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https://github.com/bytecodealliance/wasm-micro-runtime.git
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92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/*
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* Copyright (C) 2023 Intel Corporation. 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 <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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pthread_key_t key;
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pthread_mutex_t lock;
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struct test_struct {
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int i;
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int k;
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};
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typedef struct point {
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int x;
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int y;
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} Point;
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void *
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child1(void *arg)
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{
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struct test_struct struct_data;
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struct_data.i = 10;
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struct_data.k = 5;
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pthread_mutex_lock(&lock);
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pthread_setspecific(key, &struct_data);
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printf("thread1--address of struct_data is --> %p\n", &(struct_data));
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printf("thread1--from pthread_getspecific(key) get the pointer and it "
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"points to --> %p\n",
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(struct test_struct *)pthread_getspecific(key));
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printf("thread1--from pthread_getspecific(key) get the pointer and print "
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"it's content:\nstruct_data.i:%d\nstruct_data.k: %d\n",
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((struct test_struct *)pthread_getspecific(key))->i,
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((struct test_struct *)pthread_getspecific(key))->k);
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printf("------------------------------------------------------\n");
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pthread_mutex_unlock(&lock);
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}
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void *
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child2(void *arg)
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{
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int temp = 20;
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pthread_mutex_lock(&lock);
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printf("thread2--temp's address is %p\n", &temp);
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pthread_setspecific(key, &temp);
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printf("thread2--from pthread_getspecific(key) get the pointer and it "
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"points to --> %p\n",
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(int *)pthread_getspecific(key));
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printf("thread2--from pthread_getspecific(key) get the pointer and print "
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"it's content --> temp:%d\n",
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*((int *)pthread_getspecific(key)));
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printf("------------------------------------------------------\n");
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pthread_mutex_unlock(&lock);
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}
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int
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main(void)
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{
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Point p;
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p.x = 10;
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p.y = 20;
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pthread_t tid1, tid2;
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pthread_mutex_init(&lock, NULL);
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pthread_key_create(&key, NULL);
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pthread_create(&tid1, NULL, child1, NULL);
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pthread_create(&tid2, NULL, child2, NULL);
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pthread_mutex_lock(&lock);
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printf("main--temp's address is %p\n", &p);
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pthread_setspecific(key, &p);
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printf("main--from pthread_getspecific(key) get the pointer and it points "
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"to --> %p\n",
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(int *)pthread_getspecific(key));
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printf("main--from pthread_getspecific(key) get the pointer and print "
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"it's content --> x:%d, y:%d\n",
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((Point *)pthread_getspecific(key))->x,
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((Point *)pthread_getspecific(key))->y);
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pthread_mutex_unlock(&lock);
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pthread_join(tid1, NULL);
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pthread_join(tid2, NULL);
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pthread_key_delete(key);
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return 0;
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}
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