Mirror of :pserver:cvs@cvs.fefe.de:/cvs libowfat https://www.fefe.de/libowfat/
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#define _GNU_SOURCE
#define extern
#include "io_internal.h"
#undef extern
#include "byte.h"
#ifdef HAVE_SIGIO
#include <signal.h>
#include <fcntl.h>
#endif
#include <sys/types.h>
#include <fcntl.h>
#ifdef HAVE_KQUEUE
#include <sys/event.h>
#endif
#ifdef HAVE_EPOLL
#include <inttypes.h>
#include <sys/epoll.h>
#endif
#include <unistd.h>
#ifdef HAVE_DEVPOLL
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/devpoll.h>
#endif
/* put d on internal data structure, return 1 on success, 0 on error */
int io_fd(int64 d) {
io_entry* e;
#ifndef __MINGW32__
long r;
if ((r=fcntl(d,F_GETFL,0)) == -1)
return 0; /* file descriptor not open */
#endif
if (!(e=array_allocate(&io_fds,sizeof(io_entry),d))) return 0;
byte_zero(e,sizeof(io_entry));
e->inuse=1;
#ifndef __MINGW32__
if (r&O_NDELAY) e->nonblock=1;
#endif
e->next_read=e->next_write=-1;
if (io_waitmode==UNDECIDED) {
first_readable=first_writeable=-1;
#if defined(HAVE_EPOLL)
io_master=epoll_create(1000);
if (io_master!=-1) io_waitmode=EPOLL;
#endif
#if defined(HAVE_KQUEUE)
if (io_waitmode==UNDECIDED) { /* who knows, maybe someone supports both one day */
io_master=kqueue();
if (io_master!=-1) io_waitmode=KQUEUE;
}
#endif
#if defined(HAVE_DEVPOLL)
if (io_waitmode==UNDECIDED) {
io_master=open("/dev/poll",O_RDWR);
if (io_master!=-1) io_waitmode=DEVPOLL;
}
#endif
#if defined(HAVE_SIGIO)
alt_firstread=alt_firstwrite=-1;
if (io_waitmode==UNDECIDED) {
io_signum=SIGRTMIN+1;
if (sigemptyset(&io_ss)==0 &&
sigaddset(&io_ss,io_signum)==0 &&
sigaddset(&io_ss,SIGIO)==0 &&
sigprocmask(SIG_BLOCK,&io_ss,0)==0)
io_waitmode=_SIGIO;
}
#endif
}
#if defined(HAVE_SIGIO)
if (io_waitmode==_SIGIO) {
fcntl(d,F_SETOWN,getpid());
fcntl(d,F_SETSIG,io_signum);
#if defined(O_ONESIGFD) && defined(F_SETAUXFL)
fcntl(d, F_SETAUXFL, O_ONESIGFD);
#endif
fcntl(d,F_SETFL,fcntl(d,F_GETFL)|O_NONBLOCK|O_ASYNC);
}
#endif
return 1;
}