1 files changed, 76 insertions, 0 deletions
diff --git a/storage/maria/lockman.h b/storage/maria/lockman.h
new file mode 100644
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--- /dev/null
+++ b/storage/maria/lockman.h
@@ -0,0 +1,76 @@
+/* Copyright (C) 2006 MySQL AB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
+
+#ifndef _lockman_h
+#define _lockman_h
+
+/*
+  Lock levels:
+  ^^^^^^^^^^^
+
+  N    - "no lock", not a lock, used sometimes internally to simplify the code
+  S    - Shared
+  X    - eXclusive
+  IS   - Intention Shared
+  IX   - Intention eXclusive
+  SIX  - Shared + Intention eXclusive
+  LS   - Loose Shared
+  LX   - Loose eXclusive
+  SLX  - Shared + Loose eXclusive
+  LSIX - Loose Shared + Intention eXclusive
+*/
+enum lockman_lock_type { N, S, X, IS, IX, SIX, LS, LX, SLX, LSIX, LOCK_TYPE_LAST };
+
+struct lockman_lock;
+
+typedef struct st_lock_owner LOCK_OWNER;
+struct st_lock_owner {
+  LF_PINS  *pins;           /* must be allocated from lockman's pinbox       */
+  struct lockman_lock *all_locks; /* a LIFO                                  */
+  LOCK_OWNER  *waiting_for;
+  pthread_cond_t  *cond;    /* transactions waiting for this, wait on 'cond' */
+  pthread_mutex_t *mutex;   /* mutex is required to use 'cond'               */
+  uint16    loid;
+};
+
+typedef LOCK_OWNER *loid_to_lo_func(uint16);
+typedef struct {
+  LF_DYNARRAY array;                    /* hash itself */
+  LF_ALLOCATOR alloc;                   /* allocator for elements */
+  int32 volatile size;                  /* size of array */
+  int32 volatile count;                 /* number of elements in the hash */
+  uint lock_timeout;
+  loid_to_lo_func *loid_to_lo;
+} LOCKMAN;
+#define DIDNT_GET_THE_LOCK 0
+enum lockman_getlock_result {
+  NO_MEMORY_FOR_LOCK=1, DEADLOCK, LOCK_TIMEOUT,
+  GOT_THE_LOCK,
+  GOT_THE_LOCK_NEED_TO_LOCK_A_SUBRESOURCE,
+  GOT_THE_LOCK_NEED_TO_INSTANT_LOCK_A_SUBRESOURCE
+};
+
+void lockman_init(LOCKMAN *, loid_to_lo_func *, uint);
+void lockman_destroy(LOCKMAN *);
+enum lockman_getlock_result lockman_getlock(LOCKMAN *lm, LOCK_OWNER *lo,
+                                            uint64 resource,
+                                            enum lockman_lock_type lock);
+int lockman_release_locks(LOCKMAN *, LOCK_OWNER *);
+
+#ifdef EXTRA_DEBUG
+void print_lockhash(LOCKMAN *lm);
+#endif
+
+#endif