| - we should probably extend pthread_mutexattr_t with a field to create a |
| single linked list of all instances. This requires changing the |
| pthread_mutexattr_* functions. |
| |
| |
| - a new attribute for mutexes: number of times we spin before calling |
| sys_futex |
| |
| - for adaptive mutexes: when releasing, determine whether somebody spins. |
| If yes, for a short time release lock. If someone else locks no wakeup |
| syscall needed. |
| |
| |
| |
| - test with threaded process terminating and semadj (?) being applied |
| only after all threads are gone |
| |
| |
| |
| - semaphore changes: |
| |
| - sem_post should only wake one thread and only when the state of |
| the semaphore changed from 0 to 1 |
| |
| this also requires that sem_wait and sem_timedwait don't drop the |
| post if they get canceled. |
| |
| - possibly add counter field. This requires reviving the |
| differences between old and new semaphose funtions. The old ones |
| stay as they are now. The new once can use an additional field |
| wich is the counter for the number of waiters |