stack_alloc.h File Reference

Temporary memory allocation on stack. More...

#include "opus_types.h"
#include "opus_defines.h"
#include "os_support.h"

Go to the source code of this file.

Macros
#define	ALIGN(stack, size)   ((stack) += ((size) - (long)(stack)) & ((size) - 1))
#define	PUSH(stack, size, type)   (ALIGN((stack),sizeof(type)/sizeof(char)),(stack)+=(size)*(sizeof(type)/sizeof(char)),(type*)((stack)-(size)*(sizeof(type)/sizeof(char))))
#define	RESTORE_STACK   (global_stack = _saved_stack)
#define	ALLOC_STACK   char *_saved_stack; (global_stack = (global_stack==0) ? (scratch_ptr=opus_alloc_scratch(GLOBAL_STACK_SIZE)) : global_stack); _saved_stack = global_stack;
#define	VARDECL(type, var)   type *var
#define	ALLOC(var, size, type)   var = PUSH(global_stack, size, type)
#define	SAVE_STACK   char *_saved_stack = global_stack;
#define	ALLOC_NONE   0
#define	OPUS_CHECK_ARRAY(ptr, len)   _opus_false()
#define	OPUS_CHECK_VALUE(value)   _opus_false()
#define	OPUS_PRINT_INT(value)   do{}while(0)
#define	OPUS_FPRINTF   (void)

Variables
char *	global_stack
char *	scratch_ptr

Detailed Description

Temporary memory allocation on stack.

Macro Definition Documentation

ALIGN

#define ALIGN	(		stack,
			size
	)		((stack) += ((size) - (long)(stack)) & ((size) - 1))

Aligns the stack to a 'size' boundary

Parameters

stack	Stack
size	New size boundary

ALLOC

#define ALLOC	(		var,
			size,
			type
	)		var = PUSH(global_stack, size, type)

Allocate 'size' elements of 'type' on stack

Parameters

var	Name of variable to allocate
size	Number of elements
type	Type of element

ALLOC_NONE

#define ALLOC_NONE   0

ALLOC_STACK

#define ALLOC_STACK   char *_saved_stack; (global_stack = (global_stack==0) ? (scratch_ptr=opus_alloc_scratch(GLOBAL_STACK_SIZE)) : global_stack); _saved_stack = global_stack;

OPUS_CHECK_ARRAY

#define OPUS_CHECK_ARRAY	(		ptr,
			len
	)		_opus_false()

OPUS_CHECK_VALUE

#define OPUS_CHECK_VALUE

(

value

)

_opus_false()

OPUS_FPRINTF

#define OPUS_FPRINTF   (void)

OPUS_PRINT_INT

#define OPUS_PRINT_INT

(

value

)

do{}while(0)

PUSH

#define PUSH	(		stack,
			size,
			type
	)		(ALIGN((stack),sizeof(type)/sizeof(char)),(stack)+=(size)*(sizeof(type)/sizeof(char)),(type*)((stack)-(size)*(sizeof(type)/sizeof(char))))

Allocates 'size' elements of type 'type' on the stack

Parameters

stack	Stack
size	Number of elements
type	Type of element

RESTORE_STACK

#define RESTORE_STACK   (global_stack = _saved_stack)

SAVE_STACK

#define SAVE_STACK   char *_saved_stack = global_stack;

VARDECL

#define VARDECL	(		type,
			var
	)		type *var

Declare variable on stack

Parameters

var	Variable to declare

Variable Documentation

global_stack

char* global_stack

scratch_ptr

char* scratch_ptr