Dan Fandrich, Thank you for you reply. Here is the
/usr/include/sys/rw_lock..file for HPUX 11.11 for your potential review if you
have the time. The offending lines are around line 169. You may contact me at
[email protected] or [email protected] if you have any questions.
Thank you for all of your help the past week and half.
/* @(#) rw_lock.h $Date: 2001/02/02 16:37:40 $Revision: r11.11/1 PATCH_11.11
(PHKL_23302)
*/
/*
* BEGIN_DESC
*
* File:
* common/sys/rw_lock.h
*
* Purpose:
* Header file for kernel read-write locks implemented in sys/rw_lock.c.
* The HP-UX read-write locks were ported (with some modifications)
* from OSF/1, hence all the copyrights from the OSF/1 code.
*
* Classification: Release to Release Consistency Req:
* <<please select one of the following:>>
* kernel subsystem private none
* kernel private none
* kernel 3rd party private limited source
* public binary & source
*
* BE header: yes
*
* Shipped: yes
* /usr/include/sys/rw_lock.h
* /usr/conf/sys/rw_lock.h
*
* <<please delete the following note if this is a "public" header>>
* NOTE:
* This header file contains information specific to the internals
* of the HP-UX implementation. The contents of this header file
* are subject to change without notice. Such changes may affect
* source code, object code, or binary compatibility between
* releases of HP-UX. Code which uses the symbols contained within
* this header file is inherently non-portable (even between HP-UX
* implementations).
*
* END_DESC
*/
/*
* Copyright (c) 1990, OPEN SOFTWARE FOUNDATION, INC.
* Copyright (c) 1987,1988,1989 Carnegie-Mellon University
* Copyright (c) 1988,1989 Encore Computer Corporation.
* Copyright (c) 1985, Avadis Tevanian, Jr., Michael Wayne Young
*/
#ifndef _RW_LOCK_INCLUDED
#define _RW_LOCK_INCLUDED
#include <sys/spinlock.h>
#include <sys/sem_utl.h>
#include <sys/types.h>
#ifdef SEMAPHORE_DEBUG
#define MACH_LTRACKS
#define LOCK_STATS
#endif /* SEMAPHORE_DEBUG */
#define read_lock_held(_lock) (owns_rw_lock(_lock) && (_lock)->read_count)
#define write_lock_held(_lock) (owns_rw_lock(_lock) && !(_lock)->read_count \
&& ((_lock)->want_write || (_lock)->want_upgrade))
#define lock_held(_lock) (read_lock_held(_lock) || write_lock_held(_lock))
struct rw_lock {
lock_t *interlock; /* Spinlock for accessing rw_lock struct */
unsigned int delay; /* Delay flag, <> 0 delays before block */
unsigned int write_waiters; /* Write-request sleepers count */
volatile int read_count; /* Read access count */
volatile char want_write; /* kthread has or wants write access */
volatile char want_upgrade; /* kthread has or wants upgrade */
char waiting; /* kthread waiting for some access */
char rwl_flags; /* kthread non-swappable while lock
* held flag or prio ceiling to be done
* flag
*/
struct kthread *l_kthread; /* Last kthread to acquire lock */
#ifdef SEMAPHORE_DEBUG
unsigned short order; /* Order for deadlock avoidance checks */
char *name; /* Name associated with lock */
unsigned char deadlock_safe; /* Flag indiacates if deadlock safe order */
#endif /* SEMAPHORE_DEBUG */
#ifdef MACH_LTRACKS
uintptr_t lck_addr; /* RP of last caller to acquire lock */
uintptr_t unlck_addr; /* RP of last caller to release lock */
#endif /* MACH_LTRACKS */
#ifdef LOCK_STATS
unsigned int write_tries; /* lock_write() calls */
unsigned int write_flag_waits; /* " wait to get want_write flag */
