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| author | Justus Winter <4winter@informatik.uni-hamburg.de> | 2013-11-23 16:12:55 +0100 |
|---|---|---|
| committer | Justus Winter <4winter@informatik.uni-hamburg.de> | 2015-04-07 14:23:36 +0200 |
| commit | 4241dd5673566a61add85bd9eb52d4ae7db2750a (patch) | |
| tree | 0c7ce8514067068a877d8181544c2870af1dac7d /libports/transfer-right.c | |
| parent | 785f4aea18b5705e63609001d2aa12871a774804 (diff) | |
| download | hurd-4241dd5673566a61add85bd9eb52d4ae7db2750a.tar.gz hurd-4241dd5673566a61add85bd9eb52d4ae7db2750a.tar.bz2 hurd-4241dd5673566a61add85bd9eb52d4ae7db2750a.zip | |
libports: use protected payloads to optimize the object lookup
* NEWS: Mention protected payloads.
* libports/Makefile (SRCS): Add `port-deref-deferred.c'.
* libports/create-internal.c (_ports_create_port_internal): Set the
protected payload to the objects address.
* libports/import-port.c (ports_import_port): Likewise.
* libports/reallocate-from-external.c (ports_reallocate_from_external):
Likewise.
* libports/reallocate-port.c (ports_reallocate_port): Likewise.
* libports/transfer-right.c (ports_transfer_right): Likewise.
* libports/manage-multithread.c (ports_manage_port_operations_multithread):
Use the protected payload for the object lookup if provided. Add
thread pool management calls.
* libports/manage-one-thread.c (ports_manage_port_operations_one_thread):
Likewise.
* libports/destroy-right.c (ports_destroy_right): Defer the
dereferencing of outstanding send rights to avoid a port_info
use-after-free.
* libports/port-deref-deferred.c: New file.
* libports/port-deref-deferred.h: Likewise.
* libports/ports.h (struct port_bucket): New field `threadpool'.
(ports_lookup_payload): Check `port_right'.
Diffstat (limited to 'libports/transfer-right.c')
| -rw-r--r-- | libports/transfer-right.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libports/transfer-right.c b/libports/transfer-right.c index 776a8d2b..64de7f79 100644 --- a/libports/transfer-right.c +++ b/libports/transfer-right.c @@ -91,6 +91,9 @@ ports_transfer_right (void *tostruct, err = hurd_ihash_add (&topi->bucket->htable, port, topi); pthread_rwlock_unlock (&_ports_htable_lock); assert_perror (err); + /* This is an optimization. It may fail. */ + mach_port_set_protected_payload (mach_task_self (), port, + (unsigned long) topi); if (topi->bucket != frompi->bucket) { err = mach_port_move_member (mach_task_self (), port, |