* Copyright (c) 2004-2005 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* 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
* 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.
- *
+ *
* 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,
* 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_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
#ifndef _SYS_PIPE_H_
#define _SYS_PIPE_H_
-#ifdef KERNEL
+#ifdef KERNEL
#include <libkern/locks.h>
#endif
-#include <sys/queue.h> /* for TAILQ macros */
+#include <sys/queue.h> /* for TAILQ macros */
#include <sys/ev.h>
#include <sys/cdefs.h>
#include <sys/_types/_caddr_t.h>
* Pipe buffer size, keep moderate in value, pipes take kva space.
*/
#ifndef PIPE_SIZE
-#define PIPE_SIZE 16384
+#define PIPE_SIZE 16384
#endif
-#define PIPE_KVAMAX (1024 * 1024 * 16)
+#define PIPE_KVAMAX (1024 * 1024 * 16)
#ifndef BIG_PIPE_SIZE
-#define BIG_PIPE_SIZE (64*1024)
+#define BIG_PIPE_SIZE (64*1024)
#endif
#ifndef SMALL_PIPE_SIZE
-#define SMALL_PIPE_SIZE PAGE_SIZE
+#define SMALL_PIPE_SIZE PAGE_SIZE
#endif
/*
* than PIPE_BUF.
*/
#ifndef PIPE_MINDIRECT
-#define PIPE_MINDIRECT 8192
+#define PIPE_MINDIRECT 8192
#endif
-#define PIPENPAGES (BIG_PIPE_SIZE / PAGE_SIZE + 1)
+#define PIPENPAGES (BIG_PIPE_SIZE / PAGE_SIZE + 1)
/*
* Pipe buffer information.
* Buffered write is active when the buffer.cnt field is set.
*/
struct pipebuf {
- u_int cnt; /* number of chars currently in buffer */
- u_int in; /* in pointer */
- u_int out; /* out pointer */
- u_int size; /* size of buffer */
- caddr_t buffer; /* kva of buffer */
+ u_int cnt; /* number of chars currently in buffer */
+ u_int in; /* in pointer */
+ u_int out; /* out pointer */
+ u_int size; /* size of buffer */
+ caddr_t buffer; /* kva of buffer */
};
* Information to support direct transfers between processes for pipes.
*/
struct pipemapping {
- vm_offset_t kva; /* kernel virtual address */
- vm_size_t cnt; /* number of chars in buffer */
- vm_size_t pos; /* current position of transfer */
- int npages; /* number of pages */
- vm_page_t ms[PIPENPAGES]; /* pages in source process */
+ vm_offset_t kva; /* kernel virtual address */
+ vm_size_t cnt; /* number of chars in buffer */
+ vm_size_t pos; /* current position of transfer */
+ int npages; /* number of pages */
+ vm_page_t ms[PIPENPAGES]; /* pages in source process */
};
#endif
/*
* Bits in pipe_state.
