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authorNicolas S. Dade <nic.dade@gmail.com>2015-12-18 19:39:19 -0800
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2015-12-22 14:32:50 +0100
commite3c3bf2b5801d0cc544e732fcee1ba51121051b3 (patch)
treeba569e54011048dc82264ffa1953a6293c90bd9d /utils/Makefile.in
parentf5bdd8ff82607e55a1c511e13e37a984408c8094 (diff)
pselect: Use linux pselect syscall when available
Linux has a pselect syscall since 2.6.something. Using it rather than emulating it with sigprocmask+select+sigprocmask is smaller code, and works properly. (The emulation has race conditions when unblocked signals arrive before or after the select) The tv.nsec >= 1E9 handling comes from uclibc's linux select() implementation, which itself uses pselect() internally if the pselect syscall exists. I though it would be good to do the same here. Note that although the libc pselect() API has 6 arguments, the linux kernel syscall as 7 arguments. There is an extra, somewhat vestigial, sizeof the signal mask argument. Signed-off-by: Nicolas S. Dade <nic.dade@gmail.com>
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