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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "primpl.h"
#include <signal.h>
void _MD_EarlyInit(void)
{
/*
* Ignore FPE because coercion of a NaN to an int causes SIGFPE
* to be raised.
*/
struct sigaction act;
act.sa_handler = SIG_IGN;
sigemptyset(&act.sa_mask);
act.sa_flags = SA_RESTART;
sigaction(SIGFPE, &act, 0);
}
PRWord *_MD_HomeGCRegisters(PRThread *t, int isCurrent, int *np)
{
#ifndef _PR_PTHREADS
if (isCurrent) {
(void) sigsetjmp(CONTEXT(t), 1);
}
*np = sizeof(CONTEXT(t)) / sizeof(PRWord);
return (PRWord *) CONTEXT(t);
#else
*np = 0;
return NULL;
#endif
}
#ifndef _PR_PTHREADS
void
_MD_SET_PRIORITY(_MDThread *thread, PRUintn newPri)
{
return;
}
PRStatus
_MD_InitializeThread(PRThread *thread)
{
return PR_SUCCESS;
}
PRStatus
_MD_WAIT(PRThread *thread, PRIntervalTime ticks)
{
PR_ASSERT(!(thread->flags & _PR_GLOBAL_SCOPE));
_PR_MD_SWITCH_CONTEXT(thread);
return PR_SUCCESS;
}
PRStatus
_MD_WAKEUP_WAITER(PRThread *thread)
{
if (thread) {
PR_ASSERT(!(thread->flags & _PR_GLOBAL_SCOPE));
}
return PR_SUCCESS;
}
/* These functions should not be called for OSF1 */
void
_MD_YIELD(void)
{
PR_NOT_REACHED("_MD_YIELD should not be called for OSF1.");
}
PRStatus
_MD_CREATE_THREAD(
PRThread *thread,
void (*start) (void *),
PRThreadPriority priority,
PRThreadScope scope,
PRThreadState state,
PRUint32 stackSize)
{
PR_NOT_REACHED("_MD_CREATE_THREAD should not be called for OSF1.");
return PR_FAILURE;
}
#endif /* ! _PR_PTHREADS */
#if defined(_PR_NEED_FAKE_POLL)
#include <fcntl.h>
int poll(struct pollfd *filedes, unsigned long nfds, int timeout)
{
int i;
int rv;
int maxfd;
fd_set rd, wr, ex;
struct timeval tv, *tvp;
if (timeout < 0 && timeout != -1) {
errno = EINVAL;
return -1;
}
if (timeout == -1) {
tvp = NULL;
} else {
tv.tv_sec = timeout / 1000;
tv.tv_usec = (timeout % 1000) * 1000;
tvp = &tv;
}
maxfd = -1;
FD_ZERO(&rd);
FD_ZERO(&wr);
FD_ZERO(&ex);
for (i = 0; i < nfds; i++) {
int osfd = filedes[i].fd;
int events = filedes[i].events;
PRBool fdHasEvent = PR_FALSE;
if (osfd < 0) {
continue; /* Skip this osfd. */
}
/*
* Map the native poll flags to nspr poll flags.
* POLLIN, POLLRDNORM ===> PR_POLL_READ
* POLLOUT, POLLWRNORM ===> PR_POLL_WRITE
* POLLPRI, POLLRDBAND ===> PR_POLL_EXCEPTION
* POLLNORM, POLLWRBAND (and POLLMSG on some platforms)
* are ignored.
*
* The output events POLLERR and POLLHUP are never turned on.
* POLLNVAL may be turned on.
*/
if (events & (POLLIN | POLLRDNORM)) {
FD_SET(osfd, &rd);
fdHasEvent = PR_TRUE;
}
if (events & (POLLOUT | POLLWRNORM)) {
FD_SET(osfd, &wr);
fdHasEvent = PR_TRUE;
}
if (events & (POLLPRI | POLLRDBAND)) {
FD_SET(osfd, &ex);
fdHasEvent = PR_TRUE;
}
if (fdHasEvent && osfd > maxfd) {
maxfd = osfd;
}
}
rv = select(maxfd + 1, &rd, &wr, &ex, tvp);
/* Compute poll results */
if (rv > 0) {
rv = 0;
for (i = 0; i < nfds; i++) {
PRBool fdHasEvent = PR_FALSE;
filedes[i].revents = 0;
if (filedes[i].fd < 0) {
continue;
}
if (FD_ISSET(filedes[i].fd, &rd)) {
if (filedes[i].events & POLLIN) {
filedes[i].revents |= POLLIN;
}
if (filedes[i].events & POLLRDNORM) {
filedes[i].revents |= POLLRDNORM;
}
fdHasEvent = PR_TRUE;
}
if (FD_ISSET(filedes[i].fd, &wr)) {
if (filedes[i].events & POLLOUT) {
filedes[i].revents |= POLLOUT;
}
if (filedes[i].events & POLLWRNORM) {
filedes[i].revents |= POLLWRNORM;
}
fdHasEvent = PR_TRUE;
}
if (FD_ISSET(filedes[i].fd, &ex)) {
if (filedes[i].events & POLLPRI) {
filedes[i].revents |= POLLPRI;
}
if (filedes[i].events & POLLRDBAND) {
filedes[i].revents |= POLLRDBAND;
}
fdHasEvent = PR_TRUE;
}
if (fdHasEvent) {
rv++;
}
}
PR_ASSERT(rv > 0);
} else if (rv == -1 && errno == EBADF) {
rv = 0;
for (i = 0; i < nfds; i++) {
filedes[i].revents = 0;
if (filedes[i].fd < 0) {
continue;
}
if (fcntl(filedes[i].fd, F_GETFL, 0) == -1) {
filedes[i].revents = POLLNVAL;
rv++;
}
}
PR_ASSERT(rv > 0);
}
PR_ASSERT(-1 != timeout || rv != 0);
return rv;
}
#endif /* _PR_NEED_FAKE_POLL */
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