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author | Siddhesh Poyarekar <siddhesh@redhat.com> | 2012-11-05 21:12:10 +0530 |
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committer | Siddhesh Poyarekar <siddhesh@redhat.com> | 2012-11-05 21:12:52 +0530 |
commit | 8f861542dd0603bef99e126e509ece89514c1eeb (patch) | |
tree | 083f3bd20edfa09a2341e0340013c0781b4696ad /sysdeps/mach | |
parent | 155ee340b875834693fbd1b7401af7fe88ace04d (diff) | |
download | glibc-8f861542dd0603bef99e126e509ece89514c1eeb.tar.gz glibc-8f861542dd0603bef99e126e509ece89514c1eeb.tar.xz glibc-8f861542dd0603bef99e126e509ece89514c1eeb.zip |
[S390,PPC] Implement FUTEX_WAIT_BITSET for timedwait functions
Since the FUTEX_WAIT operation takes a relative timeout, the pthread_cond_timedwait and other timed function implementations have to get a relative timeout from the absolute timeout parameter it gets before it makes the futex syscall. This value is then converted back into an absolute timeout within the kernel. This is a waste and has hence been improved upon by a FUTEX_WAIT_BITSET operation (OR'd with FUTEX_CLOCK_REALTIME to make the kernel use the realtime clock instead of the default monotonic clock). This was implemented only in the x86 and sh assembly code and not in the C code. This patch implements support for FUTEX_WAIT_BITSET whenever available (since linux-2.6.29) for s390 and powerpc.
Diffstat (limited to 'sysdeps/mach')
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