unsigned int write_flag_rewaits; /* " lost race to get want_write flag */
unsigned int write_waits; /* " wait for write access */
unsigned int write_rewaits; /* " lost race to get write access */
unsigned int read_tries; /* lock_read() calls */
unsigned int read_waits; /* " wait for read access */
unsigned int read_rewaits; /* " lost race to get read access */
unsigned int write_cond_tries; /* lock_try_write() calls */
unsigned int write_cond_fails; /* " failed */
unsigned int read_cond_tries; /* lock_try_read() calls */
unsigned int read_cond_fails; /* " failed */
unsigned int upgrade_tries; /* lock_(try_)read_to_write() calls */
unsigned int upgrade_fails; /* " failed */
unsigned int upgrade_waits; /* " wait for upgrade access */
unsigned int upgrade_rewaits; /* " lost race to get upgrade access */
unsigned long lock_wait_min; /* Longest time blocked on lock */
unsigned long lock_wait_max; /* Longest time blocked on lock */
unsigned long lock_wait_sum[2]; /* Total time blocked on lock */
unsigned int lock_max_reads; /* Maximum number of active readers */
#endif /* LOCK_STATS */
};
#define _RWLOCK_T
typedef struct rw_lock rw_lock_data_t;
typedef struct rw_lock *rw_lock_t;
typedef void *rw_lock_key_t; /* Opaque type to match disown/claim */
#define RW_NO_DELAY 0x0
#define RW_DELAY 0xffffffff
/*
* Flags for what process(es) are waiting (blocked) on.
*/
#define RW_WRITE_QUEUE 0x1
#define RW_WRITE_LOCK 0x2
#define RW_UPGRADE_LOCK 0x4
#define RW_READ_LOCK 0x8
#define MAX_RW_LOCK 64
extern void lock_init3 __((rw_lock_t,char,unsigned int,char,int,char*));
extern void lock_write __((rw_lock_t));
extern void lock_read __((rw_lock_t));
extern void lock_done __((rw_lock_t));
extern int lock_read_to_write __((rw_lock_t));
extern void lock_write_to_read __((rw_lock_t));
extern int lock_try_write __((rw_lock_t));
extern rw_lock_key_t lock_disown __((rw_lock_t, rw_lock_key_t));
extern void lock_claim __((rw_lock_t, rw_lock_key_t));
extern void rw_lock_initialize __((void));
extern void rwlock_init4 __((rw_lock_t,unsigned int,int,int,char*));
/* #ifdef notdef */
/*
* Not supported in HP-UX
*/
extern int lock_try_read __((rw_lock_t));
extern int lock_try_read_to_write __((rw_lock_t));
/* #endif */ /* notdef */
#define lock_read_done(l) lock_done(l)
#define lock_write_done(l) lock_done(l)
/*
* For source compatibility, need to continue defining TRUE and FALSE for
* user-level applications. Although this file defines a kernel only service,
* some user-level applications are indirectly including this file and
* depending on the defines for TRUE and FALSE. These defines need to
* remain until all the user-level issues have been handled.
*/
#ifndef _KERNEL
#ifndef TRUE
#define TRUE 1
#define FALSE 0
#else
#if ((TRUE != 1) || (FALSE != 0))
This is probably not a good thing....
#endif
#endif /* !TRUE */
#endif /* !_KERNEL */
#define RWLCK_SUCCESS 1
#define RWLCK_FAILURE 0
#define RWLCK_SLEEP 0x01 /* Obsolete , used for old lock_init3() */
#define RWLCK_NOSWAP 0x01
#define RWLCK_PRIOCEIL 0x02
#define RWLCK_CANSLEEP 0x04
#define RWLCK_CANDISOWN 0x08
#define RWLCK_ALLFLAGS (RWLCK_NOSWAP|RWLCK_PRIOCEIL| \
RWLCK_CANSLEEP|RWLCK_CANDISOWN)
#endif /* _RW_LOCK_INCLUDED */ -------------------------------------------------------------------
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