/*************************************************************************
* (C) 2011 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
* by Michael Pounov <misho@openbsd-bg.org>
*
* $Author: misho $
* $Id: hooks.c,v 1.24 2013/11/14 21:37:27 misho Exp $
*
**************************************************************************
The ELWIX and AITNET software is distributed under the following
terms:
All of the documentation and software included in the ELWIX and AITNET
Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
by Michael Pounov <misho@elwix.org>. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by Michael Pounov <misho@elwix.org>
ELWIX - Embedded LightWeight unIX and its contributors.
4. Neither the name of AITNET nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
*/
#include "global.h"
#include "hooks.h"
/*
* sched_hook_init() - Default INIT hook
*
* @root = root task
* @arg = unused
* return: <0 errors and 0 ok
*/
void *
sched_hook_init(void *root, void *arg __unused)
{
sched_root_task_t *r = root;
if (!r)
return (void*) -1;
r->root_kq = kqueue();
if (r->root_kq == -1) {
LOGERR;
return (void*) -1;
}
return NULL;
}
/*
* sched_hook_fini() - Default FINI hook
*
* @root = root task
* @arg = unused
* return: <0 errors and 0 ok
*/
void *
sched_hook_fini(void *root, void *arg __unused)
{
sched_root_task_t *r = root;
if (!r)
return (void*) -1;
if (r->root_kq > 2) {
close(r->root_kq);
r->root_kq = 0;
}
return NULL;
}
/*
* sched_hook_cancel() - Default CANCEL hook
*
* @task = current task
* @arg = unused
* return: <0 errors and 0 ok
*/
void *
sched_hook_cancel(void *task, void *arg __unused)
{
sched_task_t *t = task;
struct kevent chg[1];
struct timespec timeout = { 0, 0 };
#ifdef AIO_SUPPORT
struct aiocb *acb;
#ifdef EVFILT_LIO
register int i = 0;
struct aiocb **acbs;
#endif /* EVFILT_LIO */
#endif /* AIO_SUPPORT */
if (!t || !TASK_ROOT(t))
return (void*) -1;
switch (TASK_TYPE(t)) {
case taskREAD:
#ifdef __NetBSD__
EV_SET(&chg[0], TASK_FD(t), EVFILT_READ, EV_DELETE, 0, 0, (intptr_t) TASK_FD(t));
#else
EV_SET(&chg[0], TASK_FD(t), EVFILT_READ, EV_DELETE, 0, 0, (void*) TASK_FD(t));
#endif
break;
case taskWRITE:
#ifdef __NetBSD__
EV_SET(&chg[0], TASK_FD(t), EVFILT_WRITE, EV_DELETE, 0, 0, (intptr_t) TASK_FD(t));
#else
EV_SET(&chg[0], TASK_FD(t), EVFILT_WRITE, EV_DELETE, 0, 0, (void*) TASK_FD(t));
#endif
break;
case taskALARM:
#ifdef __NetBSD__
EV_SET(&chg[0], (uintptr_t) TASK_DATA(t), EVFILT_TIMER, EV_DELETE,
0, 0, (intptr_t) TASK_DATA(t));
#else
EV_SET(&chg[0], (uintptr_t) TASK_DATA(t), EVFILT_TIMER, EV_DELETE,
0, 0, (void*) TASK_DATA(t));
#endif
break;
case taskNODE:
#ifdef __NetBSD__
EV_SET(&chg[0], TASK_FD(t), EVFILT_VNODE, EV_DELETE, 0, 0, (intptr_t) TASK_FD(t));
#else
EV_SET(&chg[0], TASK_FD(t), EVFILT_VNODE, EV_DELETE, 0, 0, (void*) TASK_FD(t));
#endif
break;
case taskPROC:
#ifdef __NetBSD__
EV_SET(&chg[0], TASK_VAL(t), EVFILT_PROC, EV_DELETE, 0, 0, (intptr_t) TASK_VAL(t));
#else
EV_SET(&chg[0], TASK_VAL(t), EVFILT_PROC, EV_DELETE, 0, 0, (void*) TASK_VAL(t));
#endif
break;
case taskSIGNAL:
#ifdef __NetBSD__
EV_SET(&chg[0], TASK_VAL(t), EVFILT_SIGNAL, EV_DELETE, 0, 0, (intptr_t) TASK_VAL(t));
#else
EV_SET(&chg[0], TASK_VAL(t), EVFILT_SIGNAL, EV_DELETE, 0, 0, (void*) TASK_VAL(t));
