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https://github.com/bytecodealliance/wasm-micro-runtime.git
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6c846acc59
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.
66 lines
1.3 KiB
C
66 lines
1.3 KiB
C
/*
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* Copyright (C) 2023 Midokura Japan KK. All rights reserved.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*/
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#include <assert.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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void
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set_context(int32_t n) __attribute__((import_module("env")))
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__attribute__((import_name("set_context")));
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int32_t
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get_context() __attribute__((import_module("env")))
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__attribute__((import_name("get_context")));
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void *
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start(void *vp)
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{
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int32_t v;
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printf("thread started\n");
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printf("confirming the initial state on thread\n");
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v = get_context();
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assert(v == -1);
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printf("setting the context on thread\n");
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set_context(1234);
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printf("confirming the context on thread\n");
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v = get_context();
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assert(v == 1234);
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return NULL;
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}
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int
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main()
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{
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pthread_t t1;
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int32_t v;
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int ret;
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printf("confirming the initial state on main\n");
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v = get_context();
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assert(v == -1);
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printf("creating a thread\n");
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ret = pthread_create(&t1, NULL, start, NULL);
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assert(ret == 0);
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void *val;
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ret = pthread_join(t1, &val);
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assert(ret == 0);
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printf("joined the thread\n");
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printf("confirming the context propagated from the thread on main\n");
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v = get_context();
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assert(v == 1234);
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printf("success\n");
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return 0;
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}
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