//----------------------------------------------------------------------------//
//                           GNU GPL OS/K                                     //
//                                                                            //
//  Desc:       Buffer library                                                //
//                                                                            //
//                                                                            //
//  Copyright © 2018-2019 The OS/K Team                                       //
//                                                                            //
//  This file is part of OS/K.                                                //
//                                                                            //
//  OS/K 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         //
//  any later version.                                                        //
//                                                                            //
//  OS/K 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 OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
//----------------------------------------------------------------------------//

#include <lib/buf.h>

//
// Closes a buffer, not flushing unless the proper flag is set
//
error_t BCloseBuf(Buffer_t *buf)
{
    assert_always(buf);
    ExAcquireLock(&buf->lock);

    if (buf->flags & BF_FONCLOSE) {
        BFlushBuf(buf);
    }

    if (buf->flags & BF_SALLOC && buf->buf) {
        free(buf->buf);
    }

    buf->buf = buf->rp = buf->wp = NULL;
    buf->flags = buf->state = buf->size = 0;

    ExReleaseLock(&buf->lock);
    
    if (buf->flags & BF_BALLOC) {
        free(buf);
    }

    return EOK;
}