#ifndef LIBDRM_ATOMICS_H #define LIBDRM_ATOMICS_H typedef struct { int atomic; } atomic_t; # define atomic_read(x) ((x)->atomic) # define atomic_set(x, val) ((x)->atomic = (val)) # define atomic_inc(x) ((void) __sync_fetch_and_add (&(x)->atomic, 1)) # define atomic_inc_return(x) (__sync_add_and_fetch (&(x)->atomic, 1)) # define atomic_dec_and_test(x) (__sync_add_and_fetch (&(x)->atomic, -1) == 0) # define atomic_add(x, v) ((void) __sync_add_and_fetch(&(x)->atomic, (v))) # define atomic_dec(x, v) ((void) __sync_sub_and_fetch(&(x)->atomic, (v))) # define atomic_cmpxchg(x, oldv, newv) __sync_val_compare_and_swap (&(x)->atomic, oldv, newv) #endif