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LKM: Initial code for psynch_mutexdrop
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src/lkm/psynch/psynch_mutex.c
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src/lkm/psynch/psynch_mutex.c
···
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}
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waiter.wakeup = 0;
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list_add(&waiter.entry, &mutex->waiting);
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list_add_tail(&waiter.entry, &mutex->waiting);
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spin_unlock(&task->mutex_wq_lock);
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···
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}
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int psynch_mutexdrop_trap(mach_task_t* task,
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struct psynch_mutexdrop_args* args)
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struct psynch_mutexdrop_args* in_args)
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{
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pthread_mutex_t* mutex;
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struct psynch_mutexdrop_args args;
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if (copy_from_user(&args, in_args, sizeof(args)))
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return -EFAULT;
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spin_lock(&task->mutex_wq_lock);
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mutex = mutex_get(task, args.mutex);
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mutex->mgen = args.mgen;
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if (!list_empty(&mutex->waiting))
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{
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struct pthread_waiter* waiter;
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waiter = list_first_entry(&mutex->waiting, struct pthread_waiter,
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entry);
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waiter->wakeup = 1;
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wake_up_interruptible(&mutex->wq);
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}
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mutex_put(task, mutex);
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spin_unlock(&task->mutex_wq_lock);
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return 0;
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}
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