#endif
/* restore signal */
signal(TASK_VAL(t), SIG_DFL);
break;
#ifdef AIO_SUPPORT
case taskAIO:
#ifdef __NetBSD__
EV_SET(&chg[0], TASK_VAL(t), EVFILT_AIO, EV_DELETE, 0, 0, (intptr_t) TASK_VAL(t));
#else
EV_SET(&chg[0], TASK_VAL(t), EVFILT_AIO, EV_DELETE, 0, 0, (void*) TASK_VAL(t));
#endif
acb = (struct aiocb*) TASK_VAL(t);
if (acb) {
if (aio_cancel(acb->aio_fildes, acb) == AIO_CANCELED)
aio_return(acb);
free(acb);
TASK_VAL(t) = 0;
}
break;
#ifdef EVFILT_LIO
case taskLIO:
#ifdef __NetBSD__
EV_SET(&chg[0], TASK_VAL(t), EVFILT_LIO, EV_DELETE, 0, 0, (intptr_t) TASK_VAL(t));
#else
EV_SET(&chg[0], TASK_VAL(t), EVFILT_LIO, EV_DELETE, 0, 0, (void*) TASK_VAL(t));
#endif
acbs = (struct aiocb**) TASK_VAL(t);
if (acbs) {
for (i = 0; i < TASK_DATLEN(t); i++) {
if (aio_cancel(acbs[i]->aio_fildes, acbs[i]) == AIO_CANCELED)
aio_return(acbs[i]);
free(acbs[i]);
}
free(acbs);
TASK_VAL(t) = 0;
}
break;
#endif /* EVFILT_LIO */
#endif /* AIO_SUPPORT */
#ifdef EVFILT_USER
case taskUSER:
#ifdef __NetBSD__
EV_SET(&chg[0], TASK_VAL(t), EVFILT_USER, EV_DELETE, 0, 0, (intptr_t) TASK_VAL(t));
#else
EV_SET(&chg[0], TASK_VAL(t), EVFILT_USER, EV_DELETE, 0, 0, (void*) TASK_VAL(t));
#endif
break;
#endif /* EVFILT_USER */
case taskTHREAD:
#ifdef HAVE_LIBPTHREAD
pthread_cancel((pthread_t) TASK_VAL(t));
#endif
return NULL;
#if defined(HAVE_TIMER_CREATE) && defined(HAVE_TIMER_SETTIME)
case taskRTC:
timer_delete((timer_t) TASK_FLAG(t));
schedCancel((sched_task_t*) TASK_RET(t));
return NULL;
#endif /* HAVE_TIMER_CREATE */
default:
return NULL;
}
kevent(TASK_ROOT(t)->root_kq, chg, 1, NULL, 0, &timeout);
return NULL;
}
#ifdef HAVE_LIBPTHREAD
/*
* sched_hook_thread() - Default THREAD hook
*
* @task = current task
* @arg = pthread attributes
* return: <0 errors and 0 ok
*/
void *
sched_hook_thread(void *task, void *arg)
{
sched_task_t *t = task;
pthread_t tid;
sigset_t s, o;
if (!t || !TASK_ROOT(t))
return (void*) -1;
sigfillset(&s);
pthread_sigmask(SIG_BLOCK, &s, &o);
if ((errno = pthread_create(&tid, (pthread_attr_t*) arg,
(void *(*)(void*)) _sched_threadWrapper, t))) {
LOGERR;
pthread_sigmask(SIG_SETMASK, &o, NULL);
return (void*) -1;
} else
TASK_VAL(t) = (u_long) tid;
if (!TASK_ISLOCKED(t))
TASK_LOCK(t);
pthread_sigmask(SIG_SETMASK, &o, NULL);
return NULL;
}
#endif
/*
* sched_hook_read() - Default READ hook
*
* @task = current task
* @arg = unused
* return: <0 errors and 0 ok
*/
void *
sched_hook_read(void *task, void *arg __unused)
{
sched_task_t *t = task;
struct kevent chg[1];
struct timespec timeout = { 0, 0 };
if (!t || !TASK_ROOT(t))
return (void*) -1;
#ifdef __NetBSD__
EV_SET(&chg[0], TASK_FD(t), EVFILT_READ, EV_ADD | EV_CLEAR, 0, 0, (intptr_t) TASK_FD(t));
#else
EV_SET(&chg[0], TASK_FD(t), EVFILT_READ, EV_ADD | EV_CLEAR, 0, 0, (void*) TASK_FD(t));
#endif
if (kevent(TASK_ROOT(t)->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
else
LOGERR;
return (void*) -1;
}
return NULL;
}
/*
* sched_hook_write() - Default WRITE hook
*
* @task = current task
* @arg = unused
* return: <0 errors and 0 ok
*/
void *
sched_hook_write(void *task, void *arg __unused)
{
sched_task_t *t = task;
struct kevent chg[1];
struct timespec timeout = { 0, 0 };
if (!t || !TASK_ROOT(t))
return (void*) -1;
#ifdef __NetBSD__
