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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/util/mmap_file_allocator.h>
#include <vespa/vespalib/gtest/gtest.h>
#include <sys/mman.h>
using vespalib::alloc::MemoryAllocator;
using vespalib::alloc::MmapFileAllocator;
namespace {
vespalib::string basedir("mmap-file-allocator-dir");
vespalib::string hello("hello");
struct MyAlloc
{
const MemoryAllocator& allocator;
void* data;
size_t size;
MyAlloc(MemoryAllocator& allocator_in, MemoryAllocator::PtrAndSize buf)
: allocator(allocator_in),
data(buf.first),
size(buf.second)
{
}
~MyAlloc()
{
allocator.free(data, size);
}
MemoryAllocator::PtrAndSize asPair() const noexcept { return std::make_pair(data, size); }
};
}
class MmapFileAllocatorTest : public ::testing::Test
{
protected:
MmapFileAllocator _allocator;
public:
MmapFileAllocatorTest();
~MmapFileAllocatorTest();
};
MmapFileAllocatorTest::MmapFileAllocatorTest()
: _allocator(basedir)
{
}
MmapFileAllocatorTest::~MmapFileAllocatorTest() = default;
TEST_F(MmapFileAllocatorTest, zero_sized_allocation_is_handled)
{
MyAlloc buf(_allocator, _allocator.alloc(0));
EXPECT_EQ(nullptr, buf.data);
EXPECT_EQ(0u, buf.size);
}
TEST_F(MmapFileAllocatorTest, mmap_file_allocator_works)
{
MyAlloc buf(_allocator, _allocator.alloc(4));
EXPECT_LE(4u, buf.size);
EXPECT_TRUE(buf.data != nullptr);
memcpy(buf.data, "1st", 4);
MyAlloc buf2(_allocator, _allocator.alloc(5));
EXPECT_LE(5u, buf2.size);
EXPECT_TRUE(buf2.data != nullptr);
EXPECT_TRUE(buf.data != buf2.data);
memcpy(buf2.data, "fine", 5);
EXPECT_EQ(0u, _allocator.resize_inplace(buf.asPair(), 5));
EXPECT_EQ(0u, _allocator.resize_inplace(buf.asPair(), 3));
EXPECT_NE(0u, _allocator.get_end_offset());
int result = msync(buf.data, buf.size, MS_SYNC);
EXPECT_EQ(0, result);
result = msync(buf2.data, buf2.size, MS_SYNC);
EXPECT_EQ(0, result);
}
TEST_F(MmapFileAllocatorTest, reuse_file_offset_works)
{
{
MyAlloc buf(_allocator, _allocator.alloc(hello.size() + 1));
memcpy(buf.data, hello.c_str(), hello.size() + 1);
}
{
MyAlloc buf(_allocator, _allocator.alloc(hello.size() + 1));
EXPECT_EQ(0, memcmp(buf.data, hello.c_str(), hello.size() + 1));
}
}
GTEST_MAIN_RUN_ALL_TESTS()
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