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Implement module instance context APIs (#2436)

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Introduce module instance context APIs which can set one or more contexts created
by the embedder for a wasm module instance:
```C
    wasm_runtime_create_context_key
    wasm_runtime_destroy_context_key
    wasm_runtime_set_context
    wasm_runtime_set_context_spread
    wasm_runtime_get_context
```

And make libc-wasi use it and set wasi context as the first context bound to the wasm
module instance.

Also add samples.

Refer to https://github.com/bytecodealliance/wasm-micro-runtime/issues/2460.
This commit is contained in:
YAMAMOTO Takashi
2023-09-07 15:54:11 +09:00
committed by GitHub
parent af2f3c8759
commit 6c846acc59
35 changed files with 1190 additions and 56 deletions
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32
samples/inst-context-threads/src/native_impl.c Normal file
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/*
* Copyright (C) 2023 Midokura Japan KK. All rights reserved.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*/
#include <stddef.h>
#include <stdio.h>
#include "wasm_export.h"
#include "my_context.h"
void
set_context(wasm_exec_env_t exec_env, int32_t n)
{
wasm_module_inst_t inst = wasm_runtime_get_module_inst(exec_env);
printf("%s called on module inst %p\n", __func__, inst);
struct my_context *ctx = &my_context;
ctx->x = n;
wasm_runtime_set_context_spread(inst, my_context_key, ctx);
}
int32_t
get_context(wasm_exec_env_t exec_env)
{
wasm_module_inst_t inst = wasm_runtime_get_module_inst(exec_env);
printf("%s called on module inst %p\n", __func__, inst);
struct my_context *ctx = wasm_runtime_get_context(inst, my_context_key);
if (ctx == NULL) {
return -1;
}
return ctx->x;
}