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Rev 3022 Rev 4055
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 *
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 *
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 * @param rwl Reader/Writer lock.
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 * @param rwl Reader/Writer lock.
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 */
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 */
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void rwlock_initialize(rwlock_t *rwl) {
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void rwlock_initialize(rwlock_t *rwl) {
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    spinlock_initialize(&rwl->lock, "rwlock_t");
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    spinlock_initialize(&rwl->lock, "rwlock_t");
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    mutex_initialize(&rwl->exclusive);
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    mutex_initialize(&rwl->exclusive, MUTEX_PASSIVE);
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    rwl->readers_in = 0;
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    rwl->readers_in = 0;
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}
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}
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/** Acquire reader/writer lock for reading
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/** Acquire reader/writer lock for reading
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 *
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 *
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             * events happen atomically when rwl->lock is held.)
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             * events happen atomically when rwl->lock is held.)
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             */
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             */
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            interrupts_restore(ipl);
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            interrupts_restore(ipl);
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            break;
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            break;
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        case ESYNCH_OK_ATOMIC:
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        case ESYNCH_OK_ATOMIC:
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            panic("_mutex_lock_timeout()==ESYNCH_OK_ATOMIC\n");
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            panic("_mutex_lock_timeout() == ESYNCH_OK_ATOMIC.");
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            break;
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            break;
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        default:
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        default:
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            panic("invalid ESYNCH\n");
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            panic("Invalid ESYNCH.");
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            break;
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            break;
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        }
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        }
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        return rc;
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        return rc;
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    }
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    }
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