X-Git-Url: http://git.pk910.de/?p=ChatPrototype.git;a=blobdiff_plain;f=SessionService%2Fsrc%2FIOEngine_kevent.c;fp=SessionService%2Fsrc%2FIOEngine_kevent.c;h=ee93f8645f09f63a25cb750df661d70b91c3d535;hp=0000000000000000000000000000000000000000;hb=b7b97486eb000081305e86486197351682386c06;hpb=5ad65e65d2234b02151ea7ca17e3fa9893a9b165
diff --git a/SessionService/src/IOEngine_kevent.c b/SessionService/src/IOEngine_kevent.c
new file mode 100644
index 0000000..ee93f86
--- /dev/null
+++ b/SessionService/src/IOEngine_kevent.c
@@ -0,0 +1,180 @@
+/* IOengine_kevent.c - IOMultiplexer
+ * Copyright (C) 2012 Philipp Kreil (pk910)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+#include "IOEngine.h"
+
+#ifdef HAVE_SYS_EVENT_H
+#include
+#include
+
+#define MAX_EVENTS 32
+
+static int kevent_fd;
+
+static int engine_kevent_init() {
+ kevent_fd = kqueue();
+ if (kevent_fd < 0)
+ return 0;
+ return 1;
+}
+
+static void engine_kevent_add(struct IODescriptor *iofd) {
+ if(iofd->type == IOTYPE_TIMER) return;
+ //add descriptor to the kevent queue
+ struct kevent changes[2];
+ int nchanges = 0;
+ int res;
+
+ EV_SET(&changes[nchanges++], iofd->fd, EVFILT_READ, EV_ADD, 0, 0, iofd);
+ if (iohandler_wants_writes(iofd))
+ EV_SET(&changes[nchanges++], iofd->fd, EVFILT_WRITE, EV_ADD, 0, 0, iofd);
+
+ res = kevent(kevent_fd, changes, nchanges, NULL, 0, NULL);
+ if(res < 0)
+ iohandler_log(IOLOG_ERROR, "could not add IODescriptor %d to kevent queue. (returned: %d)", res);
+}
+
+static void engine_kevent_remove(struct IODescriptor *iofd) {
+ if(iofd->type == IOTYPE_TIMER) return;
+ struct kevent changes[2];
+ int nchanges = 0;
+
+ EV_SET(&changes[nchanges++], iofd->fd, EVFILT_READ, EV_DELETE, 0, 0, iofd);
+ EV_SET(&changes[nchanges++], iofd->fd, EVFILT_WRITE, EV_DELETE, 0, 0, iofd);
+ kevent(kevent_fd, changes, nchanges, NULL, 0, NULL);
+}
+
+static void engine_kevent_update(struct IODescriptor *iofd) {
+ if(iofd->type == IOTYPE_TIMER) return;
+ if(iofd->state == IO_CLOSED) {
+ engine_kevent_remove(iofd);
+ return;
+ }
+ struct kevent changes[2];
+ int nchanges = 0;
+ int res;
+
+ EV_SET(&changes[nchanges++], iofd->fd, EVFILT_READ, EV_ADD, 0, 0, iofd);
+ EV_SET(&changes[nchanges++], iofd->fd, EVFILT_WRITE, iohandler_wants_writes(iofd) ? EV_ADD : EV_DELETE, 0, 0, iofd);
+
+ res = kevent(kevent_fd, changes, nchanges, NULL, 0, NULL);
+ if(res < 0) {
+ iohandler_log(IOLOG_ERROR, "could not update IODescriptor %d in kevent queue. (returned: %d)", res);
+ }
+}
+
+static void engine_kevent_loop(struct timeval *timeout) {
+ struct kevent events[MAX_EVENTS];
+ struct timeval now, tdiff;
+ struct timespec ts, *pts;
+ int msec;
+ int kevent_result;
+
+ gettimeofday(&now, NULL);
+
+ while(timer_priority) {
+ tdiff.tv_sec = timer_priority->timeout.tv_sec - now.tv_sec;
+ tdiff.tv_usec = timer_priority->timeout.tv_usec - now.tv_usec;
+ if(tdiff.tv_sec < 0 || (tdiff.tv_sec == 0 && tdiff.tv_usec <= 0)) {
+ if(timer_priority->constant_timeout) {
+ tdiff.tv_sec = 0;
+ iohandler_set_timeout(timer_priority, &tdiff);
+ iohandler_events(timer_priority, 0, 0);
+ } else {
+ iohandler_events(timer_priority, 0, 0);
+ iohandler_close(timer_priority); //also sets timer_priority to the next timed element
+ }
+ continue;
+ } else if(tdiff.tv_usec < 0) {
+ tdiff.tv_sec--;
+ tdiff.tv_usec += 1000000; //1 sec
+ }
+ if(timeval_is_smaler((&tdiff), timeout)) {
+ timeout->tv_sec = tdiff.tv_sec;
+ timeout->tv_usec = tdiff.tv_usec;
+ }
+ break;
+ }
+
+ if (timeout) {
+ ts.tv_sec = timeout->tv_sec;
+ ts.tv_nsec = timeout->tv_usec * 1000;
+ pts = &ts;
+ } else {
+ pts = NULL;
+ }
+
+ //select system call
+ kevent_result = kevent(kevent_fd, NULL, 0, events, MAX_EVENTS, pts);
+
+ if (kevent_result < 0) {
+ if (errno != EINTR) {
+ iohandler_log(IOLOG_FATAL, "kevent() failed with errno %d: %s", errno, strerror(errno));
+ return;
+ }
+ } else {
+ int i;
+ for(i = 0; i < kevent_result; i++)
+ iohandler_events(events[i].udata, (events[i].filter == EVFILT_READ), (events[i].filter == EVFILT_WRITE));
+ }
+
+ //check timers
+ while(timer_priority) {
+ tdiff.tv_sec = timer_priority->timeout.tv_sec - now.tv_sec;
+ tdiff.tv_usec = timer_priority->timeout.tv_usec - now.tv_usec;
+ if(tdiff.tv_sec < 0 || (tdiff.tv_sec == 0 && tdiff.tv_usec <= 0)) {
+ if(timer_priority->constant_timeout) {
+ tdiff.tv_sec = 0;
+ iohandler_set_timeout(timer_priority, &tdiff);
+ iohandler_events(timer_priority, 0, 0);
+ } else {
+ iohandler_events(timer_priority, 0, 0);
+ iohandler_close(timer_priority); //also sets timer_priority to the next timed element
+ }
+ continue;
+ }
+ break;
+ }
+
+}
+
+static void engine_kevent_cleanup() {
+ close(kevent_fd);
+}
+
+struct IOEngine engine_kevent = {
+ .name = "kevent",
+ .init = engine_kevent_init,
+ .add = engine_kevent_add,
+ .remove = engine_kevent_remove,
+ .update = engine_kevent_update,
+ .loop = engine_kevent_loop,
+ .cleanup = engine_kevent_cleanup,
+};
+
+#else
+
+struct IOEngine engine_kevent = {
+ .name = "kevent",
+ .init = NULL,
+ .add = NULL,
+ .remove = NULL,
+ .update = NULL,
+ .loop = NULL,
+ .cleanup = NULL,
+};
+
+#endif