diff options
| author | kib <kib@FreeBSD.org> | 2016-02-28 17:52:33 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2016-02-28 17:52:33 +0000 |
| commit | e76eb4255b957aa73f6228dd8d525d1946e3707d (patch) | |
| tree | 93354adb0a612a635964c8498072087760a0f93b /lib/libthr/thread/thr_mutexattr.c | |
| parent | 800b1f3198ded0c65c024ea0cef1f44d4bc59fed (diff) | |
| download | FreeBSD-src-e76eb4255b957aa73f6228dd8d525d1946e3707d.zip FreeBSD-src-e76eb4255b957aa73f6228dd8d525d1946e3707d.tar.gz | |
Implement process-shared locks support for libthr.so.3, without
breaking the ABI. Special value is stored in the lock pointer to
indicate shared lock, and offline page in the shared memory is
allocated to store the actual lock.
Reviewed by: vangyzen (previous version)
Discussed with: deischen, emaste, jhb, rwatson,
Martin Simmons <martin@lispworks.com>
Tested by: pho
Sponsored by: The FreeBSD Foundation
Diffstat (limited to 'lib/libthr/thread/thr_mutexattr.c')
| -rw-r--r-- | lib/libthr/thread/thr_mutexattr.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/lib/libthr/thread/thr_mutexattr.c b/lib/libthr/thread/thr_mutexattr.c index 7c48ed22..fa349cf 100644 --- a/lib/libthr/thread/thr_mutexattr.c +++ b/lib/libthr/thread/thr_mutexattr.c @@ -176,8 +176,7 @@ _pthread_mutexattr_getpshared(const pthread_mutexattr_t *attr, if (attr == NULL || *attr == NULL) return (EINVAL); - - *pshared = PTHREAD_PROCESS_PRIVATE; + *pshared = (*attr)->m_pshared; return (0); } @@ -185,13 +184,11 @@ int _pthread_mutexattr_setpshared(pthread_mutexattr_t *attr, int pshared) { - if (attr == NULL || *attr == NULL) + if (attr == NULL || *attr == NULL || + (pshared != PTHREAD_PROCESS_PRIVATE && + pshared != PTHREAD_PROCESS_SHARED)) return (EINVAL); - - /* Only PTHREAD_PROCESS_PRIVATE is supported. */ - if (pshared != PTHREAD_PROCESS_PRIVATE) - return (EINVAL); - + (*attr)->m_pshared = pshared; return (0); } |
