#include <sys/time.h>
#include <sys/types.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <poll.h>
+#include <string.h>
+#include <fcntl.h>
+#include <stdbool.h>
+
#include "uloop.h"
#ifdef USE_KQUEUE
#ifdef USE_EPOLL
#include <sys/epoll.h>
#endif
+#include <sys/wait.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <poll.h>
-#include <string.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <stdbool.h>
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#endif
#define ULOOP_MAX_EVENTS 10
-struct uloop_timeout *first_timeout;
-static int poll_fd;
+static struct list_head timeouts = LIST_HEAD_INIT(timeouts);
+static struct list_head processes = LIST_HEAD_INIT(processes);
+
+static int poll_fd = -1;
bool uloop_cancelled = false;
+bool uloop_handle_sigchld = true;
+static bool do_sigchld = false;
+static int cur_fd, cur_nfds;
#ifdef USE_KQUEUE
int uloop_init(void)
{
+ if (poll_fd >= 0)
+ return 0;
+
poll_fd = kqueue();
if (poll_fd < 0)
return -1;
return kflags;
}
+static struct kevent events[ULOOP_MAX_EVENTS];
+
static int register_poll(struct uloop_fd *fd, unsigned int flags)
{
struct timespec timeout = { 0, 0 };
struct kevent ev[2];
unsigned int changed;
int nev = 0;
+ unsigned int fl = 0;
changed = fd->kqflags ^ flags;
if (changed & ULOOP_EDGE_TRIGGER)
EV_SET(&ev[nev++], fd->fd, EVFILT_WRITE, kflags, 0, 0, fd);
}
- if (nev && (kevent(poll_fd, ev, nev, NULL, 0, &timeout) == -1))
+ if (!flags)
+ fl |= EV_DELETE;
+
+ if (nev && (kevent(poll_fd, ev, nev, NULL, fl, &timeout) == -1))
return -1;
fd->kqflags = flags;
int uloop_fd_delete(struct uloop_fd *sock)
{
+ int i;
+
+ for (i = cur_fd + 1; i < cur_nfds; i++) {
+ if (events[i].udata != sock)
+ continue;
+
+ events[i].udata = NULL;
+ }
+
sock->registered = false;
return register_poll(sock, 0);
}
static void uloop_run_events(int timeout)
{
- struct kevent events[ULOOP_MAX_EVENTS];
struct timespec ts;
int nfds, n;
if (timeout > 0) {
ts.tv_sec = timeout / 1000;
- ts.tv_nsec = timeout * 1000000;
+ ts.tv_nsec = (timeout % 1000) * 1000000;
}
nfds = kevent(poll_fd, NULL, 0, events, ARRAY_SIZE(events), timeout > 0 ? &ts : NULL);
struct uloop_fd *u = events[n].udata;
unsigned int ev = 0;
- if(events[n].flags & EV_ERROR) {
+ if (!u)
+ continue;
+
+ if (events[n].flags & EV_ERROR) {
u->error = true;
uloop_fd_delete(u);
}
else if (events[n].filter == EVFILT_WRITE)
ev |= ULOOP_WRITE;
- if(events[n].flags & EV_EOF)
+ if (events[n].flags & EV_EOF)
u->eof = true;
else if (!ev)
continue;
- if(u->cb)
+ if (u->cb) {
+ cur_fd = n;
+ cur_nfds = nfds;
u->cb(u, ev);
+ }
}
+ cur_nfds = 0;
}
#endif
int uloop_init(void)
{
+ if (poll_fd >= 0)
+ return 0;
+
poll_fd = epoll_create(32);
if (poll_fd < 0)
return -1;
return epoll_ctl(poll_fd, op, fd->fd, &ev);
}
+static struct epoll_event events[ULOOP_MAX_EVENTS];
+
int uloop_fd_delete(struct uloop_fd *sock)
{
+ int i;
+
+ for (i = cur_fd + 1; i < cur_nfds; i++) {
+ if (events[i].data.ptr != sock)
+ continue;
+
+ events[i].data.ptr = NULL;
+ }
sock->registered = false;
return epoll_ctl(poll_fd, EPOLL_CTL_DEL, sock->fd, 0);
}
static void uloop_run_events(int timeout)
{
- struct epoll_event events[ULOOP_MAX_EVENTS];
- int nfds, n;
+ int n, nfds;
nfds = epoll_wait(poll_fd, events, ARRAY_SIZE(events), timeout);
for(n = 0; n < nfds; ++n)
struct uloop_fd *u = events[n].data.ptr;
unsigned int ev = 0;
- if(events[n].events & EPOLLERR) {
+ if (!u)
+ continue;
+
+ if(events[n].events & (EPOLLERR|EPOLLHUP)) {
u->error = true;
uloop_fd_delete(u);
}
- if(!(events[n].events & (EPOLLRDHUP|EPOLLIN|EPOLLOUT|EPOLLERR)))
+ if(!(events[n].events & (EPOLLRDHUP|EPOLLIN|EPOLLOUT|EPOLLERR|EPOLLHUP)))
continue;
if(events[n].events & EPOLLRDHUP)
if(events[n].events & EPOLLOUT)
ev |= ULOOP_WRITE;
- if(u->cb)
+ if(u->cb) {
+ cur_fd = n;
+ cur_nfds = nfds;
u->cb(u, ev);
+ }
}
+ cur_nfds = 0;
}
#endif
int uloop_timeout_add(struct uloop_timeout *timeout)
{
- struct uloop_timeout **head = &first_timeout;
