diff options
Diffstat (limited to 'sysdeps/nptl')
| -rw-r--r-- | sysdeps/nptl/futex-internal.h | 9 | ||||
| -rw-r--r-- | sysdeps/nptl/lowlevellock-futex.h | 13 |
2 files changed, 17 insertions, 5 deletions
diff --git a/sysdeps/nptl/futex-internal.h b/sysdeps/nptl/futex-internal.h index 86a0818072..f29d6d48b2 100644 --- a/sysdeps/nptl/futex-internal.h +++ b/sysdeps/nptl/futex-internal.h @@ -49,7 +49,7 @@ futex word. Both absolute and relative timeouts can be used. An absolute timeout - expires when the given specific point in time on the CLOCK_REALTIME clock + expires when the given specific point in time on the specified clock passes, or when it already has passed. A relative timeout expires when the given duration of time on the CLOCK_MONOTONIC clock passes. Relative timeouts may be imprecise (see futex_supports_exact_relative_timeouts). @@ -159,16 +159,23 @@ futex_reltimed_wait_cancelable (unsigned int* futex_word, unsigned int expected, const struct timespec* reltime, int private); +/* Check whether the specified clockid is supported by + futex_abstimed_wait and futex_abstimed_wait_cancelable. */ +static __always_inline int +futex_abstimed_supported_clockid (clockid_t clockid); + /* Like futex_reltimed_wait, but the provided timeout (ABSTIME) is an absolute point in time; a call will time out after this point in time. */ static __always_inline int futex_abstimed_wait (unsigned int* futex_word, unsigned int expected, + clockid_t clockid, const struct timespec* abstime, int private); /* Like futex_reltimed_wait but is a POSIX cancellation point. */ static __always_inline int futex_abstimed_wait_cancelable (unsigned int* futex_word, unsigned int expected, + clockid_t clockid, const struct timespec* abstime, int private); /* Atomically wrt other futex operations on the same futex, this unblocks the diff --git a/sysdeps/nptl/lowlevellock-futex.h b/sysdeps/nptl/lowlevellock-futex.h index 63d917d8da..53fd53d1d4 100644 --- a/sysdeps/nptl/lowlevellock-futex.h +++ b/sysdeps/nptl/lowlevellock-futex.h @@ -43,10 +43,15 @@ #define lll_futex_timed_wait(futexp, val, timeout, private) \ -ENOSYS -/* If CLOCKBIT is zero, this is identical to lll_futex_timed_wait. - If CLOCKBIT has FUTEX_CLOCK_REALTIME set, then it's the same but - TIMEOUT is counted by CLOCK_REALTIME rather than CLOCK_MONOTONIC. */ -#define lll_futex_timed_wait_bitset(futexp, val, timeout, clockbit, private) \ +/* Verify whether the supplied clockid is supported by + lll_futex_clock_wait_bitset. */ +#define lll_futex_supported_clockid(clockid) \ + (0) + +/* Wait until a lll_futex_wake call on FUTEXP, or the absolute TIMEOUT + measured against CLOCKID elapses. CLOCKID may be CLOCK_REALTIME or + CLOCK_MONOTONIC. */ +#define lll_futex_clock_wait_bitset(futexp, val, clockid, timeout, private) \ -ENOSYS /* Wake up up to NR waiters on FUTEXP. */ |