diff options
Diffstat (limited to 'sysdeps/nptl/lowlevellock.h')
| -rw-r--r-- | sysdeps/nptl/lowlevellock.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/sysdeps/nptl/lowlevellock.h b/sysdeps/nptl/lowlevellock.h index e3f006537a..92298f3b7e 100644 --- a/sysdeps/nptl/lowlevellock.h +++ b/sysdeps/nptl/lowlevellock.h @@ -21,6 +21,7 @@ #include <atomic.h> #include <lowlevellock-futex.h> +#include <time.h> /* Low-level locks use a combination of atomic operations (to acquire and release lock ownership) and futex operations (to block until the state @@ -121,10 +122,12 @@ extern void __lll_lock_wait (int *futex, int private) attribute_hidden; #define lll_cond_lock(futex, private) __lll_cond_lock (&(futex), private) -extern int __lll_clocklock_wait (int *futex, clockid_t, +extern int __lll_clocklock_wait (int *futex, int val, clockid_t, const struct timespec *, int private) attribute_hidden; +#define lll_timedwait(futex, val, clockid, abstime, private) \ + __lll_clocklock_wait (futex, val, clockid, abstime, private) /* As __lll_lock, but with an absolute timeout measured against the clock specified in CLOCKID. If the timeout occurs then return ETIMEDOUT. If @@ -136,7 +139,15 @@ extern int __lll_clocklock_wait (int *futex, clockid_t, \ if (__glibc_unlikely \ (atomic_compare_and_exchange_bool_acq (__futex, 1, 0))) \ - __val = __lll_clocklock_wait (__futex, clockid, abstime, private); \ + { \ + while (atomic_exchange_acq (futex, 2) != 0) \ + { \ + __val = __lll_clocklock_wait (__futex, 2, clockid, \ + abstime, private); \ + if (__val == EINVAL || __val == ETIMEDOUT) \ + break; \ + } \ + } \ __val; \ }) #define lll_clocklock(futex, clockid, abstime, private) \ |