EV_SET(&chg[0], TASK_FD(t), EVFILT_WRITE, EV_ADD | EV_CLEAR, 0, 0, (intptr_t) TASK_FD(t));
#else
EV_SET(&chg[0], TASK_FD(t), EVFILT_WRITE, EV_ADD | EV_CLEAR, 0, 0, (void*) TASK_FD(t));
#endif
if (kevent(TASK_ROOT(t)->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
else
LOGERR;
return (void*) -1;
}
return NULL;
}
/*
* sched_hook_alarm() - Default ALARM hook
*
* @task = current task
* @arg = unused
* return: <0 errors and 0 ok
*/
void *
sched_hook_alarm(void *task, void *arg __unused)
{
sched_task_t *t = task;
struct kevent chg[1];
struct timespec timeout = { 0, 0 };
if (!t || !TASK_ROOT(t))
return (void*) -1;
#ifdef __NetBSD__
EV_SET(&chg[0], (uintptr_t) TASK_DATA(t), EVFILT_TIMER, EV_ADD | EV_CLEAR, 0,
t->task_val.ts.tv_sec * 1000 + t->task_val.ts.tv_nsec / 1000000,
(intptr_t) TASK_DATA(t));
#else
EV_SET(&chg[0], (uintptr_t) TASK_DATA(t), EVFILT_TIMER, EV_ADD | EV_CLEAR, 0,
t->task_val.ts.tv_sec * 1000 + t->task_val.ts.tv_nsec / 1000000,
(void*) TASK_DATA(t));
#endif
if (kevent(TASK_ROOT(t)->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
else
LOGERR;
return (void*) -1;
}
return NULL;
}
/*
* sched_hook_node() - Default NODE hook
*
* @task = current task
* @arg = unused
* return: <0 errors and 0 ok
*/
void *
sched_hook_node(void *task, void *arg __unused)
{
sched_task_t *t = task;
struct kevent chg[1];
struct timespec timeout = { 0, 0 };
if (!t || !TASK_ROOT(t))
return (void*) -1;
#ifdef __NetBSD__
EV_SET(&chg[0], TASK_FD(t), EVFILT_VNODE, EV_ADD | EV_CLEAR,
NOTE_DELETE | NOTE_WRITE | NOTE_EXTEND | NOTE_ATTRIB |
NOTE_LINK | NOTE_RENAME | NOTE_REVOKE, 0, (intptr_t) TASK_FD(t));
#else
EV_SET(&chg[0], TASK_FD(t), EVFILT_VNODE, EV_ADD | EV_CLEAR,
NOTE_DELETE | NOTE_WRITE | NOTE_EXTEND | NOTE_ATTRIB |
NOTE_LINK | NOTE_RENAME | NOTE_REVOKE, 0, (void*) TASK_FD(t));
#endif
if (kevent(TASK_ROOT(t)->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
else
LOGERR;
return (void*) -1;
}
return NULL;
}
/*
* sched_hook_proc() - Default PROC hook
*
* @task = current task
* @arg = unused
* return: <0 errors and 0 ok
*/
void *
sched_hook_proc(void *task, void *arg __unused)
{
sched_task_t *t = task;
struct kevent chg[1];
struct timespec timeout = { 0, 0 };
if (!t || !TASK_ROOT(t))
return (void*) -1;
#ifdef __NetBSD__
EV_SET(&chg[0], TASK_VAL(t), EVFILT_PROC, EV_ADD | EV_CLEAR,
NOTE_EXIT | NOTE_FORK | NOTE_EXEC | NOTE_TRACK, 0, (intptr_t) TASK_VAL(t));
#else
EV_SET(&chg[0], TASK_VAL(t), EVFILT_PROC, EV_ADD | EV_CLEAR,
NOTE_EXIT | NOTE_FORK | NOTE_EXEC | NOTE_TRACK, 0, (void*) TASK_VAL(t));
#endif
if (kevent(TASK_ROOT(t)->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
else
LOGERR;
return (void*) -1;
}
return NULL;
}
/*
* sched_hook_signal() - Default SIGNAL hook
*
* @task = current task
* @arg = unused
* return: <0 errors and 0 ok
*/
void *
sched_hook_signal(void *task, void *arg __unused)
{
sched_task_t *t = task;
struct kevent chg[1];
struct timespec timeout = { 0, 0 };
if (!t || !TASK_ROOT(t))
return (void*) -1;
/* ignore signal */
signal(TASK_VAL(t), SIG_IGN);
#ifdef __NetBSD__
EV_SET(&chg[0], TASK_VAL(t), EVFILT_SIGNAL, EV_ADD | EV_CLEAR, 0, 0, (intptr_t) TASK_VAL(t));
#else
EV_SET(&chg[0], TASK_VAL(t), EVFILT_SIGNAL, EV_ADD | EV_CLEAR, 0, 0, (void*) TASK_VAL(t));
#endif
