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| Rev | Author | Line No. | Line |
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| 171 | jermar | 1 | /* |
| 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 | |||
| 1264 | jermar | 29 | /** |
| 30 | * @file preemption.c |
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| 31 | * @brief Preemption control. |
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| 32 | */ |
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| 33 | |||
| 171 | jermar | 34 | #include <preemption.h> |
| 35 | #include <arch.h> |
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| 177 | jermar | 36 | #include <arch/asm.h> |
| 171 | jermar | 37 | #include <arch/barrier.h> |
| 177 | jermar | 38 | #include <debug.h> |
| 171 | jermar | 39 | |
| 411 | jermar | 40 | /** Increment preemption disabled counter. */ |
| 171 | jermar | 41 | void preemption_disable(void) |
| 42 | { |
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| 177 | jermar | 43 | THE->preemption_disabled++; |
| 44 | memory_barrier(); |
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| 171 | jermar | 45 | } |
| 46 | |||
| 411 | jermar | 47 | /** Decrement preemption disabled counter. */ |
| 171 | jermar | 48 | void preemption_enable(void) |
| 49 | { |
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| 177 | jermar | 50 | ASSERT(THE->preemption_disabled); |
| 51 | memory_barrier(); |
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| 52 | THE->preemption_disabled--; |
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| 171 | jermar | 53 | } |