| /* |
| * Copyright (c) 2014 Advanced Micro Devices, Inc. |
| * |
| * 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 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. |
| */ |
| // |
| // Copyright (c) 2014 Advanced Micro Devices, Inc. All rights reserved. |
| // |
| |
| #ifndef _PIPES_H |
| #define _PIPES_H 1 |
| |
| #pragma OPENCL EXTENSION cl_khr_int64_base_atomics : enable |
| #pragma OPENCL EXTENSION cl_khr_int64_extended_atomics : enable |
| |
| #define DO_PIPE_INTERNAL_SIZE(F) \ |
| F(1,uchar) \ |
| F(2,ushort) \ |
| F(4,uint) \ |
| F(8,ulong) \ |
| F(16,ulong2) \ |
| F(32,ulong4) \ |
| F(64,ulong8) \ |
| F(128,ulong16) |
| |
| struct pipeimp { |
| atomic_size_t read_idx; |
| atomic_size_t write_idx; |
| size_t end_idx; |
| uchar pad[128 - 3*sizeof(size_t)]; |
| uchar packets[1]; |
| }; |
| |
| extern void __memcpy_internal_aligned(void *, const void *, size_t, size_t); |
| |
| static inline size_t |
| reserve(volatile __global atomic_size_t *pidx, size_t lim, size_t n) |
| { |
| size_t idx = atomic_load_explicit(pidx, memory_order_acquire, memory_scope_device); |
| |
| for (;;) { |
| if (idx + n > lim) |
| return ~(size_t)0; |
| |
| if (atomic_compare_exchange_strong_explicit(pidx, &idx, idx + n, memory_order_acq_rel, memory_order_acquire, memory_scope_device)) |
| break; |
| } |
| |
| return idx; |
| } |
| |
| #endif // _PIPES_H |
| |