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path: root/nptl/pthread_mutex_unlock.c
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Diffstat (limited to 'nptl/pthread_mutex_unlock.c')
-rw-r--r--nptl/pthread_mutex_unlock.c21
1 files changed, 17 insertions, 4 deletions
diff --git a/nptl/pthread_mutex_unlock.c b/nptl/pthread_mutex_unlock.c
index c0249f7..6914503 100644
--- a/nptl/pthread_mutex_unlock.c
+++ b/nptl/pthread_mutex_unlock.c
@@ -23,6 +23,10 @@
#include <lowlevellock.h>
#include <stap-probe.h>
+#ifndef lll_unlock_elision
+#define lll_unlock_elision(a,b) ({ lll_unlock (a,b); 0; })
+#endif
+
static int
internal_function
__pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr)
@@ -34,8 +38,9 @@ __pthread_mutex_unlock_usercnt (mutex, decr)
pthread_mutex_t *mutex;
int decr;
{
- int type = PTHREAD_MUTEX_TYPE (mutex);
- if (__builtin_expect (type & ~PTHREAD_MUTEX_KIND_MASK_NP, 0))
+ int type = PTHREAD_MUTEX_TYPE_ELISION (mutex);
+ if (__builtin_expect (type &
+ ~(PTHREAD_MUTEX_KIND_MASK_NP|PTHREAD_MUTEX_ELISION_FLAGS_NP), 0))
return __pthread_mutex_unlock_full (mutex, decr);
if (__builtin_expect (type, PTHREAD_MUTEX_TIMED_NP)
@@ -55,7 +60,14 @@ __pthread_mutex_unlock_usercnt (mutex, decr)
return 0;
}
- else if (__builtin_expect (type == PTHREAD_MUTEX_RECURSIVE_NP, 1))
+ else if (__builtin_expect (type == PTHREAD_MUTEX_TIMED_ELISION_NP, 1))
+ {
+ /* Don't reset the owner/users fields for elision. */
+ return lll_unlock_elision (mutex->__data.__lock,
+ PTHREAD_MUTEX_PSHARED (mutex));
+ }
+ else if (__builtin_expect (PTHREAD_MUTEX_TYPE (mutex)
+ == PTHREAD_MUTEX_RECURSIVE_NP, 1))
{
/* Recursive mutex. */
if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid))
@@ -66,7 +78,8 @@ __pthread_mutex_unlock_usercnt (mutex, decr)
return 0;
goto normal;
}
- else if (__builtin_expect (type == PTHREAD_MUTEX_ADAPTIVE_NP, 1))
+ else if (__builtin_expect (PTHREAD_MUTEX_TYPE (mutex)
+ == PTHREAD_MUTEX_ADAPTIVE_NP, 1))
goto normal;
else
{