适用于64位的Linux futex [英] Linux futex for 64-bits

问题描述

我在64位Linux机器上:

I am on a 64-bit Linux box:

Linux illin793 2.6.32-279.5.2.el6.x86_64#1 SMP周二8月14日11:36:39 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux

Linux illin793 2.6.32-279.5.2.el6.x86_64 #1 SMP Tue Aug 14 11:36:39 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux

来自man futex:

From man futex:

int futex(int * uaddr，int op，int val，const struct timespec * timeout， int * uaddr2，int val3);

int futex(int *uaddr, int op, int val, const struct timespec *timeout, int *uaddr2, int val3);

因此，这里futex使用32位值.

So, here futex works with 32-bits value.

Linux上是否存在可以使用64位值的futex?

Is there futex on Linux that works with 64-bits value?

推荐答案

Linux上目前不支持64位futex.早在2007年就已经有补丁可以增加支持，但是我不知道为什么还没有集成它们.

There is currently no support for 64-bit futexes on Linux. There have been patches to add support circulating from as far back as 2007, but I have no idea why they haven't been integrated.

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