#include <string.h>
#include <fcntl.h>
#include <stdbool.h>
+#include <limits.h>
#include "uloop.h"
#include "utils.h"
static struct list_head timeouts = LIST_HEAD_INIT(timeouts);
static struct list_head processes = LIST_HEAD_INIT(processes);
-static int signal_fd = -1;
static int poll_fd = -1;
bool uloop_cancelled = false;
+bool uloop_handle_sigchld = true;
+static int uloop_status = 0;
static bool do_sigchld = false;
static struct uloop_fd_event cur_fds[ULOOP_MAX_EVENTS];
static int cur_fd, cur_nfds;
+static int uloop_run_depth = 0;
-static void uloop_handle_signal(int signo);
+int uloop_fd_add(struct uloop_fd *sock, unsigned int flags);
#ifdef USE_KQUEUE
#include "uloop-kqueue.c"
#include "uloop-epoll.c"
#endif
+static void waker_consume(struct uloop_fd *fd, unsigned int events)
+{
+ char buf[4];
+
+ while (read(fd->fd, buf, 4) > 0)
+ ;
+}
+
+static int waker_pipe = -1;
+static struct uloop_fd waker_fd = {
+ .fd = -1,
+ .cb = waker_consume,
+};
+
+static void waker_init_fd(int fd)
+{
+ fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
+ fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
+}
+
+static int waker_init(void)
+{
+ int fds[2];
+
+ if (waker_pipe >= 0)
+ return 0;
+
+ if (pipe(fds) < 0)
+ return -1;
+
+ waker_init_fd(fds[0]);
+ waker_init_fd(fds[1]);
+ waker_pipe = fds[1];
+
+ waker_fd.fd = fds[0];
+ waker_fd.cb = waker_consume;
+ uloop_fd_add(&waker_fd, ULOOP_READ);
+
+ return 0;
+}
+
+static void uloop_setup_signals(bool add);
+
+int uloop_init(void)
+{
+ if (uloop_init_pollfd() < 0)
+ return -1;
+
+ if (waker_init() < 0) {
+ uloop_done();
+ return -1;
+ }
+
+ uloop_setup_signals(true);
+
+ return 0;
+}
+
static bool uloop_fd_stack_event(struct uloop_fd *fd, int events)
{
struct uloop_fd_stack *cur;
return __uloop_fd_delete(fd);
}
-static int tv_diff(struct timeval *t1, struct timeval *t2)
+static int64_t tv_diff(struct timeval *t1, struct timeval *t2)
{
return
(t1->tv_sec - t2->tv_sec) * 1000 +
}
int uloop_timeout_remaining(struct uloop_timeout *timeout)
+{
+ int64_t td;
+ struct timeval now;
+
+ if (!timeout->pending)
+ return -1;
+
+ uloop_gettime(&now);
+
+ td = tv_diff(&timeout->time, &now);
+
+ if (td > INT_MAX)
+ return INT_MAX;
+ else if (td < INT_MIN)
+ return INT_MIN;
+ else
+ return (int)td;
+}
+
+int64_t uloop_timeout_remaining64(struct uloop_timeout *timeout)
{
struct timeval now;
while (1) {
pid = waitpid(-1, &ret, WNOHANG);
+ if (pid < 0 && errno == EINTR)
+ continue;
+
if (pid <= 0)
return;
}
-static void uloop_handle_signal(int signo)
+static void uloop_signal_wake(void)
{
- switch (signo) {
- case SIGINT:
- case SIGQUIT:
- case SIGTERM:
- uloop_cancelled = true;
+ do {
+ if (write(waker_pipe, "w", 1) < 0) {
+ if (errno == EINTR)
+ continue;
+ }
break;
- case SIGCHLD:
- do_sigchld = true;
- }
+ } while (1);
+}
+
+static void uloop_handle_sigint(int signo)
+{
+ uloop_status = signo;
+ uloop_cancelled = true;
+ uloop_signal_wake();
+}
+
+static void uloop_sigchld(int signo)
+{
+ do_sigchld = true;
+ uloop_signal_wake();
}
static void uloop_install_handler(int signum, void (*handler)(int), struct sigaction* old, bool add)
{
static struct sigaction old_sigint, old_sigchld, old_sigterm;
- if (uloop_setup_signalfd(add))
- return;
+ uloop_install_handler(SIGINT, uloop_handle_sigint, &old_sigint, add);
+ uloop_install_handler(SIGTERM, uloop_handle_sigint, &old_sigterm, add);
- uloop_install_handler(SIGINT, uloop_handle_signal, &old_sigint, add);
- uloop_install_handler(SIGTERM, uloop_handle_signal, &old_sigterm, add);
- uloop_install_handler(SIGQUIT, uloop_handle_signal, &old_sigterm, add);
- uloop_install_handler(SIGCHLD, uloop_handle_signal, &old_sigchld, add);
+ if (uloop_handle_sigchld)
+ uloop_install_handler(SIGCHLD, uloop_sigchld, &old_sigchld, add);
uloop_ignore_signal(SIGPIPE, add);
}
static int uloop_get_next_timeout(struct timeval *tv)
{
struct uloop_timeout *timeout;
- int diff;
+ int64_t diff;
if (list_empty(&timeouts))
return -1;
uloop_process_delete(p);
}
-void uloop_run(void)
+bool uloop_cancelling(void)
+{
+ return uloop_run_depth > 0 && uloop_cancelled;
+}
+
+int uloop_run_timeout(int timeout)
{
- static int recursive_calls = 0;
+ int next_time = 0;
struct timeval tv;
- /*
- * Handlers are only updated for the first call to uloop_run() (and restored
- * when this call is done).
- */
- if (!recursive_calls++)
- uloop_setup_signals(true);
+ uloop_run_depth++;
+ uloop_status = 0;
uloop_cancelled = false;
- while(!uloop_cancelled)
+ while (!uloop_cancelled)
{
uloop_gettime(&tv);
uloop_process_timeouts(&tv);
break;
uloop_gettime(&tv);
- uloop_run_events(uloop_get_next_timeout(&tv));
+
+ next_time = uloop_get_next_timeout(&tv);
+ if (timeout >= 0 && timeout < next_time)
+ next_time = timeout;
+ uloop_run_events(next_time);
}
- if (!--recursive_calls)
- uloop_setup_signals(false);
+ --uloop_run_depth;
+
+ return uloop_status;
}
void uloop_done(void)
{
- if (signal_fd >= 0) {
- close(signal_fd);
- signal_fd = -1;
- }
+ uloop_setup_signals(false);
- if (poll_fd < 0)
- return;
+ if (poll_fd >= 0) {
+ close(poll_fd);
+ poll_fd = -1;
+ }
- close(poll_fd);
- poll_fd = -1;
+ if (waker_pipe >= 0) {
+ uloop_fd_delete(&waker_fd);
+ close(waker_pipe);
+ close(waker_fd.fd);
+ waker_pipe = -1;
+ }
uloop_clear_timeouts();
uloop_clear_processes();