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server: Make struct async into a real object, to keep it around while the APC is running.

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This commit is contained in:
Alexandre Julliard 2007-03-20 19:23:59 +01:00
parent 52a9af7ecb
commit 06db705238
4 changed files with 151 additions and 78 deletions
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1
server/Makefile.in
View file

@ -7,6 +7,7 @@ MODULE = none
EXTRALIBS = @LIBPOLL@
C_SRCS = \
async.c \
atom.c \
change.c \
class.c \

148
server/async.c Normal file
View file

@ -0,0 +1,148 @@
/*
* Server-side async I/O support
*
* Copyright (C) 2007 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winternl.h"
#include "object.h"
#include "file.h"
#include "request.h"
struct async
{
struct object obj; /* object header */
struct thread *thread; /* owning thread */
struct list queue_entry; /* entry in file descriptor queue */
struct timeout_user *timeout;
void *apc; /* apc function to call when alerted */
void *user; /* user-private argument for apc */
void *sb; /* pointer to I/O status block in client addr space */
};
static void async_dump( struct object *obj, int verbose );
static void async_destroy( struct object *obj );
static const struct object_ops async_ops =
{
sizeof(struct async), /* size */
async_dump, /* dump */
no_add_queue, /* add_queue */
NULL, /* remove_queue */
NULL, /* signaled */
NULL, /* satisfied */
no_signal, /* signal */
no_get_fd, /* get_fd */
no_map_access, /* map_access */
no_lookup_name, /* lookup_name */
no_close_handle, /* close_handle */
async_destroy /* destroy */
};
static void async_dump( struct object *obj, int verbose )
{
struct async *async = (struct async *)obj;
assert( obj->ops == &async_ops );
fprintf( stderr, "Async thread=%p\n", async->thread );
}
static void async_destroy( struct object *obj )
{
struct async *async = (struct async *)obj;
assert( obj->ops == &async_ops );
if (async->timeout) remove_timeout_user( async->timeout );
release_object( async->thread );
}
/* notifies client thread of new status of its async request */
/* destroys the server side of it */
static void async_terminate( struct async *async, unsigned int status )
{
apc_call_t data;
memset( &data, 0, sizeof(data) );
data.type = APC_ASYNC_IO;
data.async_io.func = async->apc;
data.async_io.user = async->user;
data.async_io.sb = async->sb;
data.async_io.status = status;
thread_queue_apc( async->thread, &async->obj, &data );
if (async->timeout) remove_timeout_user( async->timeout );
async->timeout = NULL;
list_remove( &async->queue_entry );
release_object( async );
}
/* callback for timeout on an async request */
static void async_timeout( void *private )
{
struct async *async = private;
async->timeout = NULL;
async_terminate( async, STATUS_TIMEOUT );
}
/* create an async on a given queue of a fd */
struct async *create_async( struct thread *thread, const struct timeval *timeout,
struct list *queue, void *io_apc, void *io_user, void *io_sb )
{
struct async *async = alloc_object( &async_ops );
if (!async) return NULL;
async->thread = (struct thread *)grab_object( thread );
async->apc = io_apc;
async->user = io_user;
async->sb = io_sb;
list_add_tail( queue, &async->queue_entry );
if (timeout) async->timeout = add_timeout_user( timeout, async_timeout, async );
else async->timeout = NULL;
return async;
}
/* terminate the async operation at the head of the queue */
void async_terminate_head( struct list *queue, unsigned int status )
{
struct list *ptr = list_head( queue );
if (ptr) async_terminate( LIST_ENTRY( ptr, struct async, queue_entry ), status );
}
/* terminate all async operations on the queue */
void async_terminate_queue( struct list *queue, unsigned int status )
{
struct list *ptr, *next;
LIST_FOR_EACH_SAFE( ptr, next, queue )
{
struct async *async = LIST_ENTRY( ptr, struct async, queue_entry );
async_terminate( async, status );
}
}

72
server/fd.c
View file

@ -1266,78 +1266,6 @@ void unlock_fd( struct fd *fd, file_pos_t start, file_pos_t count )
}
/****************************************************************/
/* asynchronous operations support */
struct async
{
struct thread *thread;
void *apc;
void *user;
void *sb;
struct timeout_user *timeout;
struct list entry;
};
/* notifies client thread of new status of its async request */
/* destroys the server side of it */
static void async_terminate( struct async *async, int status )
{
apc_call_t data;
memset( &data, 0, sizeof(data) );
data.type = APC_ASYNC_IO;
data.async_io.func = async->apc;
data.async_io.user = async->user;
data.async_io.sb = async->sb;
data.async_io.status = status;
thread_queue_apc( async->thread, NULL, &data );
if (async->timeout) remove_timeout_user( async->timeout );
async->timeout = NULL;
list_remove( &async->entry );
release_object( async->thread );
free( async );
}
/* cb for timeout on an async request */
static void async_callback(void *private)
{
struct async *async = (struct async *)private;
/* fprintf(stderr, "async timeout out %p\n", async); */
async->timeout = NULL;
async_terminate( async, STATUS_TIMEOUT );
}
/* create an async on a given queue of a fd */
struct async *create_async( struct thread *thread, const struct timeval *timeout,
struct list *queue, void *io_apc, void *io_user, void* io_sb )
{
struct async *async = mem_alloc( sizeof(struct async) );
if (!async) return NULL;
async->thread = (struct thread *)grab_object(thread);
async->apc = io_apc;
async->user = io_user;
async->sb = io_sb;
list_add_tail( queue, &async->entry );
if (timeout) async->timeout = add_timeout_user( timeout, async_callback, async );
else async->timeout = NULL;
return async;
}
/* terminate the async operation at the head of the queue */
void async_terminate_head( struct list *queue, int status )
{
struct list *ptr = list_head( queue );
if (ptr) async_terminate( LIST_ENTRY( ptr, struct async, entry ), status );
}
/****************************************************************/
/* file descriptor functions */

8
server/file.h
View file

@ -124,12 +124,8 @@ extern struct object *create_serial( struct fd *fd, unsigned int options );
/* async I/O functions */
extern struct async *create_async( struct thread *thread, const struct timeval *timeout,
struct list *queue, void *, void *, void *);
extern void async_terminate_head( struct list *queue, int status );
static inline void async_terminate_queue( struct list *queue, int status )
{
while (!list_empty( queue )) async_terminate_head( queue, status );
}
extern void async_terminate_head( struct list *queue, unsigned int status );
extern void async_terminate_queue( struct list *queue, unsigned int status );
/* access rights that require Unix read permission */
#define FILE_UNIX_READ_ACCESS (FILE_READ_DATA|FILE_READ_ATTRIBUTES|FILE_READ_EA)