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#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <pthread.h>
#include "fcntl.h"
#include "bitboard.h"
#include "moves.h"
#include "fen.h"
#include "uci.h"
#include "ipc.h"
struct thread_args {
int id;
int stop;
position_t position;
struct go_args *go_args;
struct engine_message *message;
};
void *engine_thread(void *_args) {
printf("NIGGGGA\n");
struct thread_args *args = (struct thread_args*)_args;
args->stop = 0;
int depth = 0;
while (true) {
struct engine_message *message = args->message;
message->depth = depth++;
message->multipv = args->id;
message->pv = comm_moves_init();
// pseudo engine work
for (volatile int k = 0; k < 1000000000; k++) {}
add_comm_move(&message->pv, (struct uci_move) { 14, 24 });
if (args->stop || !should_continue(message, args->go_args)) {
message->best_move = (struct uci_move) { 12, 24 };
message->ponder = (struct uci_move) { 42, 54 };
message->next = NULL;
message->ready = 1;
break;
}
message->next = malloc(sizeof(struct engine_message*));
message->next->ready = 0;
message->ready = 1;
args->message = message->next;
}
args->stop = 2;
}
struct threads {
pthread_t *threads;
struct thread_args* args;
struct go_args *go_args;
engine_messages *engine_messages;
size_t count;
size_t capacity;
position_t sharing_position;
};
void increase_threads(struct threads *threads, size_t change) {
int old_capacity = threads->capacity;
if (threads->count + change > threads->capacity) {
threads->capacity = threads->count + change + 16;
}
threads->threads = threads->threads == NULL
? malloc(sizeof(pthread_t) * threads->capacity)
: realloc(threads->threads, sizeof(pthread_t) * threads->capacity);
threads->args = threads->args == NULL
? malloc(sizeof(struct thread_args) * threads->capacity)
: realloc(threads->args, sizeof(struct thread_args) * threads->capacity);
threads->engine_messages->data = threads->engine_messages->data == NULL
? malloc(sizeof(struct engine_message*) * threads->capacity)
: realloc(
threads->engine_messages->data,
sizeof(struct engine_message*) * threads->capacity
);
for (int i = threads->count; i < threads->count + change; i++) {
threads->engine_messages->data[i] = malloc(sizeof(struct engine_message));
threads->engine_messages->data[i]->ready = 0;
threads->args[i] = (struct thread_args) {
i,
0,
threads->sharing_position,
threads->go_args,
threads->engine_messages->data[i],
};
pthread_create(
threads->threads + i,
NULL,
&engine_thread,
(void*)(threads->args + i)
);
}
threads->count += change;
threads->engine_messages->count = threads->count;
}
void decrease_threads(struct threads *threads, size_t change) {
for (int i = 0; i < change; i++) {
struct engine_message *item = threads->engine_messages->data[i];
threads->engine_messages->data[i] = NULL;
free(item);
pthread_cancel(threads->threads[threads->count - i - 1]);
}
threads->count -= change;
threads->engine_messages->count = threads->count;
}
void set_threads(struct threads *threads, size_t new_size) {
if (new_size >= threads->count) {
increase_threads(threads, new_size - threads->count);
} else {
decrease_threads(threads, threads->count - new_size);
}
}
void send_stop_signal(struct threads *threads) {
for (int i = 0; i < threads->count; i++) {
if (threads->args[i].stop) continue;
threads->args[i].stop = 1;
}
}
bool all_stopped(struct threads *threads) {
if (threads->count == 0) return false;
for (int i = 0; i < threads->count; i++) {
if (threads->args[i].stop == 2) continue;
return false;
}
return true;
}
// TODO: someday fix that some structs have typedef, some dont
int main(int argc, char** argv) {
comms *comms = malloc(sizeof(*comms));
comms->engine_messages = malloc(sizeof(*comms->engine_messages));
comms->engine_messages->data = NULL;
comms->uci_state_initialized = 0;
pthread_t uci_thread;
pthread_create(&uci_thread, NULL, &uci, (void*)comms);
while (atomic_load(&comms->uci_state_initialized) == 0);
comms->state.quit = 0;
struct threads engine_threads = {0};
engine_threads.engine_messages = comms->engine_messages;
while (1) {
if (atomic_load(&comms->state.quit)) break;
if (atomic_load(&comms->state.cleanup)) {
set_threads(&engine_threads, 0);
for (int i = 0; i < engine_threads.count; i++) {
engine_threads.args[i].stop = -1;
}
}
if (atomic_load(&comms->state.go)) {
printf("going\n");
engine_threads.sharing_position = comms->state.position;
engine_threads.go_args = (struct go_args*)comms->state.go_args;
set_threads(&engine_threads, comms->state.threads);
atomic_store(&comms->state.go, 0);
atomic_store(&comms->state.go_ready_receive, 1);
}
if (atomic_load(&comms->state.stop)) {
printf("stopping\n");
send_stop_signal(&engine_threads);
if (!all_stopped(&engine_threads)) continue;
set_threads(&engine_threads, 0);
for (int i = 0; i < engine_threads.count; i++) {
engine_threads.args[i].stop = -1;
}
atomic_store(&comms->state.stop, 0);
}
}
pthread_cancel(uci_thread);
set_threads(&engine_threads, 0);
free(engine_threads.threads);
free(engine_threads.args);
for (int i = 0; i < engine_threads.count; i++) {
free(engine_threads.engine_messages->data[i]);
}
free(comms->engine_messages->data);
free(comms->engine_messages);
free(comms);
return 0;
}
#include "engine/moves.c"
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