diff options
Diffstat (limited to 'libdrm/intel/intel_atomic.h')
-rw-r--r-- | libdrm/intel/intel_atomic.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/libdrm/intel/intel_atomic.h b/libdrm/intel/intel_atomic.h new file mode 100644 index 00000000..562394a7 --- /dev/null +++ b/libdrm/intel/intel_atomic.h @@ -0,0 +1,59 @@ +/* + * Copyright © 2009 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + * + * Authors: + * Chris Wilson <chris@chris-wilson.co.uk> + * + */ + +/** + * @file intel_atomics.h + * + * Private definitions for atomic operations + */ + +#ifndef INTEL_ATOMICS_H +#define INTEL_ATOMICS_H + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#if HAVE_INTEL_ATOMIC_PRIMITIVES + +#define HAS_ATOMIC_OPS 1 + +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_dec_and_test(x) (__sync_fetch_and_add (&(x)->atomic, -1) == 1) +# define atomic_cmpxchg(x, oldv, newv) __sync_val_compare_and_swap (&(x)->atomic, oldv, newv) + +#endif + +#if ! HAS_ATOMIC_OPS +#error libdrm-intel requires atomic operations, please define them for your CPU/compiler. +#endif + +#endif |