git://sourceware.org / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 76a50749 UD |
1 | - we should probably extend pthread_mutexattr_t with a field to create a |
| 2 | single linked list of all instances. This requires changing the | |
| 3 | pthread_mutexattr_* functions. | |
| 4 | ||
| 5 | ||
| 6 | - a new attribute for mutexes: number of times we spin before calling | |
| 7 | sys_futex | |
| 8 | ||
| 7d4722e3 UD |
9 | - for adaptive mutexes: when releasing, determine whether somebody spins. |
| 10 | If yes, for a short time release lock. If someone else locks no wakeup | |
| 11 | syscall needed. | |
| 12 | ||
| 76a50749 UD |
13 | |
| 14 | ||
| c22b52fa UD |
15 | - test with threaded process terminating and semadj (?) being applied |
| 16 | only after all threads are gone | |
| 2c1d6172 UD |
17 | |
| 18 | ||
| 19 | ||
| 20 | - semaphore changes: | |
| 21 | ||
| 22 | - sem_post should only wake one thread and only when the state of | |
| 23 | the semaphore changed from 0 to 1 | |
| 24 | ||
| 25 | this also requires that sem_wait and sem_timedwait don't drop the | |
| 26 | post if they get canceled. | |
| 27 | ||
| 28 | - possibly add counter field. This requires reviving the | |
| 7f0d9e61 PP |
29 | differences between old and new semaphore functions. The old ones |
| 30 | stay as they are now. The new ones can use an additional field | |
| 31 | which is the counter for the number of waiters |