xentara::utils::windows Namespace Reference

Windows functionality. More...

Namespaces
namespace	com
	Windows COM functionality.
namespace	path
	Filesystem path functionality.
namespace	wmi
	Windows WMI functionality.

Classes
class	AbstractHresultErrorCategory
	Base class for error categories for Windows HRESULT values. More...
class	Handle
	A Windows handle that closes itself on destruct. More...
struct	LocalFreeDeleter
	A deleter that uses LocalFree(). More...
class	LocalFreePointer
	A smart pointer that frees its object using LocalFree(). More...
class	OverlappedResult
	The result of an overlapped operation that used extra wait objects. More...
class	RegistryKey
	A Windows registry key handle that closes itself on destruct. More...
class	Sid
	A Windows security descriptor (SID) that is automatically freed on destruct. More...
class	Socket
	A Windows socket that closes itself on destruct. More...

Concepts
concept	RegistryValue
	A concept that describes C++ data types used for registry values.

Functions
auto	retainConsole () -> void
	Make sure that the console is not closed after the application exits.
auto	hresultErrorCategory () -> const std::error_category &
	Returns the global error category for use with Windows HRESULT values.
auto	wait (const std::function< auto(DWORD) → DWORD > &waitFunction, std::optional< std::chrono::nanoseconds > timeout, DWORD timeoutReturnValue=WAIT_TIMEOUT) -> DWORD
	Wrapper to use Windows waiting functions with a nanosecond timeout.

Detailed Description

Windows functionality.

This namespace contains Windows-specific functionality.

Function Documentation

hresultErrorCategory()

auto xentara::utils::windows::hresultErrorCategory

(

)

-> const std::error_category &

Returns the global error category for use with Windows HRESULT values.

Returns

The category.

retainConsole()

auto xentara::utils::windows::retainConsole

(

)

-> void

Make sure that the console is not closed after the application exits.

Under Windows, this function starts a second process in the Windows console, if it would otherwise close once the application has terminated. Use this function to enable the user to read the console output of the application even if it was started from the explorer.

On non-Windows platforms, this function does nothing.

Note

This class is available on all platforms, but is a no-op on non-Windows platforms

wait()

auto xentara::utils::windows::wait	(	const std::function< auto(DWORD) → DWORD > &	waitFunction,
		std::optional< std::chrono::nanoseconds >	timeout,
		DWORD	timeoutReturnValue = WAIT_TIMEOUT
	)		-> DWORD

Wrapper to use Windows waiting functions with a nanosecond timeout.

This function calls a Windows callback like WaitForSingleObject() or SleepEx() using std::chrono::nanoseconds as the timeout value. The timeout is rounded up to milliseconds, and the function is called repeatedly in necessary.

Note

This function is only available under Windows

Parameters

waitFunction	The funmction to use to wait. The function will be passed the timeout as a millisecond value, or the special Windows value INFINITE if timeout is std::nullopt. The function must return timeoutReturnValue if the timeout expires.
timeout	The timeout, or std::nullopt to pass INFINITE to waitFunction.
timeoutReturnValue	The value that waitFunction returns on timeout. This is usually WAIT_TIMEOUT, but SleepEx(), for example, returns 0.