70 lines
2.6 KiB
C++
70 lines
2.6 KiB
C++
//===-- Unittests for shared RPC server -----------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "shared/rpc.h"
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#include "shared/rpc_server.h"
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#include "test/UnitTest/Test.h"
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TEST(LlvmLibcSharedRpcTest, TestIncrement) {
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constexpr uint32_t port_count = 8;
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constexpr uint32_t lane_size = 4;
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alignas(64)
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uint8_t buffer[::rpc::Server::allocation_size(lane_size, port_count)] = {
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0};
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using ProcAType = ::rpc::Process<false>;
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using ProcBType = ::rpc::Process<true>;
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ProcAType ProcA(port_count, buffer);
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ProcBType ProcB(port_count, buffer);
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uint32_t index = 0; // any < port_count
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uint64_t lane_mask = 1;
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// Each process has its own local lock for index
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EXPECT_TRUE(ProcA.try_lock(lane_mask, index));
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EXPECT_TRUE(ProcB.try_lock(lane_mask, index));
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// All zero to begin with
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EXPECT_EQ(ProcA.load_inbox(lane_mask, index), 0u);
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EXPECT_EQ(ProcB.load_inbox(lane_mask, index), 0u);
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EXPECT_EQ(ProcA.load_outbox(lane_mask, index), 0u);
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EXPECT_EQ(ProcB.load_outbox(lane_mask, index), 0u);
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// Available for ProcA and not for ProcB
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EXPECT_FALSE(ProcA.buffer_unavailable(ProcA.load_inbox(lane_mask, index),
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ProcA.load_outbox(lane_mask, index)));
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EXPECT_TRUE(ProcB.buffer_unavailable(ProcB.load_inbox(lane_mask, index),
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ProcB.load_outbox(lane_mask, index)));
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// ProcA write to outbox
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uint32_t ProcAOutbox = ProcA.load_outbox(lane_mask, index);
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EXPECT_EQ(ProcAOutbox, 0u);
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ProcAOutbox = ProcA.invert_outbox(lane_mask, index, ProcAOutbox);
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EXPECT_EQ(ProcAOutbox, 1u);
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// No longer available for ProcA
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EXPECT_TRUE(ProcA.buffer_unavailable(ProcA.load_inbox(lane_mask, index),
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ProcAOutbox));
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// Outbox is still zero, hasn't been written to
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EXPECT_EQ(ProcB.load_outbox(lane_mask, index), 0u);
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// Wait for ownership will terminate because load_inbox returns 1
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EXPECT_EQ(ProcB.load_inbox(lane_mask, index), 1u);
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ProcB.wait_for_ownership(lane_mask, index, 0u, 0u);
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// and B now has the buffer available
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EXPECT_FALSE(ProcB.buffer_unavailable(ProcB.load_inbox(lane_mask, index),
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ProcB.load_outbox(lane_mask, index)));
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// Enough checks for one test, close the locks
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ProcA.unlock(lane_mask, index);
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ProcB.unlock(lane_mask, index);
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}
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