if (kevent(TASK_ROOT(t)->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
else
LOGERR;
return (void*) -1;
}
return NULL;
}
/*
* sched_hook_user() - Default USER hook
*
* @task = current task
* @arg = unused
* return: <0 errors and 0 ok
*/
#ifdef EVFILT_USER
void *
sched_hook_user(void *task, void *arg __unused)
{
sched_task_t *t = task;
struct kevent chg[1];
struct timespec timeout = { 0, 0 };
if (!t || !TASK_ROOT(t))
return (void*) -1;
#ifdef __NetBSD__
EV_SET(&chg[0], TASK_VAL(t), EVFILT_USER, EV_ADD | EV_CLEAR, TASK_DATLEN(t),
0, (intptr_t) TASK_VAL(t));
#else
EV_SET(&chg[0], TASK_VAL(t), EVFILT_USER, EV_ADD | EV_CLEAR, TASK_DATLEN(t),
0, (void*) TASK_VAL(t));
#endif
if (kevent(TASK_ROOT(t)->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
else
LOGERR;
return (void*) -1;
}
return NULL;
}
#endif
/*
* sched_hook_fetch() - Default FETCH hook
*
* @root = root task
* @arg = unused
* return: NULL error or !=NULL fetched task
*/
void *
sched_hook_fetch(void *root, void *arg __unused)
{
sched_root_task_t *r = root;
sched_task_t *task, *tmp;
struct timespec now, m, mtmp;
struct timespec *timeout;
struct kevent evt[1], res[KQ_EVENTS];
register int i, flg;
int en;
#ifdef AIO_SUPPORT
int len, fd;
struct aiocb *acb;
#ifdef EVFILT_LIO
int l;
register int j;
off_t off;
struct aiocb **acbs;
struct iovec *iv;
#endif /* EVFILT_LIO */
#endif /* AIO_SUPPORT */
if (!r)
return NULL;
/* get new task by queue priority */
while ((task = TAILQ_FIRST(&r->root_event))) {
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskEVENT]);
#endif
TAILQ_REMOVE(&r->root_event, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskEVENT]);
#endif
task->task_type = taskUNUSE;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskUNUSE]);
#endif
TAILQ_INSERT_TAIL(&r->root_unuse, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskUNUSE]);
#endif
return task;
}
while ((task = TAILQ_FIRST(&r->root_ready))) {
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskREADY]);
#endif
TAILQ_REMOVE(&r->root_ready, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskREADY]);
#endif
task->task_type = taskUNUSE;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskUNUSE]);
#endif
TAILQ_INSERT_TAIL(&r->root_unuse, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskUNUSE]);
#endif
return task;
}
#ifdef TIMER_WITHOUT_SORT
clock_gettime(CLOCK_MONOTONIC, &now);
sched_timespecclear(&r->root_wait);
TAILQ_FOREACH(task, &r->root_timer, task_node) {
if (!sched_timespecisset(&r->root_wait))
r->root_wait = TASK_TS(task);
else if (sched_timespeccmp(&TASK_TS(task), &r->root_wait, -) < 0)
r->root_wait = TASK_TS(task);
}
if (TAILQ_FIRST(&r->root_timer)) {
m = r->root_wait;
sched_timespecsub(&m, &now, &mtmp);
r->root_wait = mtmp;
} else {
/* set wait INFTIM */
sched_timespecinf(&r->root_wait);
}
#else
if (!TAILQ_FIRST(&r->root_task) && (task = TAILQ_FIRST(&r->root_timer))) {
clock_gettime(CLOCK_MONOTONIC, &now);
m = TASK_TS(task);
sched_timespecsub(&m, &now, &mtmp);
r->root_wait = mtmp;
} else {
/* set wait INFTIM */
sched_timespecinf(&r->root_wait);
}
#endif
/* if present member of task, set NOWAIT */
if (TAILQ_FIRST(&r->root_task))
sched_timespecclear(&r->root_wait);
if (r->root_wait.tv_sec != -1 && r->root_wait.tv_nsec != -1)
