Ramesh Errabolu
115 lignes
3.9 KiB
C++
115 lignes
3.9 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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//
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// The University of Illinois/NCSA
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// Open Source License (NCSA)
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//
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// Copyright (c) 2014-2020, Advanced Micro Devices, Inc. All rights reserved.
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//
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// Developed by:
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//
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// AMD Research and AMD HSA Software Development
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//
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// Advanced Micro Devices, Inc.
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//
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// www.amd.com
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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 with the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// - Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimers.
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// - Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimers in
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// the documentation and/or other materials provided with the distribution.
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// - Neither the names of Advanced Micro Devices, Inc,
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// nor the names of its contributors may be used to endorse or promote
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// products derived from this Software without specific prior written
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// permission.
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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
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// THE CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS WITH THE SOFTWARE.
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//
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////////////////////////////////////////////////////////////////////////////////
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#ifndef HSA_RUNTME_CORE_INC_IPC_SIGNAL_H_
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#define HSA_RUNTME_CORE_INC_IPC_SIGNAL_H_
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#include <atomic>
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#include <utility>
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#include "core/inc/signal.h"
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#include "core/inc/default_signal.h"
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#include "core/util/locks.h"
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namespace rocr {
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namespace core {
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/// @brief Container for ipc shared memory.
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class SharedMemory {
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public:
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SharedMemory(const hsa_amd_ipc_memory_t* handle, size_t len);
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~SharedMemory();
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SharedMemory(SharedMemory&&);
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void* ptr() const { return ptr_; }
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private:
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void* ptr_;
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};
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/// @brief Container for ipc signal abi block.
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class SharedMemorySignal {
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public:
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explicit SharedMemorySignal(const hsa_amd_ipc_memory_t* handle) : signal_(handle, 4096) {
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if (!signal()->IsValid())
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throw AMD::hsa_exception(HSA_STATUS_ERROR_INVALID_ARGUMENT, "IPC Signal handle is invalid.");
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}
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SharedSignal* signal() const { return reinterpret_cast<SharedSignal*>(signal_.ptr()); }
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private:
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SharedMemory signal_;
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};
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/// @brief Memory only signal using a shared memory ABI block.
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class IPCSignal : private SharedMemorySignal, public BusyWaitSignal {
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public:
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/// @brief Creates a sharable handle for an IPC enabled signal.
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static void CreateHandle(Signal* signal, hsa_amd_ipc_signal_t* ipc_handle);
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/// @brief Opens an IPC signal from its IPC handle.
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static Signal* Attach(const hsa_amd_ipc_signal_t* ipc_handle);
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/// @brief Determines if a Signal* can be safely converted to BusyWaitSignal*
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/// via static_cast.
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static __forceinline bool IsType(Signal* ptr) { return ptr->IsType(&rtti_id_); }
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protected:
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bool _IsA(rtti_t id) const {
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if (id == &rtti_id_) return true;
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return BusyWaitSignal::_IsA(id);
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}
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private:
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static int rtti_id_;
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static KernelMutex lock_;
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explicit IPCSignal(SharedMemorySignal&& abi_block)
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: SharedMemorySignal(std::move(abi_block)), BusyWaitSignal(signal(), true) {}
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DISALLOW_COPY_AND_ASSIGN(IPCSignal);
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};
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} // namespace core
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} // namespace rocr
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#endif // HSA_RUNTME_CORE_INC_IPC_SIGNAL_H_
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