/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _ISCSI_THREAD_H
#define _ISCSI_THREAD_H

/*
 * Block comment which describes the contents of this file.
 */

#ifdef __cplusplus
extern "C" {
#endif

#include <sys/types.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>

#define SIG_ISCSI_THREAD                0x54485244

#define ISCSI_TH_MAX_NAME_LEN           32

#define ISCSI_THREAD_SIGNAL_KILL        0x00000001
#define ISCSI_THREAD_SIGNAL_WAKEUP      0x00000002

#define ISCSI_THREAD_STATE_STOPPED      0x00000001
#define ISCSI_THREAD_STATE_STOPPING     0x00000002
#define ISCSI_THREAD_STATE_STARTED      0x00000004
#define ISCSI_THREAD_STATE_STARTING     0x00000008
#define ISCSI_THREAD_STATE_DESTROYING   0x00000010

struct _iscsi_thread;

typedef void (*iscsi_thread_ep_t)(struct _iscsi_thread *, void *);

typedef struct _iscsi_thread {
        uint32_t                signature;
        uint32_t                state;
        ddi_taskq_t             *tq;
        iscsi_thread_ep_t       entry_point;
        void                    *arg;
        dev_info_t              *dip;
        struct {
                uint32_t        bitmap;
                kmutex_t        mtx;
                kcondvar_t      cdv;
        } sign;
        struct {
                kmutex_t        mtx;
        } mgnt;
} iscsi_thread_t;

iscsi_thread_t *
iscsi_thread_create(
        dev_info_t              *dip,
        char                    *name,
        iscsi_thread_ep_t       entry_point,
        void                    *arg
);

void
iscsi_thread_destroy(
        iscsi_thread_t          *thread
);

boolean_t
iscsi_thread_start(
        iscsi_thread_t          *thread
);

boolean_t
iscsi_thread_stop(
        iscsi_thread_t          *thread
);

void
iscsi_thread_send_kill(
        iscsi_thread_t          *thread
);

boolean_t
iscsi_thread_send_wakeup(
        iscsi_thread_t          *thread
);

int
iscsi_thread_wait(
        iscsi_thread_t          *thread,
        clock_t                 timeout
);

uint32_t
iscsi_thread_check_signals(
        iscsi_thread_t          *thread
);

#ifdef __cplusplus
}
#endif

#endif /* _ISCSI_THREAD_H */