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/* ISC license. */
#include <skalibs/sysdeps.h>
#ifdef SKALIBS_HASKEVENT
#include <skalibs/nonposix.h>
#include <errno.h>
#include <pthread.h>
#include <limits.h>
#include <skalibs/fcntl.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/djbunix.h>
#include <skalibs/keventbridge.h>
#ifdef SKALIBS_HASKQUEUE1
# define kqueuec() kqueue1(O_CLOEXEC)
#else
static int kqueuec (void)
{
int kq = kqueue() ;
if (kq == -1) return -1 ;
if (coe(kq) == -1)
{
fd_close(kq) ;
return -1 ;
}
return kq ;
}
#endif
static void *keventbridge_reader (void *arg)
{
keventbridge *kbp = arg ;
struct kevent ke ;
for (;;)
{
int r = kevent(kbp->kq, 0, 0, &ke, 1, 0) ;
if (r == -1 && errno != EINTR) break ;
if (r > 0 && allwrite(kbp->p[1], (char *)&ke, sizeof(ke)) < sizeof(ke)) break ;
}
fd_close(kbp->p[1]) ;
kbp->p[1] = -1 ;
return 0 ;
}
int keventbridge_start (keventbridge *kbp)
{
pthread_attr_t attr ;
int e ;
kbp->kq = kqueuec() ;
if (pipecoe(kbp->p) == -1) goto errkq ;
if (ndelay_on(kbp->p[0]) == -1) goto errp ;
e = pthread_attr_init(&attr) ;
if (e) { errno = e ; goto errp ; }
#ifdef PTHREAD_STACK_MIN
pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN) ;
#endif
e = pthread_create(&kbp->th, &attr, &keventbridge_reader, kbp) ;
if (e) { errno = e ; goto errattr ; }
pthread_attr_destroy(&attr) ;
return kbp->p[0] ;
errattr:
pthread_attr_destroy(&attr) ;
errp:
fd_close(kbp->p[1]) ;
fd_close(kbp->p[0]) ;
errkq:
fd_close(kbp->kq) ;
return -1 ;
}
#endif
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