u_windows.c File Reference

Various helpers for doing Windows specific things. More...

#include "xrt/xrt_windows.h"
#include "util/u_windows.h"
#include "util/u_logging.h"
#include "assert.h"

Include dependency graph for u_windows.c:

Macros
#define	LOG_D(...)   U_LOG_IFL_D(log_level, __VA_ARGS__)
#define	LOG_I(...)   U_LOG_IFL_I(log_level, __VA_ARGS__)
#define	LOG_W(...)   U_LOG_IFL_W(log_level, __VA_ARGS__)
#define	LOG_E(...)   U_LOG_IFL_E(log_level, __VA_ARGS__)
#define	GET_LAST_ERROR_STR(BUF)   (u_winerror(BUF, ARRAY_SIZE(BUF), GetLastError(), true))

Functions
static bool	check_privilege_on_process (HANDLE hProcess, LPCTSTR lpszPrivilege, LPBOOL pfResult)
static bool	enable_privilege_on_process (HANDLE hProcess, LPCTSTR lpszPrivilege)
bool	try_to_grant_privilege (enum u_logging_level log_level, HANDLE hProcess, LPCTSTR lpszPrivilege)
static const char *	get_priority_string (DWORD dwPriorityClass)
static bool	try_to_raise_priority (enum u_logging_level log_level, HANDLE hProcess)
const char *	u_winerror (char *s, size_t size, DWORD err, bool remove_end)
	This function formats a Windows error number, as returned by GetLastError, and writes it into the given buffer. More...
bool	u_win_grant_inc_base_priorty_base_privileges (enum u_logging_level log_level)
	Tries to grant the 'SeIncreaseBasePriorityPrivilege' privilege to this process. More...
bool	u_win_raise_cpu_priority (enum u_logging_level log_level)
	Tries to raise the CPU priority of the process as high as possible. More...
void	u_win_try_privilege_or_priority_from_args (enum u_logging_level log_level, int argc, char *argv[])
	Small helper function that checks process arguments for which to try. More...

Detailed Description

Various helpers for doing Windows specific things.

Author

Jakob Bornecrantz jakob.nosp@m.@col.nosp@m.labor.nosp@m.a.co.nosp@m.m

Function Documentation

u_win_grant_inc_base_priorty_base_privileges()

bool u_win_grant_inc_base_priorty_base_privileges

(

enum u_logging_level

log_level

)

Tries to grant the 'SeIncreaseBasePriorityPrivilege' privilege to this process.

It is needed for HIGH and REALTIME priority Vulkan queues on NVIDIA.

Parameters

log_level

Control the amount of logging this function does.

u_win_raise_cpu_priority()

bool u_win_raise_cpu_priority

(

enum u_logging_level

log_level

)

Tries to raise the CPU priority of the process as high as possible.

Returns false if it could not raise the priority at all. Normal processes can raise themselves from NORMAL to HIGH, while REALTIME requires either administrator privileges or the 'SeIncreaseBasePriorityPrivilege' privilege to be granted.

Parameters

log_level

Control the amount of logging this function does.

u_win_try_privilege_or_priority_from_args()

void u_win_try_privilege_or_priority_from_args	(	enum u_logging_level	log_level,
		int	argc,
		char *	argv[]
	)

Small helper function that checks process arguments for which to try.

The parsing is really simplistic and only looks at the first argument for the values nothing, priority, privilege, both. No argument at all implies the value both making the function try to set both.

Parameters

log_level	Control the amount of logging this function does.
argc	Number of arguments, as passed into main.
argv	Array of argument strings, as passed into main.

u_winerror()

const char* u_winerror	(	char *	buffer,
		size_t	size,
		DWORD	err,
		bool	remove_end
	)

This function formats a Windows error number, as returned by GetLastError, and writes it into the given buffer.

Parameters

buffer	Buffer to format the error into.
size	Size of the given buffer.
err	Error number to format a string for.
remove_end	Removes and trailing \n, \r and . characters.