72 lines
2.1 KiB
C++
72 lines
2.1 KiB
C++
// Copyright 2019 The Marl Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "osfiber.h"
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#include "marl_test.h"
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namespace {
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// A custom, small stack size for the fibers in these tests.
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// Note: Stack sizes less than 16KB may cause issues on some platforms.
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// See: https://github.com/google/marl/issues/201
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constexpr size_t fiberStackSize = 16 * 1024;
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} // anonymous namespace
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TEST_F(WithoutBoundScheduler, OSFiber) {
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std::string str;
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auto main = marl::OSFiber::createFiberFromCurrentThread(allocator);
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marl::Allocator::unique_ptr<marl::OSFiber> fiberA, fiberB, fiberC;
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fiberC = marl::OSFiber::createFiber(allocator, fiberStackSize, [&] {
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str += "C";
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fiberC->switchTo(fiberB.get());
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});
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fiberB = marl::OSFiber::createFiber(allocator, fiberStackSize, [&] {
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str += "B";
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fiberB->switchTo(fiberA.get());
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});
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fiberA = marl::OSFiber::createFiber(allocator, fiberStackSize, [&] {
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str += "A";
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fiberA->switchTo(main.get());
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});
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main->switchTo(fiberC.get());
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ASSERT_EQ(str, "CBA");
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}
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TEST_F(WithoutBoundScheduler, StackAlignment) {
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uintptr_t address = 0;
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struct alignas(16) AlignTo16Bytes {
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uint64_t a, b;
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};
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auto main = marl::OSFiber::createFiberFromCurrentThread(allocator);
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marl::Allocator::unique_ptr<marl::OSFiber> fiber;
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fiber = marl::OSFiber::createFiber(allocator, fiberStackSize, [&] {
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AlignTo16Bytes stack_var;
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address = reinterpret_cast<uintptr_t>(&stack_var);
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fiber->switchTo(main.get());
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});
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main->switchTo(fiber.get());
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ASSERT_TRUE((address & 15) == 0)
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<< "Stack variable had unaligned address: 0x" << std::hex << address;
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}
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