mirror of
https://github.com/samba-team/samba.git
synced 2024-12-23 17:34:34 +03:00
f4d9600e68
I still wouldn't recommend them, but at least they now work
(This used to be commit 76992e7d16)
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
#ifndef __SPINLOCK_H__
|
|
#define __SPINLOCK_H__
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include "tdb.h"
|
|
|
|
#ifdef USE_SPINLOCKS
|
|
|
|
#define RWLOCK_BIAS 0x1000UL
|
|
|
|
/* OS SPECIFIC */
|
|
#define MAX_BUSY_LOOPS 1000
|
|
#undef USE_SCHED_YIELD
|
|
|
|
/* ARCH SPECIFIC */
|
|
/* We should make sure these are padded to a cache line */
|
|
#if defined(SPARC_SPINLOCKS)
|
|
typedef volatile char spinlock_t;
|
|
#elif defined(POWERPC_SPINLOCKS)
|
|
typedef volatile unsigned long spinlock_t;
|
|
#elif defined(INTEL_SPINLOCKS)
|
|
typedef volatile int spinlock_t;
|
|
#elif defined(MIPS_SPINLOCKS)
|
|
typedef volatile unsigned long spinlock_t;
|
|
#else
|
|
#error Need to implement spinlock code in spinlock.h
|
|
#endif
|
|
|
|
typedef struct {
|
|
spinlock_t lock;
|
|
volatile int count;
|
|
} tdb_rwlock_t;
|
|
|
|
int tdb_spinlock(TDB_CONTEXT *tdb, int list, int rw_type);
|
|
int tdb_spinunlock(TDB_CONTEXT *tdb, int list, int rw_type);
|
|
int tdb_create_rwlocks(int fd, unsigned int hash_size);
|
|
int tdb_clear_spinlocks(TDB_CONTEXT *tdb);
|
|
|
|
#define TDB_SPINLOCK_SIZE(hash_size) (((hash_size) + 1) * sizeof(tdb_rwlock_t))
|
|
|
|
#else /* !USE_SPINLOCKS */
|
|
#if 0
|
|
#define tdb_create_rwlocks(fd, hash_size) 0
|
|
#define tdb_spinlock(tdb, list, rw_type) (-1)
|
|
#define tdb_spinunlock(tdb, list, rw_type) (-1)
|
|
#else
|
|
int tdb_spinlock(TDB_CONTEXT *tdb, int list, int rw_type);
|
|
int tdb_spinunlock(TDB_CONTEXT *tdb, int list, int rw_type);
|
|
int tdb_create_rwlocks(int fd, unsigned int hash_size);
|
|
#endif
|
|
int tdb_clear_spinlocks(TDB_CONTEXT *tdb);
|
|
#define TDB_SPINLOCK_SIZE(hash_size) 0
|
|
|
|
#endif
|
|
|
|
#endif
|