| 1 | /* copied from linux/wait.h */
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| 2 |
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| 3 | #ifndef wait_event_timeout
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| 4 | #define wait_event_timeout(wq, condition, timeout) \
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| 5 | ({ \
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| 6 | long __ret = timeout; \
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| 7 | if (!(condition)) \
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| 8 | __wait_event_timeout(wq, condition, __ret); \
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| 9 | __ret; \
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| 10 | })
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| 11 |
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| 12 | #define __wait_event_timeout(wq, condition, ret) \
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| 13 | do { \
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| 14 | wait_queue_t __wait; \
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| 15 | init_waitqueue_entry(&__wait, current); \
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| 16 | \
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| 17 | add_wait_queue(&wq, &__wait); \
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| 18 | for (;;) { \
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| 19 | set_current_state(TASK_UNINTERRUPTIBLE); \
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| 20 | if (condition) \
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| 21 | break; \
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| 22 | ret = schedule_timeout(ret); \
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| 23 | if (!ret) \
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| 24 | break; \
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| 25 | } \
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| 26 | current->state = TASK_RUNNING; \
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| 27 | remove_wait_queue(&wq, &__wait); \
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| 28 | } while (0)
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| 29 | #endif
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| 30 |
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| 31 | #ifndef wait_event_interruptible_timeout
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| 32 |
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| 33 | /* We need to define these ones here as they only exist in kernels 2.6 and up */
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| 34 |
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| 35 | #define __wait_event_interruptible_timeout(wq, condition, timeout, ret) \
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| 36 | do { \
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| 37 | int __ret = 0; \
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| 38 | if (!(condition)) { \
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| 39 | wait_queue_t __wait; \
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| 40 | unsigned long expire; \
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| 41 | init_waitqueue_entry(&__wait, current); \
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| 42 | \
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| 43 | expire = timeout + jiffies; \
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| 44 | add_wait_queue(&wq, &__wait); \
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| 45 | for (;;) { \
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| 46 | set_current_state(TASK_INTERRUPTIBLE); \
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| 47 | if (condition) \
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| 48 | break; \
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| 49 | if (jiffies > expire) { \
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| 50 | ret = jiffies - expire; \
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| 51 | break; \
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| 52 | } \
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| 53 | if (!signal_pending(current)) { \
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| 54 | schedule_timeout(timeout); \
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| 55 | continue; \
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| 56 | } \
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| 57 | ret = -ERESTARTSYS; \
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| 58 | break; \
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| 59 | } \
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| 60 | current->state = TASK_RUNNING; \
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| 61 | remove_wait_queue(&wq, &__wait); \
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| 62 | } \
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| 63 | } while (0)
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| 64 |
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| 65 | /*
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| 66 | retval == 0; condition met; we're good.
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| 67 | retval < 0; interrupted by signal.
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| 68 | retval > 0; timed out.
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| 69 | */
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| 70 | #define wait_event_interruptible_timeout(wq, condition, timeout) \
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| 71 | ({ \
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| 72 | int __ret = 0; \
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| 73 | if (!(condition)) \
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| 74 | __wait_event_interruptible_timeout(wq, condition, \
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| 75 | timeout, __ret); \
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| 76 | __ret; \
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| 77 | })
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| 78 |
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| 79 | #endif /* wait_event_interruptible_timeout not defined */
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