mirror of git://git.musl-libc.org/musl
ea818ea834
conceptually, a_spin needs to be at least a compiler barrier, so the compiler will not optimize out loops (and the load on each iteration) while spinning. it should also be a memory barrier, or the spinning thread might keep spinning without noticing stores from other threads, thus delaying for longer than it should. ideally, an optimal a_spin implementation that avoids unnecessary cache/memory contention should be chosen for each arch, but for now, the easiest thing is to perform a useless a_cas on the calling thread's stack. |
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| .. | ||
| bits | ||
| src | ||
| atomic.h | ||
| crt_arch.h | ||
| pthread_arch.h | ||
| reloc.h | ||
| syscall_arch.h | ||