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authorRich Felker <dalias@aerifal.cx>2011-04-06 20:27:07 -0400
committerRich Felker <dalias@aerifal.cx>2011-04-06 20:27:07 -0400
commitb2486a8922bf4977bd82c8190258e39de28c053b (patch)
tree7e6a928a7fb8f84ab835ea9009ddb447487b44e4 /src/unistd/link.c
parent74950b336d27532718428c7f5f98409c74f30819 (diff)
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move rsyscall out of pthread_create module
this is something of a tradeoff, as now set*id() functions, rather
than pthread_create, are what pull in the code overhead for dealing
with linux's refusal to implement proper POSIX thread-vs-process
semantics. my motivations are:

1. it's cleaner this way, especially cleaner to optimize out the
rsyscall locking overhead from pthread_create when it's not needed.
2. it's expected that only a tiny number of core system programs will
ever use set*id() functions, whereas many programs may want to use
threads, and making thread overhead tiny is an incentive for "light"
programs to try threads.
Diffstat (limited to 'src/unistd/link.c')
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