*/
-#define PIPE_ASYNC 0x004 /* Async? I/O. */
-#define PIPE_WANTR 0x008 /* Reader wants some characters. */
-#define PIPE_WANTW 0x010 /* Writer wants space to put characters. */
-#define PIPE_WANT 0x020 /* Pipe is wanted to be run-down. */
-#define PIPE_SEL 0x040 /* Pipe has a select active. */
-#define PIPE_EOF 0x080 /* Pipe is in EOF condition. */
-#define PIPE_LOCKFL 0x100 /* Process has exclusive access to pointers/data. */
-#define PIPE_LWANT 0x200 /* Process wants exclusive access to pointers/data. */
-#define PIPE_DIRECTW 0x400 /* Pipe direct write active. */
-#define PIPE_DIRECTOK 0x800 /* Direct mode ok. */
-#define PIPE_KNOTE 0x1000 /* Pipe has kernel events activated */
-#define PIPE_DRAIN 0x2000 /* Waiting for I/O to drop for a close. Treated like EOF;
- only separate for easier debugging. */
-#define PIPE_WSELECT 0x4000 /* Some thread has done an FWRITE select on the pipe */
-#define PIPE_DEAD 0x8000 /* Pipe is dead and needs garbage collection */
-
-#ifdef KERNEL
+#define PIPE_ASYNC 0x004 /* Async? I/O. */
+#define PIPE_WANTR 0x008 /* Reader wants some characters. */
+#define PIPE_WANTW 0x010 /* Writer wants space to put characters. */
+#define PIPE_WANT 0x020 /* Pipe is wanted to be run-down. */
+#define PIPE_SEL 0x040 /* Pipe has a select active. */
+#define PIPE_EOF 0x080 /* Pipe is in EOF condition. */
+#define PIPE_LOCKFL 0x100 /* Process has exclusive access to pointers/data. */
+#define PIPE_LWANT 0x200 /* Process wants exclusive access to pointers/data. */
+#define PIPE_DIRECTW 0x400 /* Pipe direct write active. */
+#define PIPE_DIRECTOK 0x800 /* Direct mode ok. */
+// was PIPE_KNOTE 0x1000
+#define PIPE_DRAIN 0x2000 /* Waiting for I/O to drop for a close. Treated like EOF;
+ * only separate for easier debugging. */
+#define PIPE_WSELECT 0x4000 /* Some thread has done an FWRITE select on the pipe */
+#define PIPE_DEAD 0x8000 /* Pipe is dead and needs garbage collection */
+
+#ifdef KERNEL
struct label;
* Two of these are linked together to produce bi-directional pipes.
*/
struct pipe {
- struct pipebuf pipe_buffer; /* data storage */
+ struct pipebuf pipe_buffer; /* data storage */
#ifdef PIPE_DIRECT
- struct pipemapping pipe_map; /* pipe mapping for direct I/O */
+ struct pipemapping pipe_map; /* pipe mapping for direct I/O */
#endif
- struct selinfo pipe_sel; /* for compat with select */
- pid_t pipe_pgid; /* information for async I/O */
- struct pipe *pipe_peer; /* link with other direction */
- u_int pipe_state; /* pipe status info */
- int pipe_busy; /* busy flag, mostly to handle rundown sanely */
- TAILQ_HEAD(,eventqelt) pipe_evlist;
- lck_mtx_t *pipe_mtxp; /* shared mutex between both pipes */
- struct timespec st_atimespec; /* time of last access */
- struct timespec st_mtimespec; /* time of last data modification */
- struct timespec st_ctimespec; /* time of last status change */
- struct label *pipe_label; /* pipe MAC label - shared */
+ struct selinfo pipe_sel; /* for compat with select */
+ pid_t pipe_pgid; /* information for async I/O */
+ struct pipe *pipe_peer; /* link with other direction */
+ u_int pipe_state; /* pipe status info */
+ int pipe_busy; /* busy flag, mostly to handle rundown sanely */
+ TAILQ_HEAD(, eventqelt) pipe_evlist;
+ lck_mtx_t *pipe_mtxp; /* shared mutex between both pipes */
+ struct timespec st_atimespec; /* time of last access */
+ struct timespec st_mtimespec; /* time of last data modification */
+ struct timespec st_ctimespec; /* time of last status change */
+ struct label *pipe_label; /* pipe MAC label - shared */
};
-#define PIPE_MTX(pipe) ((pipe)->pipe_mtxp)
+#define PIPE_MTX(pipe) ((pipe)->pipe_mtxp)
-#define PIPE_LOCK(pipe) lck_mtx_lock(PIPE_MTX(pipe))
-#define PIPE_UNLOCK(pipe) lck_mtx_unlock(PIPE_MTX(pipe))
+#define PIPE_LOCK(pipe) lck_mtx_lock(PIPE_MTX(pipe))
+#define PIPE_UNLOCK(pipe) lck_mtx_unlock(PIPE_MTX(pipe))
#define PIPE_LOCK_ASSERT(pipe, type) LCK_MTX_ASSERT(PIPE_MTX(pipe), (type))
__BEGIN_DECLS
extern int pipe_stat(struct pipe *, void *, int);
__END_DECLS
-#endif /* KERNEL */
+#endif /* KERNEL */
#endif /* !_SYS_PIPE_H_ */
projects / apple / xnu.git / blobdiff