/*
* Copyright (c) 2005 Jakub Jermar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup kernel_generic_proc
* @{
*/
/**
* @file
* @brief CURRENT structure functions.
*
* This file contains functions to manage the CURRENT structure.
* The CURRENT structure exists at the base address of every kernel
* stack and carries information about current settings
* (e.g. current CPU, current thread, task and address space
* and current preemption counter).
*/
#include <arch.h>
#include <assert.h>
/** Initialize CURRENT structure
*
* Initialize CURRENT structure passed as argument.
*
* @param the CURRENT structure to be initialized.
*
*/
void current_initialize(current_t *the)
{
the->preemption = 0;
the->mutex_locks = 0;
the->cpu = NULL;
the->thread = NULL;
the->task = NULL;
the->as = NULL;
the->magic = MAGIC;
}
/** Copy CURRENT structure
*
* Copy the source CURRENT structure to the destination CURRENT structure.
*
* @param src The source CURRENT structure.
* @param dst The destination CURRENT structure.
*
*/
_NO_TRACE void current_copy(current_t *src, current_t *dst)
{
assert(src->magic == MAGIC);
*dst = *src;
}
/** @}
*/