1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
#include "./worker.h"
#include "./net/client.h"
#include <pthread.h>
typedef struct {
pthread_t tid;
} worker_proc_t;
typedef struct {
conn_t* conn;
pthread_mutex_t mutex;
int num_procs;
worker_proc_t* procs;
worker_func_t func;
} worker_t;
worker_t* wrk = NULL;
void worker_init(const char* srv_addr, const char* srv_port, int num_cpu, worker_func_t func) {
if (wrk != NULL) {
fprintf(stderr, "[worker_init] Worker has already been initialized\n");
exit(EXIT_FAILURE);
}
wrk = calloc(1, sizeof(*wrk));
wrk->conn = client_connect_to_server(srv_addr, srv_port);
if (wrk->conn == NULL) {
fprintf(stderr, "[worker_init] Failed to connect to the controller\n");
exit(EXIT_FAILURE);
}
wrk->procs = calloc(num_cpu, sizeof(*wrk->procs));
wrk->func = func;
wrk->num_procs = num_cpu;
pthread_mutex_init(&wrk->mutex, NULL);
}
char worker_buf[1024 * 1024];
void* worker_proc_thread(void* args) {
args = (void*) args;
while (1) {
if (pthread_mutex_lock(&wrk->mutex) != 0) {
fprintf(stderr, "[proc_thread] Unable to call pthread_mutex_lock\n");
exit(EXIT_FAILURE);
}
worker_buf[0] = REQUEST_TYPE_GET_TASK;
conn_write(wrk->conn, worker_buf, 1);
size_t size;
char* task = conn_read(wrk->conn, &size);
if (pthread_mutex_unlock(&wrk->mutex) != 0) {
fprintf(stderr, "[proc_thread] Unable to call pthread_mutex_unlock\n");
exit(EXIT_FAILURE);
}
if (size <= 4) {
free(task);
break;
}
char* resp;
size_t resp_size;
wrk->func(task + 4, size - 4, &resp, &resp_size);
memcpy(worker_buf + 1, task, 4);
free(task);
if (pthread_mutex_lock(&wrk->mutex) != 0) {
fprintf(stderr, "[proc_thread] Unable to call pthread_mutex_lock\n");
exit(EXIT_FAILURE);
}
worker_buf[0] = REQUEST_TYPE_PUT_RESULT;
memcpy(worker_buf + 5, resp, resp_size);
conn_write(wrk->conn, worker_buf, resp_size + 5);
free(resp);
free(conn_read(wrk->conn, &size));
if (pthread_mutex_unlock(&wrk->mutex) != 0) {
fprintf(stderr, "[proc_thread] Unable to call pthread_mutex_unlock\n");
exit(EXIT_FAILURE);
}
}
return NULL;
}
void worker_exec() {
for (int i = 0; i < wrk->num_procs; i++) {
worker_proc_t* proc = &wrk->procs[i];
int ret = pthread_create(&proc->tid, NULL, worker_proc_thread, proc);
if (ret != 0) {
fprintf(stderr, "[worker_exec] Unable to start thread\n");
exit(EXIT_FAILURE);
}
}
for (int i = 0; i < wrk->num_procs; i++) {
int ret = pthread_join(wrk->procs[i].tid, NULL);
if (ret != 0) {
fprintf(stderr, "[worker_exec] Unable to join thread\n");
exit(EXIT_FAILURE);
}
}
}
|
