* config/linux/wait.h (do_spin): New inline, largely copied from do_wait, just don't do futex_wait here, instead return true if it should be done. (do_wait): Implement using do_spin. * config/linux/mutex.h (gomp_mutex_lock_slow): Add an int argument to prototype. (gomp_mutex_lock): Use __sync_val_compare_and_swap instead of __sync_bool_compare_and_swap, pass the oldval to gomp_mutex_lock_slow. * config/linux/mutex.c (gomp_mutex_lock_slow): Add oldval argument. If all mutex contenders are just spinning and not sleeping, don't change state to 2 unnecessarily. Optimize the loop when state has already become 2 to use just one atomic operation per loop instead of two. * config/linux/ia64/mutex.h (gomp_mutex_lock_slow): Add an int argument to prototype. (gomp_mutex_lock): Use __sync_val_compare_and_swap instead of __sync_bool_compare_and_swap, pass the oldval to gomp_mutex_lock_slow. From-SVN: r176326 |
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.. | ||
alpha | ||
arm | ||
ia64 | ||
mips | ||
powerpc | ||
s390 | ||
sparc | ||
x86 | ||
affinity.c | ||
bar.c | ||
bar.h | ||
futex.h | ||
lock.c | ||
mutex.c | ||
mutex.h | ||
omp-lock.h | ||
proc.c | ||
ptrlock.c | ||
ptrlock.h | ||
sem.c | ||
sem.h | ||
wait.h |