Fix #1933 on Linux and macOS
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This commit is contained in:
yhirose 2024-09-09 23:07:11 -04:00
parent 9f8db2c230
commit de36ea7755

View file

@ -2470,12 +2470,12 @@ private:
#if defined(_WIN32)
HANDLE hFile_ = NULL;
HANDLE hMapping_ = NULL;
bool is_open_empty_file_on_windows_ = false;
#else
int fd_ = -1;
#endif
size_t size_ = 0;
void *addr_ = nullptr;
bool is_open_empty_file = false;
};
} // namespace detail
@ -2940,10 +2940,10 @@ inline bool mmap::open(const char *path) {
hMapping_ = ::CreateFileMappingW(hFile_, NULL, PAGE_READONLY, 0, 0, NULL);
#endif
// TODO: Special treatment for an empty file on Windows... (#1933)
// Special treatment for an empty file...
if (hMapping_ == NULL && size_ == 0) {
close();
is_open_empty_file_on_windows_ = true;
is_open_empty_file = true;
return true;
}
@ -2975,8 +2975,10 @@ inline bool mmap::open(const char *path) {
addr_ = ::mmap(NULL, size_, PROT_READ, MAP_PRIVATE, fd_, 0);
if (addr_ == MAP_FAILED) {
// Special treatment for an empty file...
if (addr_ == MAP_FAILED && size_ == 0) {
close();
is_open_empty_file = true;
return false;
}
#endif
@ -2985,23 +2987,13 @@ inline bool mmap::open(const char *path) {
}
inline bool mmap::is_open() const {
#if defined(_WIN32)
if (is_open_empty_file_on_windows_) {
return true;
}
#endif
return addr_ != nullptr;
return is_open_empty_file ? true : addr_ != nullptr;
}
inline size_t mmap::size() const { return size_; }
inline const char *mmap::data() const {
#if defined(_WIN32)
if (is_open_empty_file_on_windows_) {
return "";
}
#endif
return static_cast<const char *>(addr_);
return is_open_empty_file ? "" : static_cast<const char *>(addr_);
}
inline void mmap::close() {
@ -3021,7 +3013,7 @@ inline void mmap::close() {
hFile_ = INVALID_HANDLE_VALUE;
}
is_open_empty_file_on_windows_ = false;
is_open_empty_file = false;
#else
if (addr_ != nullptr) {
munmap(addr_, size_);