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update kqueue when new directories are added

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This commit is contained in:
Joey Hess 2012-06-18 21:46:04 -04:00
parent 2bfcc0b09c
commit 5e9fdac92f
2 changed files with 33 additions and 19 deletions
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25
Utility/libkqueue.c
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@ -18,11 +18,12 @@
* Fds passed to prior calls still take effect, so it's most efficient to
* not pass the same fds repeatedly.
*/
signed int helper(const int kq, const int fdcnt, const int *fdlist,
struct timespec *timeout) {
signed int helper(const int kq, const int fdcnt, const int *fdlist, int nodelay) {
int i, nev;
struct kevent evlist[1];
struct kevent chlist[fdcnt];
struct timespec avoiddelay = {0, 0};
struct timespec *timeout = nodelay ? &avoiddelay : NULL;
for (i = 0; i < fdcnt; i++) {
EV_SET(&chlist[i], fdlist[i], EVFILT_VNODE,
@ -43,30 +44,27 @@ signed int helper(const int kq, const int fdcnt, const int *fdlist,
return -1;
}
/* Initializes a kqueue, with a list of fds to watch for changes.
* Returns the kqueue's handle. */
/* Initializes a new, empty kqueue. */
int init_kqueue(const int fdcnt, const int *fdlist) {
struct timespec nodelay = {0, 0};
int kq;
if ((kq = kqueue()) == -1) {
perror("kqueue");
exit(1);
}
/* Prime the pump with the list of fds, but don't wait for any
* change events. */
helper(kq, fdcnt, fdlist, &nodelay);
return kq;
}
/* Adds fds to the set that should be watched. */
void addfds_kqueue(const int kq, const int fdcnt, const int *fdlist) {
helper(kq, fdcnt, fdlist, 1);
}
/* Waits for a change event on a kqueue.
*
* Returns the fd that changed, or -1 on error.
*/
signed int waitchange_kqueue(const int kq) {
return helper(kq, 0, NULL, NULL);
return helper(kq, 0, NULL, 0);
}
/*
@ -74,7 +72,8 @@ main () {
int list[1];
int kq;
list[0]=open(".", O_RDONLY);
kq = init_kqueue(1, list);
kq = init_kqueue();
addfds_kqueue(kq, 1, list)
printf("change: %i\n", waitchange_kqueue(kq));
}
*/