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#include "./worker.h"
#include "./net/client.h"
#include <pthread.h>
#include <stdint.h>
#include <stdlib.h>
typedef struct {
pthread_t tid;
} worker_proc_t;
typedef struct {
int id;
char* task;
size_t task_size;
} worker_task_t;
typedef struct {
conn_t* conn;
pthread_mutex_t mutex;
worker_task_t* tasks;
size_t task_ind;
size_t task_cnt;
int num_procs;
worker_proc_t* procs;
worker_func_t func;
} worker_t;
const int TASK_PRELOAD = 10;
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->tasks = calloc(TASK_PRELOAD, sizeof(*wrk->tasks));
wrk->procs = calloc(num_cpu, sizeof(*wrk->procs));
wrk->func = func;
wrk->num_procs = num_cpu;
pthread_mutex_init(&wrk->mutex, NULL);
}
worker_task_t load_task() {
char worker_buf[128];
if (wrk->task_cnt == -1U) {
return (worker_task_t) {.id = -1};
}
worker_task_t* task = NULL;
if (pthread_mutex_lock(&wrk->mutex) != 0) {
fprintf(stderr, "[proc_thread] Unable to call pthread_mutex_lock\n");
exit(EXIT_FAILURE);
}
if (wrk->task_cnt == -1U) {
goto ret;
}
if (wrk->task_cnt == wrk->task_ind) {
worker_buf[0] = REQUEST_TYPE_GET_TASK;
*((int32_t*) (worker_buf + 4)) = TASK_PRELOAD;
conn_write(wrk->conn, worker_buf, 8);
size_t size;
char* tasks = conn_read(wrk->conn, &size);
if (tasks == NULL) {
wrk->task_cnt = -1U;
goto ret;
}
wrk->task_cnt = *((int32_t*) tasks);
if (wrk->task_cnt <= 0U) {
wrk->task_cnt = -1U;
free(tasks);
goto ret;
}
size_t cur_ind = 4;
// divide tasks
for (size_t i = 0; i < wrk->task_cnt; i++) {
worker_task_t* task = &wrk->tasks[i];
task->id = *((int32_t*) (tasks + cur_ind));
cur_ind += 4;
task->task_size = *((int32_t*) (tasks + cur_ind));
cur_ind += 4;
task->task = calloc(task->task_size, sizeof(*task->task));
memcpy(task->task, tasks + cur_ind, task->task_size);
cur_ind += task->task_size;
}
free(tasks);
wrk->task_ind = 0;
}
if (wrk->task_cnt != -1U) {
task = &wrk->tasks[wrk->task_ind++];
}
ret:
if (pthread_mutex_unlock(&wrk->mutex) != 0) {
fprintf(stderr, "[proc_thread] Unable to call pthread_mutex_unlock\n");
exit(EXIT_FAILURE);
}
if (task == NULL) {
return (worker_task_t) {.id = -1};
}
return *task;
}
void* worker_proc_thread(void* args) {
args = (void*) args;
char worker_buf[1024 * 1024];
while (1) {
worker_task_t task = load_task();
if (task.id == -1) {
break;
}
char* resp;
size_t resp_size;
printf("%lx %lx %d\n", pthread_self(), (uintptr_t) task.task, task.id);
wrk->func(task.task, task.task_size, &resp, &resp_size);
printf("freed %lx %lx\n", pthread_self(), (uintptr_t) task.task);
free(task.task);
worker_buf[0] = REQUEST_TYPE_PUT_RESULT;
memcpy(worker_buf + 4, &task.id, 4);
memcpy(worker_buf + 16, resp, resp_size);
free(resp);
if (pthread_mutex_lock(&wrk->mutex) != 0) {
fprintf(stderr, "[proc_thread] Unable to call pthread_mutex_lock\n");
exit(EXIT_FAILURE);
}
conn_write(wrk->conn, worker_buf, resp_size + 16);
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);
}
printf("%lx thread id %d\n", proc->tid, i + 1);
}
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);
}
}
}
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