timeout = &r->root_wait;
else if (sched_timespecisinf(&r->root_poll))
timeout = NULL;
else
timeout = &r->root_poll;
if ((en = kevent(r->root_kq, NULL, 0, res, KQ_EVENTS, timeout)) == -1) {
if (r->root_hooks.hook_exec.exception) {
if (r->root_hooks.hook_exec.exception(r, NULL))
return NULL;
} else if (errno != EINTR)
LOGERR;
goto skip_event;
}
/* kevent dispatcher */
now.tv_sec = now.tv_nsec = 0;
/* Go and catch the cat into pipes ... */
for (i = 0; i < en; i++) {
memcpy(evt, &res[i], sizeof evt);
evt->flags = EV_DELETE;
/* Put read/write task to ready queue */
switch (res[i].filter) {
case EVFILT_READ:
flg = 0;
TAILQ_FOREACH_SAFE(task, &r->root_read, task_node, tmp) {
if (TASK_FD(task) != ((intptr_t) res[i].udata))
continue;
else {
flg++;
TASK_RET(task) = res[i].data;
TASK_FLAG(task) = (u_long) res[i].fflags;
}
/* remove read handle */
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskREAD]);
#endif
TAILQ_REMOVE(&r->root_read, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskREAD]);
#endif
if (r->root_hooks.hook_exec.exception && res[i].flags & EV_EOF) {
if (r->root_hooks.hook_exec.exception(r, (void*) EV_EOF)) {
task->task_type = taskUNUSE;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskUNUSE]);
#endif
TAILQ_INSERT_TAIL(&r->root_unuse, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskUNUSE]);
#endif
} else {
task->task_type = taskREADY;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskREADY]);
#endif
TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskREADY]);
#endif
}
} else {
task->task_type = taskREADY;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskREADY]);
#endif
TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskREADY]);
#endif
}
}
/* if match at least 2, don't remove resouce of event */
if (flg > 1)
evt->flags ^= evt->flags;
break;
case EVFILT_WRITE:
flg = 0;
TAILQ_FOREACH_SAFE(task, &r->root_write, task_node, tmp) {
if (TASK_FD(task) != ((intptr_t) res[i].udata))
continue;
else {
flg++;
TASK_RET(task) = res[i].data;
TASK_FLAG(task) = (u_long) res[i].fflags;
}
/* remove write handle */
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskWRITE]);
#endif
TAILQ_REMOVE(&r->root_write, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskWRITE]);
#endif
if (r->root_hooks.hook_exec.exception && res[i].flags & EV_EOF) {
if (r->root_hooks.hook_exec.exception(r, (void*) EV_EOF)) {
task->task_type = taskUNUSE;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskUNUSE]);
#endif
TAILQ_INSERT_TAIL(&r->root_unuse, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskUNUSE]);
#endif
} else {
task->task_type = taskREADY;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskREADY]);
#endif
TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskREADY]);
#endif
}
} else {
task->task_type = taskREADY;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskREADY]);
#endif
TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskREADY]);
#endif
}
}
/* if match at least 2, don't remove resouce of event */
if (flg > 1)
evt->flags ^= evt->flags;
break;
case EVFILT_TIMER:
flg = 0;
TAILQ_FOREACH_SAFE(task, &r->root_alarm, task_node, tmp) {
if ((uintptr_t) TASK_DATA(task) != ((uintptr_t) res[i].udata))
continue;
else {
flg++;
TASK_RET(task) = res[i].data;
