| // Copyright 2017 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_CONNECTIVITY_BLUETOOTH_CORE_BT_HOST_COMMON_SLAB_ALLOCATOR_H_ |
| #define SRC_CONNECTIVITY_BLUETOOTH_CORE_BT_HOST_COMMON_SLAB_ALLOCATOR_H_ |
| |
| #include "src/connectivity/bluetooth/core/bt-host/common/byte_buffer.h" |
| |
| namespace bt { |
| |
| // NOTE: Tweak these as needed. |
| constexpr size_t kSmallBufferSize = 64; |
| constexpr size_t kLargeBufferSize = 2048; |
| |
| constexpr size_t kMaxNumSlabs = 100; |
| constexpr size_t kSlabSize = 32767; |
| |
| // Returns a slab-allocated byte buffer with |size| bytes of capacity. The underlying allocation |
| // occupies |kSmallBufferSize| or |kLargeBufferSize| bytes of memory, unless: |
| // * |size| is 0, which returns a zero-sized byte buffer with no underlying slab allocation. |
| // * |size| exceeds |kLargeBufferSize|, which falls back to the system allocator. |
| // NOTE: In this case, if allocation fails, panic. |
| // |
| // Returns nullptr for failures to allocate. |
| [[nodiscard]] MutableByteBufferPtr NewSlabBuffer(size_t size); |
| |
| } // namespace bt |
| |
| #endif // SRC_CONNECTIVITY_BLUETOOTH_CORE_BT_HOST_COMMON_SLAB_ALLOCATOR_H_ |
