Brandon Potter
63 baris
2.2 KiB
C++
63 baris
2.2 KiB
C++
/******************************************************************************
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* Copyright (c) 2024 Advanced Micro Devices, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* 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 shall be included in
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* all copies or substantial portions of the 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 THE
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* 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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#include "../sync/abql_block_mutex.hpp"
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#include "../util.hpp"
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namespace rocshmem {
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__device__ ABQLBlockMutex::TicketT ABQLBlockMutex::lock() {
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TicketT my_ticket{grab_ticket_()};
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wait_turn_(my_ticket);
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return my_ticket;
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}
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__device__ void ABQLBlockMutex::unlock(TicketT my_ticket) {
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TicketT next_ticket{my_ticket + 1};
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signal_next_(next_ticket);
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}
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__device__ ABQLBlockMutex::TicketT ABQLBlockMutex::grab_ticket_() {
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TicketT ticket{atomicAdd(&ticket_, 1)};
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return ticket;
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}
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__device__ bool ABQLBlockMutex::is_turn_(TicketT ticket) {
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size_t index{ticket % memory_channels_};
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return turns_[index].vol_ == ticket;
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}
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__device__ void ABQLBlockMutex::wait_turn_(TicketT ticket) {
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size_t index{ticket % memory_channels_};
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while (turns_[index].vol_ != ticket) {
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}
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}
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__device__ void ABQLBlockMutex::signal_next_(TicketT ticket) {
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size_t index{ticket % memory_channels_};
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turns_[index].vol_ = ticket;
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__threadfence();
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}
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} // namespace rocshmem
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