diff options
| author | davidxu <davidxu@FreeBSD.org> | 2010-09-01 03:11:21 +0000 |
|---|---|---|
| committer | davidxu <davidxu@FreeBSD.org> | 2010-09-01 03:11:21 +0000 |
| commit | 5f00b957aee7c4cc6138734e4b4dc582cf4d10f9 (patch) | |
| tree | 121f43c8c92789442e82ae22a69ea70be4586b0a /lib/libthr/thread/thr_umtx.h | |
| parent | 4dcb50723aa0d3f4264ee1d9ca3baf70b4adc2de (diff) | |
| download | FreeBSD-src-5f00b957aee7c4cc6138734e4b4dc582cf4d10f9.zip FreeBSD-src-5f00b957aee7c4cc6138734e4b4dc582cf4d10f9.tar.gz | |
Change atfork lock from mutex to rwlock, also make mutexes used by malloc()
module private type, when private type mutex is locked/unlocked, thread
critical region is entered or leaved. These changes makes fork()
async-signal safe which required by POSIX. Note that user's atfork handler
still needs to be async-signal safe, but it is not problem of libthr, it
is user's responsiblity.
Diffstat (limited to 'lib/libthr/thread/thr_umtx.h')
| -rw-r--r-- | lib/libthr/thread/thr_umtx.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/libthr/thread/thr_umtx.h b/lib/libthr/thread/thr_umtx.h index 2048984..3f53faf 100644 --- a/lib/libthr/thread/thr_umtx.h +++ b/lib/libthr/thread/thr_umtx.h @@ -32,7 +32,8 @@ #include <strings.h> #include <sys/umtx.h> -#define DEFAULT_UMUTEX {0,0, {0,0},{0,0,0,0}} +#define DEFAULT_UMUTEX {0,0,{0,0},{0,0,0,0}} +#define DEFAULT_URWLOCK {0,0,0,0,{0,0,0,0}} int __thr_umutex_lock(struct umutex *mtx, uint32_t id) __hidden; int __thr_umutex_timedlock(struct umutex *mtx, uint32_t id, @@ -43,6 +44,8 @@ int __thr_umutex_set_ceiling(struct umutex *mtx, uint32_t ceiling, uint32_t *oldceiling) __hidden; void _thr_umutex_init(struct umutex *mtx) __hidden; +void _thr_urwlock_init(struct urwlock *rwl) __hidden; + int _thr_umtx_wait(volatile long *mtx, long exp, const struct timespec *timeout) __hidden; int _thr_umtx_wait_uint(volatile u_int *mtx, u_int exp, |
