorytype_t *
wasmtime_memory_type(const wasmtime_context_t *store,
const wasmtime_memory_t *memory);
/**
* \brief Returns the base pointer in memory where the linear memory starts.
*/
WASM_API_EXTERN uint8_t *wasmtime_memory_data(const wasmtime_context_t *store,
const wasmtime_memory_t *memory);
/**
* \brief Returns the byte length of this linear memory.
*/
WASM_API_EXTERN size_t wasmtime_memory_data_size(
const wasmtime_context_t *store, const wasmtime_memory_t *memory);
/**
* \brief Returns the length, in WebAssembly pages, of this linear memory
*/
WASM_API_EXTERN uint64_t wasmtime_memory_size(const wasmtime_context_t *store,
const wasmtime_memory_t *memory);
/**
* \brief Attempts to grow the specified memory by `delta` pages.
*
* \param store the store that owns `memory`
* \param memory the memory to grow
* \param delta the number of pages to grow by
* \param prev_size where to store the previous size of memory
*
* If memory cannot be grown then `prev_size` is left unchanged and an error is
* returned. Otherwise `prev_size` is set to the previous size of the memory, in
* WebAssembly pages, and `NULL` is returned.
*/
WASM_API_EXTERN wasmtime_error_t *
wasmtime_memory_grow(wasmtime_context_t *store, const wasmtime_memory_t *memory,
uint64_t delta, uint64_t *prev_size);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // WASMTIME_MEMORY_H
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