oro_arch_interface.h File Reference

Please use this template to create new oro_arch.h files for different target architectures or compilers. More...

Go to the source code of this file.

Typedefs
typedef struct oro_atomic_t_interface	oro_atomic_t
Functions
void	ORO_ATOMIC_SETUP (oro_atomic_t *a, int n)
	Initializes the uninitialized atomic structure a with a counter value of 'n'.
void	ORO_ATOMIC_CLEANUP (oro_atomic_t *a)
	Cleans up all resources allocated durint the setup of atomic structure a.
int	oro_atomic_read (oro_atomic_t *a)
	Returns the current counter value of the atomic structure a.
void	oro_atomic_set (oro_atomic_t *a, int n)
	Sets the current counter value of the atomic structure a to n.
void	oro_atomic_add (oro_atomic_t *a, int n)
	Add n to a.
void	oro_atomic_sub (int n, oro_atomic_t *a, int n)
	Substract n from a.
int	oro_atomic_sub_and_test (oro_atomic_t *a, int n)
	Substract n from a and test for zero.
void	oro_atomic_inc (oro_atomic_t *a)
	Increment a atomically.
void	oro_atomic_dec (oro_atomic_t *a)
	Decrement a atomically.
int	oro_atomic_dec_and_test (oro_atomic_t *a)
	Decrement a atomically and test for zero.
int	oro_atomic_inc_and_test (oro_atomic_t *a)
	Increment a atomically and test for zero.
int	oro_cmpxchg (void volatile *ptr, unsigned long o, unsigned long n)
	Compare o with *ptr and swap with n if equal.

---

Detailed Description

Please use this template to create new oro_arch.h files for different target architectures or compilers.

You are free to make any of these functions macros or to declare them inlined.

Do not include this header, it serves only as an example and the expected architecture-specific API of the RTT. Include oro_arch.h instead.

This interface has been inspired on the common intrinsics API's of various compilers, operating systems and processor architectures. Examples are: GCC, Visual Studio and the Intel instruction set.

Definition in file oro_arch_interface.h.

---

Function Documentation

int oro_cmpxchg	(	void volatile *	ptr,
		unsigned long	o,
		unsigned long	n
	)

Compare o with *ptr and swap with n if equal.

Note: you need to implement this function for different sizes of pointers and payloads. You will probably need to implement this function as a macro to resolve this in a way compatible with C.

Referenced by RTT::os::CAS().