TASK_FLAG(task) = (u_long) res[i].fflags;
}
/* remove alarm handle */
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskALARM]);
#endif
TAILQ_REMOVE(&r->root_alarm, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskALARM]);
#endif
task->task_type = taskREADY;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskREADY]);
#endif
TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskREADY]);
#endif
}
/* if match at least 2, don't remove resouce of event */
if (flg > 1)
evt->flags ^= evt->flags;
break;
case EVFILT_VNODE:
flg = 0;
TAILQ_FOREACH_SAFE(task, &r->root_node, task_node, tmp) {
if (TASK_FD(task) != ((intptr_t) res[i].udata))
continue;
else {
flg++;
TASK_RET(task) = res[i].data;
TASK_FLAG(task) = (u_long) res[i].fflags;
}
/* remove node handle */
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskNODE]);
#endif
TAILQ_REMOVE(&r->root_node, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskNODE]);
#endif
task->task_type = taskREADY;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskREADY]);
#endif
TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskREADY]);
#endif
}
/* if match at least 2, don't remove resouce of event */
if (flg > 1)
evt->flags ^= evt->flags;
break;
case EVFILT_PROC:
flg = 0;
TAILQ_FOREACH_SAFE(task, &r->root_proc, task_node, tmp) {
if (TASK_VAL(task) != ((uintptr_t) res[i].udata))
continue;
else {
flg++;
TASK_RET(task) = res[i].data;
TASK_FLAG(task) = (u_long) res[i].fflags;
}
/* remove proc handle */
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskPROC]);
#endif
TAILQ_REMOVE(&r->root_proc, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskPROC]);
#endif
task->task_type = taskREADY;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskREADY]);
#endif
TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskREADY]);
#endif
}
/* if match at least 2, don't remove resouce of event */
if (flg > 1)
evt->flags ^= evt->flags;
break;
case EVFILT_SIGNAL:
flg = 0;
TAILQ_FOREACH_SAFE(task, &r->root_signal, task_node, tmp) {
if (TASK_VAL(task) != ((uintptr_t) res[i].udata))
continue;
else {
flg++;
TASK_RET(task) = res[i].data;
TASK_FLAG(task) = (u_long) res[i].fflags;
}
/* remove signal handle */
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskSIGNAL]);
#endif
TAILQ_REMOVE(&r->root_signal, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskSIGNAL]);
#endif
task->task_type = taskREADY;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskREADY]);
#endif
TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskREADY]);
#endif
}
/* if match at least 2, don't remove resouce of event */
if (flg > 1)
evt->flags ^= evt->flags;
break;
#ifdef AIO_SUPPORT
case EVFILT_AIO:
flg = 0;
TAILQ_FOREACH_SAFE(task, &r->root_aio, task_node, tmp) {
acb = (struct aiocb*) TASK_VAL(task);
if (acb != ((struct aiocb*) res[i].udata))
continue;
else {
flg++;
TASK_RET(task) = res[i].data;
TASK_FLAG(task) = (u_long) res[i].fflags;
}
/* remove user handle */
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskAIO]);
#endif
TAILQ_REMOVE(&r->root_aio, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskAIO]);
#endif
task->task_type = taskREADY;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskREADY]);
#endif
TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskREADY]);
