Sean Keely
c9642cf7af
Added an API for creating signals with attributes. Added two APIs for IPC operations on signals. Initial use of exceptions for error handling. Add ref counting to signals. Removed spin loops from signal destructors. Signals are no longer to be destroyed with delete, use DeleteSignal instead. Added delete safety to doorbells. Added secondary hsa_signal_t -> Signal* translation path for IPC enabled signals. Change-Id: Id59065d002f0c2566b0a9425694da2ed27cb7d7f
113 lines
3.9 KiB
C++
113 lines
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) 2014-2015, 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 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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#endif // HSA_RUNTME_CORE_INC_IPC_SIGNAL_H_
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