| // Copyright 2019 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SRC_GRAPHICS_LIB_COMPUTE_SPINEL_HANDLE_H_ |
| #define SRC_GRAPHICS_LIB_COMPUTE_SPINEL_HANDLE_H_ |
| |
| // |
| // |
| // |
| |
| #include "spinel_types.h" |
| |
| // |
| // Add defensive high guard-bit flags to the opaque path and raster |
| // handles. This is tested once and stripped down to a handle. |
| // |
| // union spn_typed_handle |
| // { |
| // spn_uint u32; |
| // |
| // struct { |
| // spn_uint handle : 30; |
| // spn_uint is_path : 1; |
| // spn_uint is_raster : 1; |
| // }; |
| // struct { |
| // spn_uint na : 30; |
| // spn_uint type : 2; |
| // }; |
| // } |
| // |
| |
| typedef uint32_t spn_typed_handle_t; |
| typedef uint32_t spn_handle_t; |
| |
| // |
| // clang-format off |
| // |
| |
| typedef enum spn_typed_handle_type_e |
| { |
| SPN_TYPED_HANDLE_TYPE_PATH = 0x40000000, |
| SPN_TYPED_HANDLE_TYPE_RASTER = (int32_t)(0x80000000) |
| |
| } spn_typed_handle_type_e; |
| |
| // |
| // |
| // |
| |
| #define SPN_TYPED_HANDLE_TYPE_MASK (SPN_TYPED_HANDLE_TYPE_PATH | SPN_TYPED_HANDLE_TYPE_RASTER) |
| |
| #define SPN_TYPED_HANDLE_TO_HANDLE(h) ((h) & ~SPN_TYPED_HANDLE_TYPE_MASK) |
| |
| #define SPN_TYPED_HANDLE_IS_TYPE(h,t) (((h) & (t)) != 0) |
| #define SPN_TYPED_HANDLE_IS_PATH(h) SPN_TYPE_HANDLE_IS_TYPE(SPN_TYPED_HANDLE_TYPE_PATH) |
| #define SPN_TYPED_HANDLE_IS_RASTER(h) SPN_TYPE_HANDLE_IS_TYPE(SPN_TYPED_HANDLE_TYPE_RASTER) |
| |
| // |
| // clang-format on |
| // |
| |
| #endif // SRC_GRAPHICS_LIB_COMPUTE_SPINEL_HANDLE_H_ |
