From 645d4d320dd476ec3045addfb77e1d859b24d28e Mon Sep 17 00:00:00 2001
From: davidxu <davidxu@FreeBSD.org>
Date: Fri, 24 Mar 2006 03:24:27 +0000
Subject: Implement SIGEV_THREAD notification for aio_fsync.

---
 lib/librt/aio.c | 73 +++++++++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 55 insertions(+), 18 deletions(-)

diff --git a/lib/librt/aio.c b/lib/librt/aio.c
index 23f14bc..25d7662 100644
--- a/lib/librt/aio.c
+++ b/lib/librt/aio.c
@@ -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)
@@ -65,41 +68,50 @@ aio_dispatch(struct sigev_node *sn)
 }
 
 static int
-aio_io(struct aiocb *iocb, int (*sysfunc)(struct aiocb *iocb))
+aio_sigev_alloc(struct aiocb *iocb, struct sigev_node **sn,
+	struct sigevent *saved_ev)
 {
-	struct sigev_node *sn;
-	struct sigevent saved_ev;
-	int ret, err;
-
-	if (iocb->aio_sigevent.sigev_notify != SIGEV_THREAD) {
-		ret = sysfunc(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) {
+	*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);
+	*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_register(*sn);
 	__sigev_list_unlock();
 
-	sn->sn_dispatch = aio_dispatch;
+	return (0);
+}
+
+static int
+aio_io(struct aiocb *iocb, int (*sysfunc)(struct aiocb *iocb))
+{
+	struct sigev_node *sn;
+	struct sigevent saved_ev;
+	int ret, err;
+
+	if (iocb->aio_sigevent.sigev_notify != SIGEV_THREAD) {
+		ret = sysfunc(iocb);
+		return (ret);
+	}
+
+	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);
+}
-- 
cgit v1.1