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/*-
* Copyright (c) 2012 Michael Tuexen
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <sys/types.h>
#if !defined (__Userspace_os_Windows)
#include <sys/wait.h>
#include <unistd.h>
#include <pthread.h>
#endif
#if defined(__Userspace_os_NaCl)
#include <sys/select.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <netinet/sctp_pcb.h>
#include <netinet/sctp_sysctl.h>
#include "netinet/sctp_callout.h"
/* This is the polling time of callqueue in milliseconds
* 10ms seems to work well. 1ms was giving erratic behavior
*/
#define TIMEOUT_INTERVAL 10
extern int ticks;
void *
user_sctp_timer_iterate(void *arg)
{
sctp_os_timer_t *c;
void (*c_func)(void *);
void *c_arg;
sctp_os_timer_t *sctp_os_timer_next;
/*
* The MSEC_TO_TICKS conversion depends on hz. The to_ticks in
* sctp_os_timer_start also depends on hz. E.g. if hz=1000 then
* for multiple INIT the to_ticks is 2000, 4000, 8000, 16000, 32000, 60000
* and further to_ticks level off at 60000 i.e. 60 seconds.
* If hz=100 then for multiple INIT the to_ticks are 200, 400, 800 and so-on.
*/
for (;;) {
#if defined (__Userspace_os_Windows)
Sleep(TIMEOUT_INTERVAL);
#else
struct timeval timeout;
timeout.tv_sec = 0;
timeout.tv_usec = 1000 * TIMEOUT_INTERVAL;
select(0, NULL, NULL, NULL, &timeout);
#endif
if (SCTP_BASE_VAR(timer_thread_should_exit)) {
break;
}
SCTP_TIMERQ_LOCK();
/* update our tick count */
ticks += MSEC_TO_TICKS(TIMEOUT_INTERVAL);
c = TAILQ_FIRST(&SCTP_BASE_INFO(callqueue));
while (c) {
if (c->c_time <= ticks) {
sctp_os_timer_next = TAILQ_NEXT(c, tqe);
TAILQ_REMOVE(&SCTP_BASE_INFO(callqueue), c, tqe);
c_func = c->c_func;
c_arg = c->c_arg;
c->c_flags &= ~SCTP_CALLOUT_PENDING;
SCTP_TIMERQ_UNLOCK();
c_func(c_arg);
SCTP_TIMERQ_LOCK();
c = sctp_os_timer_next;
} else {
c = TAILQ_NEXT(c, tqe);
}
}
SCTP_TIMERQ_UNLOCK();
}
return (NULL);
}
void
sctp_start_timer(void)
{
/*
* No need to do SCTP_TIMERQ_LOCK_INIT();
* here, it is being done in sctp_pcb_init()
*/
#if defined (__Userspace_os_Windows)
if ((SCTP_BASE_VAR(timer_thread) = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)user_sctp_timer_iterate, NULL, 0, NULL)) == NULL) {
SCTP_PRINTF("ERROR; Creating ithread failed\n");
}
#else
int rc;
rc = pthread_create(&SCTP_BASE_VAR(timer_thread), NULL, user_sctp_timer_iterate, NULL);
if (rc) {
SCTP_PRINTF("ERROR; return code from pthread_create() is %d\n", rc);
}
#endif
}
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