1570af302Sopenharmony_ci/*
2570af302Sopenharmony_ci * Copyright (c) 2022 Huawei Device Co., Ltd.
3570af302Sopenharmony_ci * Licensed under the Apache License, Version 2.0 (the "License");
4570af302Sopenharmony_ci * you may not use this file except in compliance with the License.
5570af302Sopenharmony_ci * You may obtain a copy of the License at
6570af302Sopenharmony_ci *
7570af302Sopenharmony_ci *     http://www.apache.org/licenses/LICENSE-2.0
8570af302Sopenharmony_ci *
9570af302Sopenharmony_ci * Unless required by applicable law or agreed to in writing, software
10570af302Sopenharmony_ci * distributed under the License is distributed on an "AS IS" BASIS,
11570af302Sopenharmony_ci * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12570af302Sopenharmony_ci * See the License for the specific language governing permissions and
13570af302Sopenharmony_ci * limitations under the License.
14570af302Sopenharmony_ci */
15570af302Sopenharmony_ci
16570af302Sopenharmony_ci#include <stdlib.h>
17570af302Sopenharmony_ci#include <threads.h>
18570af302Sopenharmony_ci#include "functionalext.h"
19570af302Sopenharmony_ci
20570af302Sopenharmony_cistatic char list[100];
21570af302Sopenharmony_cistatic char buf[12] = "called once";
22570af302Sopenharmony_civoid do_once(void)
23570af302Sopenharmony_ci{
24570af302Sopenharmony_ci    FILE *fp = fopen("call_once.txt", "a+");
25570af302Sopenharmony_ci    fwrite(buf, sizeof(char), strlen(buf), fp);
26570af302Sopenharmony_ci    fclose(fp);
27570af302Sopenharmony_ci    FILE *fp2 = fopen("call_once.txt", "r");
28570af302Sopenharmony_ci    fread(list, sizeof(list), 1, fp2);
29570af302Sopenharmony_ci    fclose(fp2);
30570af302Sopenharmony_ci}
31570af302Sopenharmony_cistatic once_flag flag = ONCE_FLAG_INIT;
32570af302Sopenharmony_civoid func(void *data)
33570af302Sopenharmony_ci{
34570af302Sopenharmony_ci    call_once(&flag, do_once);
35570af302Sopenharmony_ci}
36570af302Sopenharmony_ci
37570af302Sopenharmony_ci/**
38570af302Sopenharmony_ci * @tc.name      : call_once_0100
39570af302Sopenharmony_ci * @tc.desc      : Each parameter is valid, and the function func is called only once.
40570af302Sopenharmony_ci * @tc.level     : Level 0
41570af302Sopenharmony_ci */
42570af302Sopenharmony_civoid call_once_0100(void)
43570af302Sopenharmony_ci{
44570af302Sopenharmony_ci    EXPECT_EQ("call_once_0100", strcmp(list, buf), 0);
45570af302Sopenharmony_ci}
46570af302Sopenharmony_ci
47570af302Sopenharmony_ciint main(void)
48570af302Sopenharmony_ci{
49570af302Sopenharmony_ci    thrd_t t1, t2, t3, t4;
50570af302Sopenharmony_ci    thrd_create(&t1, (thrd_start_t)func, NULL);
51570af302Sopenharmony_ci    thrd_create(&t2, (thrd_start_t)func, NULL);
52570af302Sopenharmony_ci    thrd_create(&t3, (thrd_start_t)func, NULL);
53570af302Sopenharmony_ci    thrd_create(&t4, (thrd_start_t)func, NULL);
54570af302Sopenharmony_ci    thrd_join(t1, NULL);
55570af302Sopenharmony_ci    thrd_join(t2, NULL);
56570af302Sopenharmony_ci    thrd_join(t3, NULL);
57570af302Sopenharmony_ci    thrd_join(t4, NULL);
58570af302Sopenharmony_ci    call_once_0100();
59570af302Sopenharmony_ci    remove("call_once.txt");
60570af302Sopenharmony_ci    memset(list, 0x00, sizeof(list));
61570af302Sopenharmony_ci    return t_status;
62570af302Sopenharmony_ci}