// file : libbuild2/file-cache.ixx -*- C++ -*- // license : MIT; see accompanying LICENSE file namespace build2 { // file_cache::entry // inline const path& file_cache::entry:: path () const { return path_; } inline void file_cache::entry:: pin () { ++pin_; } inline void file_cache::entry:: unpin () { if (--pin_ == 0 && !comp_path_.empty () && (state_ == uncomp || state_ == decomp)) preempt (); } inline file_cache::read file_cache::entry:: open () { assert (state_ != null && state_ != uninit); if (state_ == comp) { decompress (); state_ = decomp; } pin (); return read (*this); } inline file_cache::entry:: operator bool () const { return state_ != null; } inline file_cache::entry:: entry (path_type p, bool t, bool c) : temporary (t), state_ (uninit), path_ (move (p)), comp_path_ (c ? path_ + ".lz4" : path_type ()), pin_ (1) { } inline file_cache::entry:: ~entry () { if (state_ != null && temporary) remove (); } inline file_cache::entry:: entry (entry&& e) noexcept : temporary (e.temporary), state_ (e.state_), path_ (move (e.path_)), comp_path_ (move (e.comp_path_)), pin_ (e.pin_) { e.state_ = null; } inline file_cache::entry& file_cache::entry:: operator= (entry&& e) noexcept { if (this != &e) { assert (state_ == null); temporary = e.temporary; state_ = e.state_; path_ = move (e.path_); comp_path_ = move (e.comp_path_); pin_ = e.pin_; e.state_ = null; } return *this; } // file_cache::write // inline void file_cache::write:: close () { entry_->state_ = entry::uncomp; } inline file_cache::write:: ~write () { if (entry_ != nullptr) entry_->unpin (); } inline file_cache::write:: write (write&& e) noexcept : entry_ (e.entry_) { e.entry_ = nullptr; } inline file_cache::write& file_cache::write:: operator= (write&& e) noexcept { if (this != &e) { assert (entry_ == nullptr); swap (entry_, e.entry_); } return *this; } // file_cache::read // inline file_cache::read:: ~read () { if (entry_ != nullptr) entry_->unpin (); } inline file_cache::read:: read (read&& e) noexcept : entry_ (e.entry_) { e.entry_ = nullptr; } inline file_cache::read& file_cache::read:: operator= (read&& e) noexcept { if (this != &e) { assert (entry_ == nullptr); swap (entry_, e.entry_); } return *this; } // file_cache // inline file_cache::entry file_cache:: create (path f, optional<bool>) { return entry (move (f), true /* temporary */, compress_); } inline file_cache::entry file_cache:: create_existing (path f) { entry e (move (f), false /* temporary */, compress_); e.init_existing (); return e; } inline string file_cache:: compressed_extension (const char* e) { return compress_ ? (e != nullptr ? string (e) : string ()) + ".lz4" : string (); } inline void file_cache:: init (bool compress) { compress_ = compress; } inline file_cache:: file_cache (bool compress) { init (compress); } }