| 1 | /** @file
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| 2 | *
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| 3 | */
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| 4 |
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| 5 | /*
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| 6 | * Copyright (C) 2006 InnoTek Systemberatung GmbH
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| 7 | *
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| 8 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 9 | * available from http://www.virtualbox.org. This file is free software;
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| 10 | * you can redistribute it and/or modify it under the terms of the GNU
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| 11 | * General Public License as published by the Free Software Foundation,
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| 12 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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| 13 | * distribution. VirtualBox OSE is distributed in the hope that it will
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| 14 | * be useful, but WITHOUT ANY WARRANTY of any kind.
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| 15 | *
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| 16 | * If you received this file as part of a commercial VirtualBox
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| 17 | * distribution, then only the terms of your commercial VirtualBox
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| 18 | * license agreement apply instead of the previous paragraph.
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| 19 | */
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| 20 |
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| 21 |
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| 22 | #ifndef wait_event_timeout
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| 23 | #define wait_event_timeout(wq, condition, timeout) \
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| 24 | ({ \
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| 25 | long __ret = timeout; \
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| 26 | if (!(condition)) \
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| 27 | __wait_event_timeout(wq, condition, __ret); \
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| 28 | __ret; \
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| 29 | })
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| 30 |
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| 31 | #define __wait_event_timeout(wq, condition, ret) \
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| 32 | do { \
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| 33 | wait_queue_t __wait; \
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| 34 | init_waitqueue_entry(&__wait, current); \
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| 35 | \
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| 36 | add_wait_queue(&wq, &__wait); \
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| 37 | for (;;) { \
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| 38 | set_current_state(TASK_UNINTERRUPTIBLE); \
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| 39 | if (condition) \
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| 40 | break; \
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| 41 | ret = schedule_timeout(ret); \
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| 42 | if (!ret) \
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| 43 | break; \
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| 44 | } \
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| 45 | current->state = TASK_RUNNING; \
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| 46 | remove_wait_queue(&wq, &__wait); \
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| 47 | } while (0)
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| 48 | #endif
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