On 3/3/21 6:42 PM, André Almeida wrote:
** The wait on multiple problem
The use case lies in the Wine implementation of the Windows NT interface
WaitMultipleObjects. This Windows API function allows a thread to sleep
waiting on the first of a set of event sources (mutexes, timers, signal
On 2/15/21 2:03 PM, Gabriel Krisman Bertazi wrote:
> André Almeida writes:
>
>> Add support to wait on multiple futexes. This is the interface
>> implemented by this syscall:
>>
>> futex_waitv(struct futex_waitv *waiters, unsigned int nr_futexes,
>> unsigned int flags, struct timespec *t
lly consumes things, or
like read() on a vectored set of file descriptors. This doesn't
necessarily mean we have to replicate the manual/auto distinction in the
kernel; we can handle that in user space. This by itself doesn't
actually seem all that unreasonable, but...
* A blocking operat
On 7/31/19 8:22 PM, Zebediah Figura wrote:
On 7/31/19 7:45 PM, Thomas Gleixner wrote:
If I assume a maximum of 65 futexes which got mentioned in one of the
replies then this will allocate 7280 bytes alone for the futex_q array with
a stock debian config which has no debug options enabled which
On 7/31/19 7:45 PM, Thomas Gleixner wrote:
If I assume a maximum of 65 futexes which got mentioned in one of the
replies then this will allocate 7280 bytes alone for the futex_q array with
a stock debian config which has no debug options enabled which would bloat
the struct. Adding the futex_wait
On 7/31/19 5:39 PM, Thomas Gleixner wrote:
On Wed, 31 Jul 2019, Zebediah Figura wrote:
On 7/31/19 7:06 AM, Peter Zijlstra wrote:
On Tue, Jul 30, 2019 at 06:06:02PM -0400, Gabriel Krisman Bertazi wrote:
This is a new futex operation, called FUTEX_WAIT_MULTIPLE, which allows
a thread to wait on
On 7/31/19 7:06 AM, Peter Zijlstra wrote:
On Tue, Jul 30, 2019 at 06:06:02PM -0400, Gabriel Krisman Bertazi wrote:
This is a new futex operation, called FUTEX_WAIT_MULTIPLE, which allows
a thread to wait on several futexes at the same time, and be awoken by
any of them. In a sense, it implement
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