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* process-shared barrier support, based on discussion with bdonlanRich Felker2011-09-271-2/+11
| | | | | | | | | | | | | this implementation is rather heavy-weight, but it's the first solution i've found that's actually correct. all waiters actually wait twice at the barrier so that they can synchronize exit, and they hold a "vm lock" that prevents changes to virtual memory mappings (and blocks pthread_barrier_destroy) until all waiters are finished inspecting the barrier. thus, it is safe for any thread to destroy and/or unmap the barrier's memory as soon as pthread_barrier_wait returns, without further synchronization.
* consistency: change all remaining syscalls to use SYS_ rather than __NR_ prefixRich Felker2011-04-061-1/+1
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* global cleanup to use the new syscall interfaceRich Felker2011-03-201-2/+2
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* cleaning up syscalls in preparation for x86_64 portRich Felker2011-02-131-0/+4
| | | | | | | | | - hide all the legacy xxxxxx32 name cruft in syscall.h so the actual source files can be clean and uniform across all archs. - cleanup llseek/lseek and mmap2/mmap handling for 32/64 bit systems - alternate implementation for nice if the target lacks nice syscall
* initial check-in, version 0.5.0 v0.5.0Rich Felker2011-02-121-0/+18