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Implement SIGEV_THREAD notification for aio_fsync.

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This commit is contained in:
David Xu 2006-03-24 03:24:27 +00:00
parent dbbccfe923
commit 3c77872824
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=157078
1 changed files with 59 additions and 22 deletions
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81
lib/librt/aio.c
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@ -47,6 +47,8 @@ __weak_reference(__aio_return, _aio_return);
__weak_reference(__aio_return, aio_return);
__weak_reference(__aio_waitcomplete, _aio_waitcomplete);
__weak_reference(__aio_waitcomplete, aio_waitcomplete);
__weak_reference(__aio_fsync, _aio_fsync);
__weak_reference(__aio_fsync, aio_fsync);
typedef void (*aio_func)(union sigval val, struct aiocb *iocb);
@ -55,6 +57,7 @@ extern int __sys_aio_write(struct aiocb *iocb);
extern int __sys_aio_waitcomplete(struct aiocb **iocbp, struct timespec *timeout);
extern int __sys_aio_return(struct aiocb *iocb);
extern int __sys_aio_error(struct aiocb *iocb);
extern int __sys_aio_fsync(int op, struct aiocb *iocb);
static void
aio_dispatch(struct sigev_node *sn)
@ -64,6 +67,34 @@ aio_dispatch(struct sigev_node *sn)
f(sn->sn_value, (struct aiocb *)sn->sn_id);
}
static int
aio_sigev_alloc(struct aiocb *iocb, struct sigev_node **sn,
struct sigevent *saved_ev)
{
if (__sigev_check_init()) {
/* This might be that thread library is not enabled. */
errno = EINVAL;
return (-1);
}
*sn = __sigev_alloc(SI_ASYNCIO, &iocb->aio_sigevent, NULL, 1);
if (*sn == NULL) {
errno = EAGAIN;
return (-1);
}
*saved_ev = iocb->aio_sigevent;
(*sn)->sn_id = (sigev_id_t)iocb;
__sigev_get_sigevent(*sn, &iocb->aio_sigevent, (*sn)->sn_id);
(*sn)->sn_dispatch = aio_dispatch;
__sigev_list_lock();
__sigev_register(*sn);
__sigev_list_unlock();
return (0);
}
static int
aio_io(struct aiocb *iocb, int (*sysfunc)(struct aiocb *iocb))
{
@ -76,30 +107,11 @@ aio_io(struct aiocb *iocb, int (*sysfunc)(struct aiocb *iocb))
return (ret);
}
if (__sigev_check_init()) {
/* This might be that thread library is not enabled. */
errno = EINVAL;
return (-1);
}
sn = __sigev_alloc(SI_ASYNCIO, &iocb->aio_sigevent, NULL, 1);
if (sn == NULL) {
errno = EAGAIN;
return (-1);
}
saved_ev = iocb->aio_sigevent;
sn->sn_id = (sigev_id_t)iocb;
__sigev_get_sigevent(sn, &iocb->aio_sigevent, sn->sn_id);
__sigev_list_lock();
__sigev_register(sn);
__sigev_list_unlock();
sn->sn_dispatch = aio_dispatch;
ret = aio_sigev_alloc(iocb, &sn, &saved_ev);
if (ret)
return (ret);
ret = sysfunc(iocb);
iocb->aio_sigevent = saved_ev;
if (ret != 0) {
err = errno;
__sigev_list_lock();
@ -157,3 +169,28 @@ __aio_return(struct aiocb *iocb)
return __sys_aio_return(iocb);
}
int
__aio_fsync(int op, struct aiocb *iocb)
{
struct sigev_node *sn;
struct sigevent saved_ev;
int ret, err;
if (iocb->aio_sigevent.sigev_notify != SIGEV_THREAD)
return __sys_aio_fsync(op, iocb);
ret = aio_sigev_alloc(iocb, &sn, &saved_ev);
if (ret)
return (ret);
ret = __sys_aio_fsync(op, iocb);
iocb->aio_sigevent = saved_ev;
if (ret != 0) {
err = errno;
__sigev_list_lock();
__sigev_delete_node(sn);
__sigev_list_unlock();
errno = err;
}
return (ret);
}