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Replace std::shared_ptr<void> to unique_handle

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This commit is contained in:
Владислав Щапов 2021-10-03 19:18:47 +05:00
parent 7b8cf519f2
commit 1dbe2d9bec
1 changed files with 56 additions and 10 deletions
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66
include/ghc/filesystem.hpp
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@ -2007,6 +2007,52 @@ GHC_INLINE file_status file_status_from_st_mode(T mode)
}
#ifdef GHC_OS_WINDOWS
class unique_handle
{
public:
typedef HANDLE element_type;
unique_handle() noexcept
: handle_(INVALID_HANDLE_VALUE)
{
}
explicit unique_handle(element_type h) noexcept
: handle_(h)
{
}
unique_handle(unique_handle&& u) noexcept
: handle_(u.release())
{
}
~unique_handle() { reset(); }
unique_handle& operator=(unique_handle&& u) noexcept
{
reset(u.release());
return *this;
}
element_type get() const noexcept { return handle_; }
explicit operator bool() const noexcept { return handle_ != INVALID_HANDLE_VALUE; }
element_type release() noexcept
{
element_type tmp = handle_;
handle_ = INVALID_HANDLE_VALUE;
return tmp;
}
void reset(element_type h = INVALID_HANDLE_VALUE) noexcept
{
element_type tmp = handle_;
handle_ = h;
if (tmp != INVALID_HANDLE_VALUE) {
CloseHandle(tmp);
}
}
void swap(unique_handle& u) noexcept { std::swap(handle_, u.handle_); }
private:
element_type handle_;
};
#ifndef REPARSE_DATA_BUFFER_HEADER_SIZE
typedef struct _REPARSE_DATA_BUFFER
{
@ -2051,8 +2097,8 @@ struct free_deleter
GHC_INLINE std::unique_ptr<REPARSE_DATA_BUFFER, free_deleter<REPARSE_DATA_BUFFER>> getReparseData(const path& p, std::error_code& ec)
{
std::shared_ptr<void> file(CreateFileW(GHC_NATIVEWP(p), 0, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 0, OPEN_EXISTING, FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS, 0), CloseHandle);
if (file.get() == INVALID_HANDLE_VALUE) {
unique_handle file(CreateFileW(GHC_NATIVEWP(p), 0, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 0, OPEN_EXISTING, FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS, 0));
if (!file) {
ec = detail::make_system_error();
return nullptr;
}
@ -4162,10 +4208,10 @@ GHC_INLINE bool equivalent(const path& p1, const path& p2, std::error_code& ec)
{
ec.clear();
#ifdef GHC_OS_WINDOWS
std::shared_ptr<void> file1(::CreateFileW(GHC_NATIVEWP(p1), 0, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0), CloseHandle);
detail::unique_handle file1(::CreateFileW(GHC_NATIVEWP(p1), 0, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0));
auto e1 = ::GetLastError();
std::shared_ptr<void> file2(::CreateFileW(GHC_NATIVEWP(p2), 0, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0), CloseHandle);
if (file1.get() == INVALID_HANDLE_VALUE || file2.get() == INVALID_HANDLE_VALUE) {
detail::unique_handle file2(::CreateFileW(GHC_NATIVEWP(p2), 0, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0));
if (!file1 || !file2) {
#ifdef LWG_2937_BEHAVIOUR
ec = detail::make_system_error(e1 ? e1 : ::GetLastError());
#else
@ -4255,9 +4301,9 @@ GHC_INLINE uintmax_t hard_link_count(const path& p, std::error_code& ec) noexcep
ec.clear();
#ifdef GHC_OS_WINDOWS
uintmax_t result = static_cast<uintmax_t>(-1);
std::shared_ptr<void> file(::CreateFileW(GHC_NATIVEWP(p), 0, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0), CloseHandle);
detail::unique_handle file(::CreateFileW(GHC_NATIVEWP(p), 0, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0));
BY_HANDLE_FILE_INFORMATION inf;
if (file.get() == INVALID_HANDLE_VALUE) {
if (!file) {
ec = detail::make_system_error();
}
else {
@ -4486,7 +4532,7 @@ GHC_INLINE void last_write_time(const path& p, file_time_type new_time, std::err
ec.clear();
auto d = new_time.time_since_epoch();
#ifdef GHC_OS_WINDOWS
std::shared_ptr<void> file(::CreateFileW(GHC_NATIVEWP(p), FILE_WRITE_ATTRIBUTES, FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL), ::CloseHandle);
detail::unique_handle file(::CreateFileW(GHC_NATIVEWP(p), FILE_WRITE_ATTRIBUTES, FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL));
FILETIME ft;
auto tt = std::chrono::duration_cast<std::chrono::microseconds>(d).count() * 10 + 116444736000000000;
ft.dwLowDateTime = static_cast<DWORD>(tt);
@ -4840,8 +4886,8 @@ GHC_INLINE void resize_file(const path& p, uintmax_t size, std::error_code& ec)
#endif
return;
}
std::shared_ptr<void> file(CreateFileW(GHC_NATIVEWP(p), GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL), CloseHandle);
if (file.get() == INVALID_HANDLE_VALUE) {
detail::unique_handle file(CreateFileW(GHC_NATIVEWP(p), GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL));
if (!file) {
ec = detail::make_system_error();
}
else if (SetFilePointerEx(file.get(), lisize, NULL, FILE_BEGIN) == 0 || SetEndOfFile(file.get()) == 0) {