first public release of samba4 code

(This used to be commit b0510b5428b3461aeb9bbe3cc95f62fc73e2b97f)

1 files changed, 55 insertions, 0 deletions

diff --git a/source4/tdb/spinlock.h b/source4/tdb/spinlock.h
new file mode 100644
index 0000000000..d6a2ac6eb8
--- /dev/null
+++ b/source4/tdb/spinlock.h
@@ -0,0 +1,55 @@
+#ifndef __SPINLOCK_H__
+#define __SPINLOCK_H__
+
+#if 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