mira::atomic Namespace Reference

Functions
uint32	inc (volatile uint32 *var)
	Increments the value of the variable pointed to by var and returns its old value. More...
uint32	dec (volatile uint32 *var)
	Decrements the value of the variable pointed to by var and returns its old value. More...
void	write (volatile uint32 *var, uint32 value)
	Sets the value of the variable pointed to by var in an atomic operation. More...
uint32	cas (volatile uint32 *var, uint32 value, uint32 cmp)
	Compare And Swap. More...

Function Documentation

inc()

uint32 mira::atomic::inc ( volatile uint32 *  var )

inline

Increments the value of the variable pointed to by var and returns its old value.

This is the atomic equivalent for:

uint32 tmp = *var;
*var++;
return tmp;

dec()

uint32 mira::atomic::dec ( volatile uint32 *  var )

inline

Decrements the value of the variable pointed to by var and returns its old value.

This is the atomic equivalent for:

uint32 tmp = *var;
*var--;
return tmp;

write()

void mira::atomic::write ( volatile uint32 *  var, uint32  value  )

inline

Sets the value of the variable pointed to by var in an atomic operation.

cas()

uint32 mira::atomic::cas ( volatile uint32 *  var, uint32  value, uint32  cmp  )

inline

Compare And Swap.

Compare the variable '*var' with 'cmp'. If both values are the same, *var is replaced with 'value'. The old value of *var will be returned.

This is the atomic equivalent for:

uint32 tmp = *var;
if(*var == cmp)
    *var = value;
return tmp;