Atomic Operations

These functions are used for atomically operating on 32 bit values in memory. More...

Collaboration diagram for Atomic Operations:

Functions
BOOL	OSCompareAndSwapAtomic (volatile uint32_t *ptr, uint32_t compare, uint32_t value)
BOOL	OSCompareAndSwapAtomicEx (volatile uint32_t *ptr, uint32_t compare, uint32_t value, uint32_t *old)
uint32_t	OSSwapAtomic (volatile uint32_t *ptr, uint32_t value)
int32_t	OSAddAtomic (volatile int32_t *ptr, int32_t value)
uint32_t	OSAndAtomic (volatile uint32_t *ptr, uint32_t value)
uint32_t	OSOrAtomic (volatile uint32_t *ptr, uint32_t value)
uint32_t	OSXorAtomic (volatile uint32_t *ptr, uint32_t value)
BOOL	OSTestAndClearAtomic (volatile uint32_t *ptr, uint32_t bit)
BOOL	OSTestAndSetAtomic (volatile uint32_t *ptr, uint32_t bit)

Detailed Description

These functions are used for atomically operating on 32 bit values in memory.

Function Documentation

OSCompareAndSwapAtomic()

BOOL OSCompareAndSwapAtomic	(	volatile uint32_t *	ptr,
		uint32_t	compare,
		uint32_t	value
	)

OSCompareAndSwapAtomicEx()

BOOL OSCompareAndSwapAtomicEx	(	volatile uint32_t *	ptr,
		uint32_t	compare,
		uint32_t	value,
		uint32_t *	old
	)

OSSwapAtomic()

uint32_t OSSwapAtomic	(	volatile uint32_t *	ptr,
		uint32_t	value
	)

OSAddAtomic()

int32_t OSAddAtomic	(	volatile int32_t *	ptr,
		int32_t	value
	)

OSAndAtomic()

uint32_t OSAndAtomic	(	volatile uint32_t *	ptr,
		uint32_t	value
	)

OSOrAtomic()

uint32_t OSOrAtomic	(	volatile uint32_t *	ptr,
		uint32_t	value
	)

OSXorAtomic()

uint32_t OSXorAtomic	(	volatile uint32_t *	ptr,
		uint32_t	value
	)

OSTestAndClearAtomic()

BOOL OSTestAndClearAtomic	(	volatile uint32_t *	ptr,
		uint32_t	bit
	)

OSTestAndSetAtomic()

BOOL OSTestAndSetAtomic	(	volatile uint32_t *	ptr,
		uint32_t	bit
	)