| 1 | /*
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| 2 | * Copyright (c) 2005 Jakub Jermar
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup kernel_generic_proc
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| 30 | * @{
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| 31 | */
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| 32 |
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| 33 | /**
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| 34 | * @file
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| 35 | * @brief CURRENT structure functions.
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| 36 | *
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| 37 | * This file contains functions to manage the CURRENT structure.
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| 38 | * The CURRENT structure exists at the base address of every kernel
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| 39 | * stack and carries information about current settings
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| 40 | * (e.g. current CPU, current thread, task and address space
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| 41 | * and current preemption counter).
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| 42 | */
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| 43 |
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| 44 | #include <arch.h>
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| 45 | #include <assert.h>
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| 46 |
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| 47 | /** Initialize CURRENT structure
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| 48 | *
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| 49 | * Initialize CURRENT structure passed as argument.
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| 50 | *
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| 51 | * @param the CURRENT structure to be initialized.
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| 52 | *
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| 53 | */
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| 54 | void current_initialize(current_t *the)
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| 55 | {
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| 56 | the->preemption = 0;
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| 57 | the->mutex_locks = 0;
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| 58 | the->cpu = NULL;
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| 59 | the->thread = NULL;
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| 60 | the->task = NULL;
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| 61 | the->as = NULL;
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| 62 | the->magic = MAGIC;
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| 63 | }
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| 64 |
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| 65 | /** Copy CURRENT structure
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| 66 | *
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| 67 | * Copy the source CURRENT structure to the destination CURRENT structure.
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| 68 | *
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| 69 | * @param src The source CURRENT structure.
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| 70 | * @param dst The destination CURRENT structure.
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| 71 | *
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| 72 | */
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| 73 | _NO_TRACE void current_copy(current_t *src, current_t *dst)
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| 74 | {
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| 75 | assert(src->magic == MAGIC);
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| 76 | *dst = *src;
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| 77 | }
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| 78 |
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| 79 | /** @}
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| 80 | */
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