/* This function is used to obtain the current LRU clock.
* If the current resolution is lower than the frequency we refresh the
* LRU clock (as it should be in production servers) we return the
* precomputed value, otherwise we need to resort to a system call. */
unsigned int LRU_CLOCK(void) {
unsigned int lruclock;
if (1000/server.hz <= LRU_CLOCK_RESOLUTION) {
atomicGet(server.lruclock,lruclock);
} else {
lruclock = getLRUClock();
}
return lruclock;
}
size_t zmalloc_used_memory(void) {
size_t um;
if (zmalloc_thread_safe) {
atomicGet(used_memory,um,&used_memory_mutex);
} else {
um = used_memory;
}
return um;
}
size_t zmalloc_used_memory(void) {
size_t um;
atomicGet(used_memory,um);
return um;
}