#endif
fd = acb->aio_fildes;
if ((len = aio_return(acb)) != -1) {
if (lseek(fd, acb->aio_offset + len, SEEK_CUR) == -1)
LOGERR;
} else
LOGERR;
free(acb);
TASK_DATLEN(task) = (u_long) len;
TASK_FD(task) = fd;
}
/* if match at least 2, don't remove resouce of event */
if (flg > 1)
evt->flags ^= evt->flags;
break;
#ifdef EVFILT_LIO
case EVFILT_LIO:
flg = 0;
TAILQ_FOREACH_SAFE(task, &r->root_lio, task_node, tmp) {
acbs = (struct aiocb**) TASK_VAL(task);
if (acbs != ((struct aiocb**) res[i].udata))
continue;
else {
flg++;
TASK_RET(task) = res[i].data;
TASK_FLAG(task) = (u_long) res[i].fflags;
}
/* remove user handle */
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskLIO]);
#endif
TAILQ_REMOVE(&r->root_lio, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskLIO]);
#endif
task->task_type = taskREADY;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskREADY]);
#endif
TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskREADY]);
#endif
iv = (struct iovec*) TASK_DATA(task);
fd = acbs[0]->aio_fildes;
off = acbs[0]->aio_offset;
for (j = len = 0; i < TASK_DATLEN(task); len += l, i++) {
if ((iv[i].iov_len = aio_return(acbs[i])) == -1)
l = 0;
else
l = iv[i].iov_len;
free(acbs[i]);
}
free(acbs);
TASK_DATLEN(task) = (u_long) len;
TASK_FD(task) = fd;
if (lseek(fd, off + len, SEEK_CUR) == -1)
LOGERR;
}
/* if match at least 2, don't remove resouce of event */
if (flg > 1)
evt->flags ^= evt->flags;
break;
#endif /* EVFILT_LIO */
#endif /* AIO_SUPPORT */
#ifdef EVFILT_USER
case EVFILT_USER:
flg = 0;
TAILQ_FOREACH_SAFE(task, &r->root_user, task_node, tmp) {
if (TASK_VAL(task) != ((uintptr_t) res[i].udata))
continue;
else {
flg++;
TASK_RET(task) = res[i].data;
TASK_FLAG(task) = (u_long) res[i].fflags;
}
/* remove user handle */
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskUSER]);
#endif
TAILQ_REMOVE(&r->root_user, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskUSER]);
#endif
task->task_type = taskREADY;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskREADY]);
#endif
TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskREADY]);
#endif
}
/* if match at least 2, don't remove resouce of event */
if (flg > 1)
evt->flags ^= evt->flags;
break;
#endif /* EVFILT_USER */
}
if (kevent(r->root_kq, evt, 1, NULL, 0, &now) == -1) {
if (r->root_hooks.hook_exec.exception) {
if (r->root_hooks.hook_exec.exception(r, NULL))
return NULL;
} else
LOGERR;
}
} /* end of kevent dispatcher */
skip_event:
/* timer update & put in ready queue */
clock_gettime(CLOCK_MONOTONIC, &now);
TAILQ_FOREACH_SAFE(task, &r->root_timer, task_node, tmp)
if (sched_timespeccmp(&now, &TASK_TS(task), -) >= 0) {
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskTIMER]);
#endif
TAILQ_REMOVE(&r->root_timer, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskTIMER]);
#endif
task->task_type = taskREADY;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskREADY]);
#endif
TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskREADY]);
#endif
}
/* put regular task priority task to ready queue,
if there is no ready task or reach max missing hit for regular task */
if ((task = TAILQ_FIRST(&r->root_task))) {
if (!TAILQ_FIRST(&r->root_ready) || r->root_miss >= TASK_VAL(task)) {
