yyc12345
3fa05b43d9
- use std::codevct as the convertion method among UTF8, UTF16 and UTF32. - fix the issue that COM Guard was accidently dropped by compiler because no reference to it.
81 lines
2.7 KiB
C++
81 lines
2.7 KiB
C++
#pragma once
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#include "YYCCInternal.hpp"
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#if YYCC_OS == YYCC_OS_WINDOWS
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#include <memory>
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#include "WinImportPrefix.hpp"
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#include <Windows.h>
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#include <shlobj_core.h>
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#include "WinImportSuffix.hpp"
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/**
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* @brief COM fucntions related namespace.
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* @details
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* This namespace is Windows specific and is unavailable on other platforms.
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*
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* This namespace contain a COM Guard which make sure COM was initialized in current module when loading current module.
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* It is essential because all calling to COM functions should be under the premise that COM has been initialized.
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* This guard also will uninitialize COM when unloading this module.
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*
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* This namespace also provided various memory-safe types for interacting with COM functions.
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* Although Microsoft also has similar smart pointer called \c CComPtr.
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* But this library is eager to hide all Microsoft-related functions calling.
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* Using \c CComPtr is not corresponding with the philosophy of this library.
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* So these std-based smart pointer type were created.
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*
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* This namespace is used by internal functions as intended.
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* They should not be used outside of this library.
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* But if you compel to use them, it is also okey.
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*/
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namespace YYCC::COMHelper {
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/**
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* @brief C++ standard deleter for every COM interfaces inheriting IUnknown.
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*/
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class ComPtrDeleter {
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public:
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ComPtrDeleter() {}
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void operator() (IUnknown* com_ptr) {
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if (com_ptr != nullptr) {
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com_ptr->Release();
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}
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}
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};
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using SmartIFileDialog = std::unique_ptr<IFileDialog, ComPtrDeleter>;
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using SmartIFileOpenDialog = std::unique_ptr<IFileOpenDialog, ComPtrDeleter>;
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using SmartIShellItem = std::unique_ptr<IShellItem, ComPtrDeleter>;
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using SmartIShellItemArray = std::unique_ptr<IShellItemArray, ComPtrDeleter>;
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using SmartIShellFolder = std::unique_ptr<IShellFolder, ComPtrDeleter>;
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/**
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* @brief C++ standard deleter for almost raw pointer used in COM which need to be free by CoTaskMemFree()
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*/
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class CoTaskMemDeleter {
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public:
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CoTaskMemDeleter() {}
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void operator() (void* com_ptr) {
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if (com_ptr != nullptr) {
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CoTaskMemFree(com_ptr);
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}
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}
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};
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using SmartLPWSTR = std::unique_ptr<std::remove_pointer_t<LPWSTR>, CoTaskMemDeleter>;
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/**
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* @brief Check whether COM environment has been initialized.
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* @return True if it is, otherwise false.
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* @remarks
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* This function will call corresponding function of COM Guard.
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* Do not remove this function and you must preserve at least one reference to this function in final program.
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* Some compiler will try to drop COM Guard in final program if no reference to it and it will cause the initialization of COM environment failed.
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* This is the reason why I order you do the things said above.
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*/
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bool IsInitialized();
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}
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#endif
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