1 files changed, 74 insertions, 0 deletions
diff --git a/servers/slapd/alock.h b/servers/slapd/alock.h
new file mode 100644
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+++ b/servers/slapd/alock.h
@@ -0,0 +1,74 @@
+/* alock.h - access lock header */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2005-2021 The OpenLDAP Foundation.
+ * Portions Copyright 2004-2005 Symas Corporation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was initially developed by Emily Backes at Symas
+ * Corporation for inclusion in OpenLDAP Software.
+ */
+
+#ifndef _ALOCK_H_
+#define _ALOCK_H_
+
+#include "portable.h"
+#include <ac/time.h>
+#include <ac/unistd.h>
+
+/* environment states (all the slots together) */
+#define ALOCK_CLEAN		(0)
+#define ALOCK_RECOVER	(1)
+#define ALOCK_BUSY		(2)
+#define ALOCK_UNSTABLE	(3)
+
+/* lock user types and states */
+#define ALOCK_UNLOCKED	(0)
+#define ALOCK_LOCKED	(1)
+#define ALOCK_UNIQUE	(2)
+#define ALOCK_DIRTY		(3)
+
+#define ALOCK_SMASK		3
+
+/* lock/state where recovery is not available */
+#define	ALOCK_NOSAVE	4
+
+/* constants */
+#define ALOCK_SLOT_SIZE		(1024)
+#define ALOCK_SLOT_IATTRS	(4)
+#define ALOCK_MAX_APPNAME	(ALOCK_SLOT_SIZE - 8 * ALOCK_SLOT_IATTRS)
+#define ALOCK_MAGIC			(0x12345678)
+
+LDAP_BEGIN_DECL
+
+typedef struct alock_info {
+	int al_fd;
+	int al_slot;
+} alock_info_t;
+
+typedef struct alock_slot {
+	unsigned int al_lock;
+	time_t al_stamp;
+	pid_t al_pid;
+	char * al_appname;
+} alock_slot_t;
+
+LDAP_SLAPD_F (int) alock_open LDAP_P(( alock_info_t * info, const char * appname,
+	const char * envdir, int locktype ));
+LDAP_SLAPD_F (int) alock_scan LDAP_P(( alock_info_t * info ));
+LDAP_SLAPD_F (int) alock_close LDAP_P(( alock_info_t * info, int nosave ));
+LDAP_SLAPD_F (int) alock_recover LDAP_P(( alock_info_t * info ));
+
+LDAP_END_DECL
+
+#endif