75 lines
1.4 KiB
C
75 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* Copyright (C) 2021 by Andreas Fritiofson <andreas.fritiofson@gmail.com> */
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/*
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* Simple example of using a circular doubly linked list through list.h
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*
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* gcc -I ../src/ list_example.c -o list_example
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include <assert.h>
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#include <helper/list.h>
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static LIST_HEAD(threads);
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struct thread {
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int id;
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uint64_t tcb_address;
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struct list_head lh;
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};
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void insert(struct thread *t)
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{
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list_add_tail(&t->lh, &threads);
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}
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void remove(struct thread *t)
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{
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list_del(&t->lh);
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}
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struct thread *lookup_id(int id)
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{
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struct thread *t;
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list_for_each_entry(t, &threads, lh) {
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if (t->id == id)
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return t;
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}
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return NULL;
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}
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struct thread *lookup_tcb(uint64_t addr)
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{
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struct thread *t;
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list_for_each_entry(t, &threads, lh) {
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if (t->tcb_address == addr)
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return t;
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}
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return NULL;
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}
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int main(void)
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{
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struct thread t1 = { .id = 1, .tcb_address = 111111111 };
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struct thread t2 = { .id = 2, .tcb_address = 222222222 };
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struct thread t3 = { .id = 3, .tcb_address = 333333333 };
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insert(&t1);
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insert(&t2);
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assert(lookup_id(1) == &t1);
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assert(lookup_tcb(111111111) == &t1);
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assert(lookup_id(2) == &t2);
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assert(lookup_id(42) == NULL);
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remove(&t1);
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assert(lookup_id(1) == NULL);
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insert(&t3);
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remove(&t2);
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assert(lookup_id(3) == &t3);
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assert(lookup_tcb(333333333) == &t3);
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assert(lookup_id(2) == NULL);
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remove(&t3);
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assert(list_empty(&threads));
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}
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