diff options
| author | greg@kroah.com <greg@kroah.com> | 2003-08-05 01:26:59 -0700 |
|---|---|---|
| committer | Greg KH <gregkh@suse.de> | 2005-04-26 21:01:40 -0700 |
| commit | 5ac4a56b39fed9d95850161864befe612b1a538e (patch) | |
| tree | cb9ccdb64bbae97f42c94e5d99734709da77703b /tdb/spinlock.h | |
| parent | e09292061689b59da68f05eb7a74e353c283078f (diff) | |
[PATCH] Added tdb code from latest cvs version in the samba tree
Diffstat (limited to 'tdb/spinlock.h')
| -rw-r--r-- | tdb/spinlock.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/tdb/spinlock.h b/tdb/spinlock.h new file mode 100644 index 0000000000..8b0e833ff5 --- /dev/null +++ b/tdb/spinlock.h @@ -0,0 +1,55 @@ +#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); + +#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); +#endif + +#endif |