minix3/lib/libasyn/asyn_close.c

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2020-02-21 00:59:27 +05:30
/* asyn_close() - forcefully forget about a file descriptor
* Author: Kees J. Bot
* 7 Jul 1997
*/
#include "asyn.h"
int asyn_close(asynchio_t *asyn, int fd)
/* Stop caring about any async operations on this file descriptor. */
{
asynfd_t *afd;
int op;
if ((unsigned) fd >= FD_SETSIZE) { errno= EBADF; return -1; }
afd= &asyn->asyn_afd[fd];
for (op= 0; op < SEL_NR; op++) {
afd->afd_state[op]= IDLE;
FD_CLR(fd, &asyn->asyn_fdset[op]);
}
afd->afd_seen= 0;
asyn->asyn_more++;
return 0;
}