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