cpu.h File Reference

#include "lib/sysdep/compiler.h"

Go to the source code of this file.

Namespaces
	ERR
	Introduction

Functions
LIB_API const char *	cpu_IdentifierString ()
LIB_API intptr_t	cpu_AtomicAdd (volatile intptr_t *location, intptr_t increment)
	add a signed value to a variable without the possibility of interference from other threads/CPUs. More...
LIB_API bool	cpu_CAS (volatile intptr_t *location, intptr_t expected, intptr_t newValue)
	atomic "compare and swap". More...
LIB_API bool	cpu_CAS64 (volatile i64 *location, i64 expected, i64 newValue)
template<typename T >
bool	cpu_CAS (volatile T *location, T expected, T new_value)
	specialization of cpu_CAS for pointer types. More...
LIB_API void	cpu_Test ()
void	cpu_Pause ()
	pause in spin-wait loops, as a performance optimisation. More...

Variables
const Status	ERR::CPU_FEATURE_MISSING = -130000
const Status	ERR::CPU_UNKNOWN_OPCODE = -130001
const Status	ERR::CPU_UNKNOWN_VENDOR = -130002

Function Documentation

LIB_API intptr_t cpu_AtomicAdd	(	volatile intptr_t *	location,
		intptr_t	increment
	)

add a signed value to a variable without the possibility of interference from other threads/CPUs.

Returns

the previous value.

Definition at line 31 of file arm.cpp.

LIB_API bool cpu_CAS	(	volatile intptr_t *	location,
		intptr_t	expected,
		intptr_t	newValue
	)

atomic "compare and swap".

Parameters

location	address of the word to compare and possibly overwrite
expected	its expected value
newValue	the value with which to replace it

Returns

false if the target word doesn't match the expected value, otherwise true (also overwriting the contents of location)

Definition at line 36 of file arm.cpp.

template<typename T >

bool cpu_CAS ( volatile T *  location, T  expected, T  new_value  )

inline

specialization of cpu_CAS for pointer types.

this avoids error-prone casting in user code.

Definition at line 80 of file cpu.h.

LIB_API bool cpu_CAS64	(	volatile i64 *	location,
		i64	expected,
		i64	newValue
	)

Definition at line 41 of file arm.cpp.

LIB_API const char* cpu_IdentifierString

(

)

Returns

string identifying the CPU (usually a cleaned-up version of the brand string)

Definition at line 46 of file arm.cpp.

void cpu_Pause ( )

inline

pause in spin-wait loops, as a performance optimisation.

Definition at line 91 of file cpu.h.

LIB_API void cpu_Test

(

)

Definition at line 66 of file cpu.cpp.