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/*
Unix SMB/CIFS implementation.
global locks based on dbwrap and messaging
Copyright (C) 2009 by Volker Lendecke
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; either version 3 of the License, or
(at your option) any later version.
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, see <http://www.gnu.org/licenses/>.
*/
#ifndef _G_LOCK_H_
#define _G_LOCK_H_
#include "dbwrap/dbwrap.h"
struct g_lock_ctx;
struct messaging_context;
enum g_lock_type {
G_LOCK_READ,
G_LOCK_WRITE,
G_LOCK_UPGRADE,
G_LOCK_DOWNGRADE,
};
struct g_lock_ctx *g_lock_ctx_init_backend(
TALLOC_CTX *mem_ctx,
struct messaging_context *msg,
struct db_context **backend);
void g_lock_set_lock_order(struct g_lock_ctx *ctx,
enum dbwrap_lock_order lock_order);
struct g_lock_ctx *g_lock_ctx_init(TALLOC_CTX *mem_ctx,
struct messaging_context *msg);
struct tevent_req *g_lock_lock_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct g_lock_ctx *ctx,
TDB_DATA key,
enum g_lock_type type);
NTSTATUS g_lock_lock_recv(struct tevent_req *req);
NTSTATUS g_lock_lock(struct g_lock_ctx *ctx, TDB_DATA key,
enum g_lock_type lock_type, struct timeval timeout);
NTSTATUS g_lock_unlock(struct g_lock_ctx *ctx, TDB_DATA key);
NTSTATUS g_lock_writev_data(
struct g_lock_ctx *ctx,
TDB_DATA key,
const TDB_DATA *dbufs,
size_t num_dbufs);
NTSTATUS g_lock_write_data(struct g_lock_ctx *ctx, TDB_DATA key,
const uint8_t *buf, size_t buflen);
int g_lock_locks(struct g_lock_ctx *ctx,
int (*fn)(TDB_DATA key, void *private_data),
void *private_data);
struct tevent_req *g_lock_dump_send(
TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct g_lock_ctx *ctx,
TDB_DATA key,
void (*fn)(struct server_id exclusive,
size_t num_shared,
struct server_id *shared,
const uint8_t *data,
size_t datalen,
void *private_data),
void *private_data);
NTSTATUS g_lock_dump_recv(struct tevent_req *req);
NTSTATUS g_lock_dump(struct g_lock_ctx *ctx,
TDB_DATA key,
void (*fn)(struct server_id exclusive,
size_t num_shared,
struct server_id *shared,
const uint8_t *data,
size_t datalen,
void *private_data),
void *private_data);
int g_lock_seqnum(struct g_lock_ctx *ctx);
struct tevent_req *g_lock_watch_data_send(
TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct g_lock_ctx *ctx,
TDB_DATA key,
struct server_id blocker);
NTSTATUS g_lock_watch_data_recv(
struct tevent_req *req,
bool *blockerdead,
struct server_id *blocker);
void g_lock_wake_watchers(struct g_lock_ctx *ctx, TDB_DATA key);
#endif
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