a_util::system Namespace Reference

Serves as component for portable OS (Windows, Linux, ...) functionality. More...

Classes
class	AddressInfo
	Address info class This class can be used to query information about a memory address (e.g. More...
class	HighResSchedulingSupport
	RAII class for high resolution scheduling support from the OS. More...
class	Timer
	Periodic timer running in a separate thread. More...

Functions
std::string	getCurrentUserName ()
	Get the current user name. More...
std::string	getHostname ()
	Get the current hostname. More...
a_util::filesystem::Path	getExecutablePath ()
	Get full path to the executable that started the calling system process. More...
int	getLastSystemError ()
	Get the last system error (platform specific, errno or GetLastError) More...
void	resetLastSystemError ()
	Reset last system error to its initial value.
std::string	formatSystemError (int system_error_code)
	Get the description message associated with the given system error code. More...
void	sleepMilliseconds (std::uint32_t ms)
	Yield calling thread to the operating system, scheduled to awake after a period of milliseconds. More...
void	sleepMicroseconds (std::uint64_t us)
	Yields calling thread to the operating system, scheduled to awake after a period of microseconds. More...
timestamp_t	getCurrentMilliseconds ()
	Get the current milliseconds passed since system start. More...
timestamp_t	getCurrentMicroseconds ()
	Get the current microseconds passed since the first invocation (or -1 if not available) More...
std::string	generateUUIDv4 ()
	Generate a UUIDv4 string. More...

Detailed Description

Serves as component for portable OS (Windows, Linux, ...) functionality.

Function Documentation

formatSystemError()

std::string a_util::system::formatSystemError

(

int

system_error_code

)

Get the description message associated with the given system error code.

Parameters

[in]

system_error_code

The error code to get the description for.

Returns

Description associated with the system error code

generateUUIDv4()

std::string a_util::system::generateUUIDv4

(

)

Generate a UUIDv4 string.

Returns

A fully randomized UUIDv4 string

getCurrentMicroseconds()

timestamp_t a_util::system::getCurrentMicroseconds

(

)

Get the current microseconds passed since the first invocation (or -1 if not available)

Note

This method requires high-resolution timer support in the OS

Returns

System running time in microseconds

Referenced by basic_semaphore< Mutex, CondVar >::wait_for().

getCurrentMilliseconds()

timestamp_t a_util::system::getCurrentMilliseconds

(

)

Get the current milliseconds passed since system start.

Returns

System running time in milliseconds

getCurrentUserName()

std::string a_util::system::getCurrentUserName

(

)

Get the current user name.

Returns

The current name of the user

getExecutablePath()

a_util::filesystem::Path a_util::system::getExecutablePath

(

)

Get full path to the executable that started the calling system process.

Returns

Absolute path and including to the executable

getHostname()

std::string a_util::system::getHostname

(

)

Get the current hostname.

Returns

The hostname

getLastSystemError()

int a_util::system::getLastSystemError

(

)

Get the last system error (platform specific, errno or GetLastError)

Returns

The last system error code

sleepMicroseconds()

void a_util::system::sleepMicroseconds

(

std::uint64_t

us

)

Yields calling thread to the operating system, scheduled to awake after a period of microseconds.

Note

To achieve the high resolution, use HighResSchedulingSupport

Parameters

[in]

us

Duration to yield the thread in microseconds

sleepMilliseconds()

void a_util::system::sleepMilliseconds

(

std::uint32_t

ms

)

Yield calling thread to the operating system, scheduled to awake after a period of milliseconds.

Parameters

[in]

ms

Duration to yield the thread in milliseconds