r->root_miss ^= r->root_miss;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskTASK]);
#endif
TAILQ_REMOVE(&r->root_task, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskTASK]);
#endif
task->task_type = taskREADY;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskREADY]);
#endif
TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskREADY]);
#endif
} else
r->root_miss++;
} else
r->root_miss ^= r->root_miss;
/* OK, lets get ready task !!! */
task = TAILQ_FIRST(&r->root_ready);
if (!(task))
return NULL;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskREADY]);
#endif
TAILQ_REMOVE(&r->root_ready, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskREADY]);
#endif
task->task_type = taskUNUSE;
#ifdef HAVE_LIBPTHREAD
pthread_mutex_lock(&r->root_mtx[taskUNUSE]);
#endif
TAILQ_INSERT_TAIL(&r->root_unuse, task, task_node);
#ifdef HAVE_LIBPTHREAD
pthread_mutex_unlock(&r->root_mtx[taskUNUSE]);
#endif
return task;
}
/*
* sched_hook_exception() - Default EXCEPTION hook
*
* @root = root task
* @arg = custom handling: if arg == EV_EOF or other value; default: arg == NULL log errno
* return: <0 errors and 0 ok
*/
void *
sched_hook_exception(void *root, void *arg)
{
sched_root_task_t *r = root;
if (!r)
return NULL;
/* custom exception handling ... */
if (arg) {
if (arg == (void*) EV_EOF)
return NULL;
return (void*) -1; /* raise scheduler error!!! */
}
/* if error hook exists */
if (r->root_hooks.hook_root.error)
return (r->root_hooks.hook_root.error(root, (void*) ((intptr_t) errno)));
/* default case! */
LOGERR;
return NULL;
}
/*
* sched_hook_condition() - Default CONDITION hook
*
* @root = root task
* @arg = killState from schedRun()
* return: NULL kill scheduler loop or !=NULL ok
*/
void *
sched_hook_condition(void *root, void *arg)
{
sched_root_task_t *r = root;
if (!r)
return NULL;
return (void*) (r->root_cond - *(intptr_t*) arg);
}
/*
* sched_hook_rtc() - Default RTC hook
*
* @task = current task
* @arg = unused
* return: <0 errors and 0 ok
*/
#if defined(HAVE_TIMER_CREATE) && defined(HAVE_TIMER_SETTIME)
void *
sched_hook_rtc(void *task, void *arg __unused)
{
sched_task_t *sigt = NULL, *t = task;
struct itimerspec its;
struct sigevent evt;
timer_t tmr;
if (!t || !TASK_ROOT(t))
return (void*) -1;
memset(&evt, 0, sizeof evt);
evt.sigev_notify = SIGEV_SIGNAL;
evt.sigev_signo = (intptr_t) TASK_DATA(t) + SIGRTMIN;
evt.sigev_value.sival_ptr = TASK_DATA(t);
if (timer_create(CLOCK_MONOTONIC, &evt, &tmr) == -1) {
if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
else
LOGERR;
return (void*) -1;
} else
TASK_FLAG(t) = (u_long) tmr;
if (!(sigt = schedSignal(TASK_ROOT(t), _sched_rtcWrapper, TASK_ARG(t), evt.sigev_signo,
t, (size_t) tmr))) {
if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
else
LOGERR;
timer_delete(tmr);
return (void*) -1;
} else
TASK_RET(t) = (uintptr_t) sigt;
memset(&its, 0, sizeof its);
its.it_value.tv_sec = t->task_val.ts.tv_sec;
its.it_value.tv_nsec = t->task_val.ts.tv_nsec;
if (timer_settime(tmr, TIMER_RELTIME, &its, NULL) == -1) {
if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
else
LOGERR;
schedCancel(sigt);
timer_delete(tmr);
return (void*) -1;
}
return NULL;
}
#endif /* HAVE_TIMER_CREATE */
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