Mirror of :pserver:cvs@cvs.fefe.de:/cvs libowfat https://www.fefe.de/libowfat/
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#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include "io_internal.h"
#ifdef HAVE_KQUEUE
#include <sys/types.h>
#include <sys/event.h>
#include <sys/time.h>
#endif
#ifdef HAVE_EPOLL
#include <inttypes.h>
#include <sys/epoll.h>
#include <byte.h>
#endif
#ifdef HAVE_SIGIO
#include <sys/poll.h>
#endif
#ifdef HAVE_DEVPOLL
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/devpoll.h>
#endif
#ifdef __MINGW32__
#include <mswsock.h>
#endif
#ifdef DEBUG
#include <assert.h>
#else
#define assert(x)
#endif
void io_wantread_really(int64 d,io_entry* e) {
int newfd;
assert(!e->kernelwantread);
newfd=!e->kernelwantwrite;
io_wanted_fds+=newfd;
#ifdef HAVE_EPOLL
if (io_waitmode==EPOLL) {
struct epoll_event x;
byte_zero(&x,sizeof(x)); // to shut up valgrind
x.events=EPOLLIN;
if (e->kernelwantwrite) x.events|=EPOLLOUT;
x.data.fd=d;
epoll_ctl(io_master,e->kernelwantwrite?EPOLL_CTL_MOD:EPOLL_CTL_ADD,d,&x);
}
#endif
#ifdef HAVE_KQUEUE
if (io_waitmode==KQUEUE) {
struct kevent kev;
struct timespec ts;
EV_SET(&kev, d, EVFILT_READ, EV_ADD|EV_ENABLE, 0, 0, 0);
ts.tv_sec=0; ts.tv_nsec=0;
kevent(io_master,&kev,1,0,0,&ts);
}
#endif
#ifdef HAVE_DEVPOLL
if (io_waitmode==DEVPOLL) {
struct pollfd x;
x.fd=d;
x.events=POLLIN;
if (e->wantwrite) x.events|=POLLOUT;
write(io_master,&x,sizeof(x));
}
#endif
#ifdef HAVE_SIGIO
if (io_waitmode==_SIGIO) {
struct pollfd p;
p.fd=d;
p.events=POLLIN;
switch (poll(&p,1,0)) {
case 1: e->canread=1; break;
case 0: e->canread=0; break;
case -1: return;
}
if (e->canread) {
debug_printf(("io_wantread: enqueueing %lld in normal read queue (next is %ld)\n",d,first_readable));
e->next_read=first_readable;
first_readable=d;
}
}
#endif
#ifdef __MINGW32__
if (e->listened) {
if (e->next_accept==0) e->next_accept=socket(AF_INET,SOCK_STREAM,0);
if (e->next_accept!=-1) {
AcceptEx(d,e->next_accept,e->inbuf,0,200,200,&e->errorcode,&e->or);
e->acceptqueued=1;
}
} else if (!e->wantread) {
if (ReadFile((HANDLE)d,e->inbuf,sizeof(e->inbuf),&e->errorcode,&e->or)) {
queueread:
/* had something to read immediately. Damn! */
e->readqueued=0;
e->canread=1;
e->bytes_read=e->errorcode;
e->errorcode=0;
e->next_read=first_readable;
first_readable=d;
return;
} else if (GetLastError()==ERROR_IO_PENDING)
e->readqueued=1;
else
goto queueread;
#if 0
e->next_read=first_readable;
first_readable=d;
#endif
}
#endif
e->wantread=1;
e->kernelwantread=1;
}
void io_wantread(int64 d) {
io_entry* e=array_get(&io_fds,sizeof(io_entry),d);
if (!e || e->wantread) return;
if (e->canread) {
e->next_read=first_readable;
first_readable=d;
e->wantread=1;
return;
}
/* the harder case: do as before */
if (!e->kernelwantread) io_wantread_really(d, e); else e->wantread=1;
}