1 #include <stdio.h>
2 #include <Windows.h>
3 #include <process.h>
4
5 using namespace std;
6
7 HANDLE sem_add, sem_subtract;
8
9 int val(0);
10
11 unsigned int __stdcall add(void* lpa)
12 {
13 printf("add\n");
14 while (true)
15 {
16 WaitForSingleObject(sem_add, INFINITE);
17 ++val;
18 printf("add: %d\n", val);
19 ReleaseSemaphore(sem_subtract, 1, NULL);
20 }
21
22 //return 999;
23 }
24
25 unsigned int __stdcall subtract(void* lpa)
26 {
27 printf("subtract\n");
28 while (true)
29 {
30 WaitForSingleObject(sem_subtract, INFINITE);
31 --val;
32 printf("subtract: %d\n", val);
33 ReleaseSemaphore(sem_add, 1, NULL);
34 }
35
36 //return 999;
37 }
38
39 int main(int argc, char ** argv)
40 {
41 sem_add = CreateSemaphore(NULL, 1, 10, NULL);
42
43 sem_subtract = CreateSemaphore(NULL, 0, 10, NULL);
44
45 //ReleaseSemaphore();
46 printf("[%d]: sem init 0\n", __LINE__);
47
48 HANDLE hThr;
49 hThr = (HANDLE)_beginthreadex(NULL, 0, add, NULL, 0, NULL);
50
51 HANDLE hThr2;
52 hThr2 = (HANDLE)_beginthreadex(NULL, 0, subtract, NULL, 0, NULL);
53
54
55 WaitForSingleObject(hThr, INFINITE);
56 WaitForSingleObject(hThr2, INFINITE);
57
58 return 0;
59 }
1 #include <stdio.h>
2 #include <semaphore.h>
3 #include <pthread.h>
4
5 using namespace std;
6
7 int val(0);
8
9 sem_t sem_add, sem_subtract;
10
11 void * addFun(void * arg)
12 {
13 while(true)
14 {
15 sem_wait(&sem_add);
16 ++val;
17 printf("addFun: %d\n", val);
18 sem_post(&sem_subtract);
19 }
20 }
21
22 void * subtractFun(void * arg)
23 {
24 while(true)
25 {
26 sem_wait(&sem_subtract);
27 --val;
28 printf("subtractFun: %d\n", val);
29 sem_post(&sem_add);
30 }
31 }
32
33 int main(int argc, char **argv)
34 {
35 int ret(0);
36 sem_init(&sem_add, 0, 10);
37 sem_init(&sem_subtract, 0, 0);
38 // printf("[%d]: %d\n", __LINE__, sem_val);
39
40 pthread_t t_id;
41 ret = pthread_create(&t_id, NULL, addFun, NULL);
42
43 pthread_t t_id2;
44 ret = pthread_create(&t_id2, NULL, subtractFun, NULL);
45
46 pthread_join(t_id, NULL);
47 pthread_join(t_id2, NULL);
48
49 return 0;
50 }
1 #include <stdio.h>
2 #include <Windows.h>
3 #include <process.h>
4
5 using namespace std;
6
7 //HANDLE sem_add, sem_subtract;
8 HANDLE eve_add, eve_subtract;
9
10
11 int val(0);
12
13 unsigned int __stdcall add(void* lpa)
14 {
15 printf("add\n");
16 while (true)
17 {
18 WaitForSingleObject(eve_add, INFINITE);
19 //ResetEvent(eve_add);
20 ++val;
21 printf("add: %d\n", val);
22 SetEvent(eve_subtract);
23 }
24 }
25
26 unsigned int __stdcall subtract(void* lpa)
27 {
28 printf("subtract\n");
29 while (true)
30 {
31 WaitForSingleObject(eve_subtract, INFINITE);
32 //ResetEvent(eve_subtract);
33 --val;
34 printf("subtract: %d\n", val);
35 SetEvent(eve_add);
36 }
37 }
38
39 int main(int argc, char ** argv)
40 {
41 eve_add = CreateEvent(NULL, false, TRUE, NULL);
42
43 eve_subtract = CreateEvent(NULL, false, FALSE, NULL);
44
45 printf("[%d]: sem init 0\n", __LINE__);
46
47 HANDLE hThr;
48 hThr = (HANDLE)_beginthreadex(NULL, 0, add, NULL, 0, NULL);
49
50 HANDLE hThr2;
51 hThr2 = (HANDLE)_beginthreadex(NULL, 0, subtract, NULL, 0, NULL);
52
53
54 WaitForSingleObject(hThr, INFINITE);
55 WaitForSingleObject(hThr2, INFINITE);
56
57 return 0;
58 }
