/*
* Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* File: sys/aio_kern.h
struct aio_workq_entry
{
- TAILQ_ENTRY( aio_workq_entry ) aio_workq_link;
- struct proc *procp; /* user proc that queued this request */
- user_addr_t uaiocbp; /* pointer passed in from user land */
- user_addr_t fsyncp; /* not NULL means this request must complete */
- /* before an aio_fsync call can proceed. */
- vm_map_t aio_map; /* user land map we have a reference to */
- user_ssize_t returnval; /* return value from read / write request */
- int errorval; /* error value from read / write request */
- int flags;
- long group_tag; /* identifier used to group IO requests */
- struct user_aiocb aiocb; /* copy of aiocb from user land */
+ TAILQ_ENTRY( aio_workq_entry ) aio_workq_link; /* Protected by queue lock */
+ TAILQ_ENTRY( aio_workq_entry ) aio_proc_link; /* Proteced by proc's aio lock */
+
+ /* Proc lock */
+ void *group_tag; /* identifier used to group IO requests */
+
+ /* Initialized and never changed, safe to access */
+ struct proc *procp; /* user proc that queued this request */
+ user_addr_t uaiocbp; /* pointer passed in from user land */
+ struct user_aiocb aiocb; /* copy of aiocb from user land */
+ vm_map_t aio_map; /* user land map we have a reference to */
+
+ /* Entry lock */
+ int aio_refcount;
+ user_ssize_t returnval; /* return value from read / write request */
+ int errorval; /* error value from read / write request */
+ int flags;
};
typedef struct aio_workq_entry aio_workq_entry;
/*
* definitions for aio_workq_entry.flags
*/
-#define AIO_READ 0x00000001
-#define AIO_WRITE 0x00000002
+#define AIO_READ 0x00000001 /* a read */
+#define AIO_WRITE 0x00000002 /* a write */
#define AIO_FSYNC 0x00000004 /* aio_fsync with op = O_SYNC */
#define AIO_DSYNC 0x00000008 /* aio_fsync with op = O_DSYNC (not supported yet) */
#define AIO_LIO 0x00000010 /* lio_listio generated IO */
-#define AIO_DO_FREE 0x00000800 /* entry needs to be freed */
-#define AIO_COMPLETION 0x00001000 /* entry is in completion processing (not freeable yet) */
+#define AIO_DO_FREE 0x00000800 /* entry should be freed when last reference is dropped. */
+ /* set by aio_return() and _aio_exit() */
#define AIO_DISABLE 0x00002000 /* process is trying to exit or exec and we need */
- /* to disable normal completion notification */
-#define AIO_WAITING 0x00004000 /* process is trying to exit, exec, or close and is */
- /* waiting for one or more active IO requests to */
- /* complete */
+ /* to not try to send a signal from do_aio_completion() */
+#define AIO_CLOSE_WAIT 0x00004000 /* process is trying to close and is */
+ /* waiting for one or more active IO requests to */
+ /* complete */
+#define AIO_EXIT_WAIT 0x00008000 /* process is trying to exit or exec and is */
+ /* waiting for one or more active IO requests to */
+ /* complete */
+
+#define AIO_LIO_NOTIFY 0x00010000 /* wait for list complete */
/*
* Prototypes
_aio_create_worker_threads(int num);
__private_extern__ void
-aio_init(void);
+aio_init(void) __attribute__((section("__TEXT, initcode")));
task_t
get_aiotask(void);
projects / apple / xnu.git / blobdiff