fg_definitions.h File Reference

Common definitions used by the Flowgrind daemon, controller, and libs. More...

#include "config.h"

Go to the source code of this file.

Macros
#define	ASSIGN_MAX(s, c)
	Assign value if it's greater than current one. More...
#define	ASSIGN_MIN(s, c)
	Assign value if it less than current one. More...
#define	FN_APPLY(type, fn, ...)
	To vectorize an arbitrary function that takes any type of pointer. More...
#define	foreach(iter, ...)
	foreach macro for iterating through enum values. More...
#define	free_all(...)   FN_APPLY(void, free, __VA_ARGS__);
	To free() an arbitrary number of variables. More...
#define	likely(x)   __builtin_expect(!!(x), 1)
	These macros gain us a few percent of speed. More...
#define	NARGS(...)   (sizeof((int[]){__VA_ARGS__})/sizeof(int))
	To determine the number of arguments in VA_ARGS. More...
#define	unlikely(x)   __builtin_expect(!!(x), 0) /** @} */
	These macros gain us a few percent of speed. More...
#define	UNUSED_ARGUMENT(x)   (void)x
	Suppress warning for unused argument. More...

Detailed Description

Common definitions used by the Flowgrind daemon, controller, and libs.

Definition in file fg_definitions.h.

Macro Definition Documentation

ASSIGN_MAX

#define ASSIGN_MAX	(		s,
			c
	)

Value:

        ({ typeof (s) _s = (s);         \
           typeof (c) _c = (c);         \
           if (_s < _c) s = c; })

Assign value if it's greater than current one.

Definition at line 68 of file fg_definitions.h.

ASSIGN_MIN

#define ASSIGN_MIN	(		s,
			c
	)

Value:

        ({ typeof (s) _s = (s);         \
           typeof (c) _c = (c);         \
           if (_s > _c) s = c; })

Assign value if it less than current one.

Definition at line 62 of file fg_definitions.h.

FN_APPLY

#define FN_APPLY	(		type,
			fn,
			...
	)

Value:

        do {                            \
        void *stopper = (int[]){0};                             \
        void **list = (type*[]){__VA_ARGS__, stopper};          \
        for (int i=0; list[i] != stopper; i++)                  \
                fn(list[i]);                                    \
} while(0)

To vectorize an arbitrary function that takes any type of pointer.

Definition at line 51 of file fg_definitions.h.

foreach

#define foreach	(		iter,
			...
	)

Value:

        for(int keep = 1, count = 0, size = NARGS(__VA_ARGS__);     \
            keep && count != size; keep = !keep, count++)           \
                for(iter = ((int[]){__VA_ARGS__}) + count;          \
                    keep; keep = !keep)

foreach macro for iterating through enum values.

Definition at line 44 of file fg_definitions.h.

free_all

#define free_all

(

...

)

FN_APPLY(void, free, __VA_ARGS__);

To free() an arbitrary number of variables.

Definition at line 59 of file fg_definitions.h.

likely

#define likely

(

x

)

__builtin_expect(!!(x), 1)

These macros gain us a few percent of speed.

Definition at line 34 of file fg_definitions.h.

NARGS

#define NARGS

(

...

)

(sizeof((int[]){__VA_ARGS__})/sizeof(int))

To determine the number of arguments in VA_ARGS.

Definition at line 41 of file fg_definitions.h.

unlikely

#define unlikely

(

x

)

__builtin_expect(!!(x), 0) /** @} */

These macros gain us a few percent of speed.

Definition at line 35 of file fg_definitions.h.

UNUSED_ARGUMENT

#define UNUSED_ARGUMENT

(

x

)

(void)x

Suppress warning for unused argument.

Definition at line 38 of file fg_definitions.h.