atomic_sub_and_test.h File Reference

#include <sync_utils.h>
#include <atomic.h>

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Functions
static __inline int	_atomic_sub_and_test (int a, atomic_ea_t v)

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Function Documentation

static __inline int _atomic_sub_and_test	(	int	a,
		atomic_ea_t	v
	)		[static]

atomic_sub_and_test - atomically subtract and test if previous==0. : handle to effective address of counter. : value to be subtracted.

Atomically subtract a value from a counter in system memory and test if previous==0. The only restriction is that must be word aligned.

Returns the previous value from system memory.

References ATOMIC_OP.