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/*
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 * Copyright © 2009 Intel Corporation
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a
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 * copy of this software and associated documentation files (the "Software"),
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 * to deal in the Software without restriction, including without limitation
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 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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 * and/or sell copies of the Software, and to permit persons to whom the
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 * Software is furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice (including the next
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 * paragraph) shall be included in all copies or substantial portions of the
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 * Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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 * IN THE SOFTWARE.
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 *
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 * Authors:
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 *    Chris Wilson
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 *
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 */
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/**
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 * @file xf86atomics.h
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 *
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 * Private definitions for atomic operations
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 */
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#ifndef LIBDRM_ATOMICS_H
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#define LIBDRM_ATOMICS_H
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#define HAS_ATOMIC_OPS 1
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typedef struct {
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	int atomic;
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} atomic_t;
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# define atomic_read(x) ((x)->atomic)
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# define atomic_set(x, val) ((x)->atomic = (val))
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# define atomic_inc(x) ((void) __sync_fetch_and_add (&(x)->atomic, 1))
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# define atomic_dec_and_test(x) (__sync_fetch_and_add (&(x)->atomic, -1) == 1)
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# define atomic_add(x, v) ((void) __sync_add_and_fetch(&(x)->atomic, (v)))
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# define atomic_dec(x, v) ((void) __sync_sub_and_fetch(&(x)->atomic, (v)))
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# define atomic_cmpxchg(x, oldv, newv) __sync_val_compare_and_swap (&(x)->atomic, oldv, newv)
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#if HAVE_LIB_ATOMIC_OPS
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#include
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#define HAS_ATOMIC_OPS 1
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typedef struct {
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	AO_t atomic;
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} atomic_t;
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# define atomic_read(x) AO_load_full(&(x)->atomic)
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# define atomic_set(x, val) AO_store_full(&(x)->atomic, (val))
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# define atomic_inc(x) ((void) AO_fetch_and_add1_full(&(x)->atomic))
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# define atomic_add(x, v) ((void) AO_fetch_and_add_full(&(x)->atomic, (v)))
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# define atomic_dec(x, v) ((void) AO_fetch_and_add_full(&(x)->atomic, -(v)))
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# define atomic_dec_and_test(x) (AO_fetch_and_sub1_full(&(x)->atomic) == 1)
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# define atomic_cmpxchg(x, oldv, newv) AO_compare_and_swap_full(&(x)->atomic, oldv, newv)
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#endif
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#if defined(__sun) && !defined(HAS_ATOMIC_OPS)  /* Solaris & OpenSolaris */
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#include
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#define HAS_ATOMIC_OPS 1
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typedef struct { uint_t atomic; } atomic_t;
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# define atomic_read(x) (int) ((x)->atomic)
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# define atomic_set(x, val) ((x)->atomic = (uint_t)(val))
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# define atomic_inc(x) (atomic_inc_uint (&(x)->atomic))
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# define atomic_dec_and_test(x) (atomic_dec_uint_nv(&(x)->atomic) == 1)
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# define atomic_add(x, v) (atomic_add_int(&(x)->atomic, (v)))
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# define atomic_dec(x, v) (atomic_add_int(&(x)->atomic, -(v)))
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# define atomic_cmpxchg(x, oldv, newv) atomic_cas_uint (&(x)->atomic, oldv, newv)
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#endif
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#if ! HAS_ATOMIC_OPS
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#error libdrm requires atomic operations, please define them for your CPU/compiler.
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#endif
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#endif