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/* ISC license. */
#include <sys/uio.h>
#include <stdint.h>
#include <errno.h>
#include <skalibs/posixishard.h>
#include <skalibs/error.h>
#include <skalibs/uint16.h>
#include <skalibs/genalloc.h>
#include <skalibs/gensetdyn.h>
#include <skalibs/textclient.h>
#include <s6/s6lock.h>
static int msghandler (struct iovec const *v, void *context)
{
s6lock_t *a = (s6lock_t *)context ;
char const *s = v->iov_base ;
char *p ;
uint16_t id ;
if (v->iov_len != 3) return (errno = EPROTO, 0) ;
uint16_unpack_big(s, &id) ;
p = GENSETDYN_P(char, &a->data, id) ;
if (*p == EBUSY) *p = s[2] ;
else if (error_isagain(*p)) *p = s[2] ? s[2] : EBUSY ;
else return (errno = EPROTO, 0) ;
if (!genalloc_append(uint16_t, &a->list, &id)) return 0 ;
return 1 ;
}
int s6lock_update (s6lock_t *a)
{
genalloc_setlen(uint16_t, &a->list, 0) ;
return textclient_update(&a->connection, &msghandler, a) ;
}
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