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[PathV2] Add mapped_file_region. Implementation for Windows and POSIX.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161976 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael J. Spencer
2012-08-15 19:05:47 +00:00
parent b9d565ac99
commit 1ebd25e438
4 changed files with 421 additions and 26 deletions
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59
unittests/Support/Path.cpp
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@ -340,44 +340,51 @@ TEST_F(FileSystemTest, Permissions) {
}
#endif
#if !defined(_WIN32) // FIXME: temporary suppressed.
TEST_F(FileSystemTest, FileMapping) {
// Create a temp file.
int FileDescriptor;
SmallString<64> TempPath;
ASSERT_NO_ERROR(
fs::unique_file("%%-%%-%%-%%.temp", FileDescriptor, TempPath));
// Grow temp file to be 4096 bytes
ASSERT_NO_ERROR(sys::fs::resize_file(Twine(TempPath), 4096));
// Map in temp file and add some content
void* MappedMemory;
ASSERT_NO_ERROR(fs::map_file_pages(Twine(TempPath), 0, 4096,
true /*writable*/, MappedMemory));
char* Memory = reinterpret_cast<char*>(MappedMemory);
strcpy(Memory, "hello there");
// Unmap temp file
ASSERT_NO_ERROR(fs::unmap_file_pages(MappedMemory, 4096));
MappedMemory = NULL;
Memory = NULL;
error_code EC;
StringRef Val("hello there");
{
fs::mapped_file_region mfr(FileDescriptor,
fs::mapped_file_region::readwrite,
4096,
0,
EC);
ASSERT_NO_ERROR(EC);
std::copy(Val.begin(), Val.end(), mfr.data());
// Explicitly add a 0.
mfr.data()[Val.size()] = 0;
// Unmap temp file
}
// Map it back in read-only
ASSERT_NO_ERROR(fs::map_file_pages(Twine(TempPath), 0, 4096,
false /*read-only*/, MappedMemory));
fs::mapped_file_region mfr(Twine(TempPath),
fs::mapped_file_region::readonly,
0,
0,
EC);
ASSERT_NO_ERROR(EC);
// Verify content
Memory = reinterpret_cast<char*>(MappedMemory);
bool SAME = (strcmp(Memory, "hello there") == 0);
EXPECT_TRUE(SAME);
EXPECT_EQ(StringRef(mfr.const_data()), Val);
// Unmap temp file
ASSERT_NO_ERROR(fs::unmap_file_pages(MappedMemory, 4096));
MappedMemory = NULL;
Memory = NULL;
}
#ifdef LLVM_USE_RVALUE_REFERENCES
fs::mapped_file_region m(Twine(TempPath),
fs::mapped_file_region::readonly,
0,
0,
EC);
ASSERT_NO_ERROR(EC);
const char *Data = m.const_data();
fs::mapped_file_region mfrrv(llvm_move(m));
EXPECT_EQ(mfrrv.const_data(), Data);
#endif
}
} // anonymous namespace