You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

28 lines
580 B
C

#include <unistd.h>
#include <poll.h>
#include <errno.h>
#include "io_internal.h"
int64 io_waitread(int64 d,char* buf,int64 len) {
long r;
struct pollfd p;
io_entry* e=array_get(&io_fds,sizeof(io_entry),d);
if (!e) { errno=EBADF; return -3; }
if (e->nonblock) {
again:
p.fd=d;
if (p.fd != d) { errno=EBADF; return -3; } /* catch overflow */
p.events=POLLIN;
switch (poll(&p,1,-1)) {
case -1: if (errno==EAGAIN) goto again; return -3;
}
}
r=read(d,buf,len);
if (r==-1) {
if (errno==EAGAIN)
goto again;
r=-3;
}
return r;
}