1 #include "pthread_impl.h"
5 void __vm_lock(int inc)
9 if (inc*v < 0) __wait(vmlock, vmlock+1, v, 1);
10 else if (a_cas(vmlock, v, v+inc)==v) break;
14 void __vm_unlock(void)
16 int inc = vmlock[0]>0 ? -1 : 1;
17 if (a_fetch_add(vmlock, inc)==-inc && vmlock[1])
18 __wake(vmlock, -1, 1);
21 weak_alias(__vm_lock, __vm_lock_impl);
22 weak_alias(__vm_unlock, __vm_unlock_impl);