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##include "reactor.h"
reactor_t *
create_reactor() {
reactor_t *r = (reactor_t *)malloc(sizeof(*r));
r->epfd = epoll_create(1);
r->listenfd = 0;
r->stop = 0;
r->iter = 0;
r->events = (event_t*)malloc(sizeof(event_t)*MAX_CONN);
memset(r->events, 0, sizeof(event_t)*MAX_CONN);
memset(r->fire, 0, sizeof(struct epoll_event) * MAX_EVENT_NUM);
return r;
}
void
release_reactor(reactor_t * r) {
free(r->events);
close(r->epfd);
free(r);
}
static event_t *
_get_event_t(reactor_t *r) {
r->iter ++;
while (r->events[r->iter & MAX_CONN].fd > 0) {
r->iter++;
}
return &r->events[r->iter];
}
event_t *
new_event(reactor_t *R, int fd,
event_callback_fn rd,
event_callback_fn wt,
error_callback_fn err) {
assert(rd != 0 || wt != 0 || err != 0);
event_t *e = _get_event_t(R);
e->r = R;
e->fd = fd;
buffer_init(&e->in, 1024*16);
buffer_init(&e->out, 1024*16);
e->read_fn = rd;
e->write_fn = wt;
e->error_fn = err;
return e;
}
void
free_event(event_t *e) {
buffer_free(&e->in);
buffer_free(&e->out);
}
int
set_nonblock(int fd) {
int flag = fcntl(fd, F_GETFL, 0);
return fcntl(fd, F_SETFL, flag | O_NONBLOCK);
}
int
add_event(reactor_t *R, int events, event_t *e) {
struct epoll_event ev;
ev.events = events;
ev.data.ptr = e;
if (epoll_ctl(R->epfd, EPOLL_CTL_ADD, e->fd, &ev) == -1) {
printf("add event err fd = %d\n", e->fd);
return 1;
}
return 0;
}
int
del_event(reactor_t *R, event_t *e) {
epoll_ctl(R->epfd, EPOLL_CTL_DEL, e->fd, NULL);
free_event(e);
return 0;
}
int
enable_event(reactor_t *R, event_t *e, int readable, int writeable) {
struct epoll_event ev;
ev.events = (readable ? EPOLLIN : 0) | (writeable ? EPOLLOUT : 0);
ev.data.ptr = e;
if (epoll_ctl(R->epfd, EPOLL_CTL_MOD, e->fd, &ev) == -1) {
return 1;
}
return 0;
}
void
eventloop_once(reactor_t * r, int timeout) {
int n = epoll_wait(r->epfd, r->fire, MAX_EVENT_NUM, timeout);
for (int i = 0; i < n; i++) {
struct epoll_event *e = &r->fire[i];
int mask = e->events;
if (e->events & EPOLLERR) mask |= EPOLLIN | EPOLLOUT;
if (e->events & EPOLLHUP) mask |= EPOLLIN | EPOLLOUT;
event_t *et = (event_t*) e->data.ptr;
if (mask & EPOLLIN) {
if (et->read_fn)
et->read_fn(et->fd, EPOLLIN, et);
}
if (mask & EPOLLOUT) {
if (et->write_fn)
et->write_fn(et->fd, EPOLLOUT, et);
else {
uint8_t * buf = buffer_write_atmost(&et->out);
event_buffer_write(et, buf, buffer_len(&et->out));
}
}
}
}
void
stop_eventloop(reactor_t * r) {
r->stop = 1;
}
void
eventloop(reactor_t * r) {
while (!r->stop) {
eventloop_once(r, -1);
}
}
int
create_server(reactor_t *R, short port, event_callback_fn func) {
int listenfd = socket(AF_INET, SOCK_STREAM, 0);
if (listenfd < 0) {
printf("create listenfd error!\n");
return -1;
}
struct sockaddr_in addr;
memset(&addr, 0, sizeof(struct sockaddr_in));
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr.s_addr = INADDR_ANY;
int reuse = 1;
if (setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, (void *)&reuse, sizeof(int)) == -1) {
printf("reuse address error: %s\n", strerror(errno));
return -1;
}
if (bind(listenfd, (struct sockaddr*)&addr, sizeof(struct sockaddr_in)) < 0) {
printf("bind error %s\n", strerror(errno));
return -1;
}
if (listen(listenfd, 5) < 0) {
printf("listen error %s\n", strerror(errno));
return -1;
}
if (set_nonblock(listenfd) < 0) {
printf("set_nonblock error %s\n", strerror(errno));
return -1;
}
R->listenfd = listenfd;
event_t *e = new_event(R, listenfd, func, 0, 0);
add_event(R, EPOLLIN, e);
printf("listen port : %d\n", port);
return 0;
}
int
event_buffer_read(event_t *e) {
int fd = e->fd;
int num = 0;
while (1) {
char buf[1024] = {0};
int n = read(fd, buf, 1024);
if (n == 0) {
printf("close connection fd = %d\n", fd);
if (e->error_fn)
e->error_fn(fd, "close socket");
del_event(e->r, e);
close(fd);
return 0;
} else if (n < 0) {
if (errno == EINTR)
continue;
if (errno == EWOULDBLOCK)
break;
printf("read error fd = %d err = %s\n", fd, strerror(errno));
if (e->error_fn)
e->error_fn(fd, strerror(errno));
del_event(e->r, e);
close(fd);
return 0;
} else {
printf("recv data from client:%s", buf);
buffer_add(&e->in, buf, n);
}
num += n;
}
return num;
}
static int
_write_socket(event_t *e, void * buf, int sz) {
int fd = e->fd;
while (1) {
int n = write(fd, buf, sz);
if (n < 0) {
if (errno == EINTR)
continue;
if (errno == EWOULDBLOCK)
break;
if (e->error_fn)
e->error_fn(fd, strerror(errno));
del_event(e->r, e);
close(e->fd);
}
return n;
}
return 0;
}
int
event_buffer_write(event_t *e, void * buf, int sz) {
buffer_t *r = &e->out;
if (buffer_len(r) == 0) {
int n = _write_socket(e, buf, sz);
if (n == 0 || n < sz) {
buffer_add(&e->out, (char *)buf+n, sz-n);
enable_event(e->r, e, 1, 1);
return 0;
} else if (n < 0)
return 0;
return 1;
}
buffer_add(&e->out, (char *)buf, sz);
return 1;
}
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