- struct uloop_timeout *prev = NULL;
+ struct uloop_timeout *tmp;
+ struct list_head *h = &timeouts;
if (timeout->pending)
return -1;
- while (*head) {
- if (tv_diff(&(*head)->time, &timeout->time) > 0)
+ list_for_each_entry(tmp, &timeouts, list) {
+ if (tv_diff(&tmp->time, &timeout->time) > 0) {
+ h = &tmp->list;
break;
-
- prev = *head;
- head = &(*head)->next;
+ }
}
- timeout->prev = prev;
- timeout->next = *head;
- if (timeout->next)
- timeout->next->prev = timeout;
- *head = timeout;
+ list_add_tail(&timeout->list, h);
timeout->pending = true;
return 0;
gettimeofday(&timeout->time, NULL);
time->tv_sec += msecs / 1000;
- time->tv_usec += msecs % 1000;
+ time->tv_usec += (msecs % 1000) * 1000;
if (time->tv_usec > 1000000) {
time->tv_sec++;
if (!timeout->pending)
return -1;
- if (timeout->prev)
- timeout->prev->next = timeout->next;
- else
- first_timeout = timeout->next;
+ list_del(&timeout->list);
+ timeout->pending = false;
- if (timeout->next)
- timeout->next->prev = timeout->prev;
+ return 0;
+}
- timeout->pending = false;
+int uloop_process_add(struct uloop_process *p)
+{
+ struct uloop_process *tmp;
+ struct list_head *h = &processes;
+
+ if (p->pending)
+ return -1;
+
+ list_for_each_entry(tmp, &processes, list) {
+ if (tmp->pid > p->pid) {
+ h = &tmp->list;
+ break;
+ }
+ }
+
+ list_add_tail(&p->list, h);
+ p->pending = true;
return 0;
}
+int uloop_process_delete(struct uloop_process *p)
+{
+ if (!p->pending)
+ return -1;
+
+ list_del(&p->list);
+ p->pending = false;
+
+ return 0;
+}
+
+static void uloop_handle_processes(void)
+{
+ struct uloop_process *p, *tmp;
+ pid_t pid;
+ int ret;
+
+ do_sigchld = false;
+
+ while (1) {
+ pid = waitpid(-1, &ret, WNOHANG);
+ if (pid <= 0)
+ return;
+
+ list_for_each_entry_safe(p, tmp, &processes, list) {
+ if (p->pid < pid)
+ continue;
+
+ if (p->pid > pid)
+ break;
+
+ uloop_process_delete(p);
+ p->cb(p, ret);
+ }
+ }
+
+}
+
static void uloop_handle_sigint(int signo)
{
uloop_cancelled = true;
}
+static void uloop_sigchld(int signo)
+{
+ do_sigchld = true;
+}
+
static void uloop_setup_signals(void)
{
struct sigaction s;
+
memset(&s, 0, sizeof(struct sigaction));
s.sa_handler = uloop_handle_sigint;
s.sa_flags = 0;
sigaction(SIGINT, &s, NULL);
+
+ if (uloop_handle_sigchld) {
+ s.sa_handler = uloop_sigchld;
+ sigaction(SIGCHLD, &s, NULL);
+ }
}
static int uloop_get_next_timeout(struct timeval *tv)
{
+ struct uloop_timeout *timeout;
int diff;
- if (!first_timeout)
+ if (list_empty(&timeouts))
return -1;
- diff = tv_diff(&first_timeout->time, tv);
+ timeout = list_first_entry(&timeouts, struct uloop_timeout, list);
+ diff = tv_diff(&timeout->time, tv);
if (diff < 0)
return 0;
static void uloop_process_timeouts(struct timeval *tv)
{
- struct uloop_timeout *timeout;
+ struct uloop_timeout *t;
- while (first_timeout) {
- if (tv_diff(&first_timeout->time, tv) > 0)
+ while (!list_empty(&timeouts)) {
+ t = list_first_entry(&timeouts, struct uloop_timeout, list);
+
+ if (tv_diff(&t->time, tv) > 0)
break;
- timeout = first_timeout;
- uloop_timeout_cancel(timeout);
- if (timeout->cb)
- timeout->cb(timeout);
+ uloop_timeout_cancel(t);
+ if (t->cb)
+ t->cb(t);
}
}
+static void uloop_clear_timeouts(void)
+{
+ struct uloop_timeout *t, *tmp;
+
+ list_for_each_entry_safe(t, tmp, &timeouts, list)
+ uloop_timeout_cancel(t);
+}
+
+static void uloop_clear_processes(void)
+{
+ struct uloop_process *p, *tmp;
+
+ list_for_each_entry_safe(p, tmp, &processes, list)
+ uloop_process_delete(p);
+}
+
void uloop_run(void)
{
struct timeval tv;
{
gettimeofday(&tv, NULL);
uloop_process_timeouts(&tv);
+ if (uloop_cancelled)
+ break;
+
+ if (do_sigchld)
+ uloop_handle_processes();
uloop_run_events(uloop_get_next_timeout(&tv));
}
}
void uloop_done(void)
{
+ if (poll_fd < 0)
+ return;
+
close(poll_fd);
+ poll_fd = -1;
+
+ uloop_clear_timeouts();
+ uloop_clear_processes();
}
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