2 * Copyright © 2009 Intel Corporation
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24 * Chris Wilson <chris@chris-wilson.co.uk>
29 * @file intel_atomics.h
31 * Private definitions for atomic operations
34 #ifndef INTEL_ATOMICS_H
35 #define INTEL_ATOMICS_H
41 #if HAVE_INTEL_ATOMIC_PRIMITIVES
43 #define HAS_ATOMIC_OPS 1
49 # define atomic_read(x) ((x)->atomic)
50 # define atomic_set(x, val) ((x)->atomic = (val))
51 # define atomic_inc(x) ((void) __sync_fetch_and_add (&(x)->atomic, 1))
52 # define atomic_dec_and_test(x) (__sync_fetch_and_add (&(x)->atomic, -1) == 1)
53 # define atomic_cmpxchg(x, oldv, newv) __sync_val_compare_and_swap (&(x)->atomic, oldv, newv)
57 #if HAVE_LIB_ATOMIC_OPS
58 #include <atomic_ops.h>
60 #define HAS_ATOMIC_OPS 1
66 # define atomic_read(x) AO_load_full(&(x)->atomic)
67 # define atomic_set(x, val) AO_store_full(&(x)->atomic, (val))
68 # define atomic_inc(x) ((void) AO_fetch_and_add1_full(&(x)->atomic))
69 # define atomic_dec_and_test(x) (AO_fetch_and_sub1_full(&(x)->atomic) == 1)
70 # define atomic_cmpxchg(x, oldv, newv) AO_compare_and_swap_full(&(x)->atomic, oldv, newv)
75 #error libdrm-intel requires atomic operations, please define them for your CPU/compiler.