Macros
#define	_Configure_Zero_or_One(_number) ((_number) != 0 ? 1 : 0)

#define	_Configure_Align_up(_val, _align) (((_val) + (_align) - 1) - ((_val) + (_align) - 1) % (_align))

#define	_CONFIGURE_HEAP_MIN_BLOCK_SIZE _Configure_Align_up(sizeof(Heap_Block), CPU_HEAP_ALIGNMENT)

#define	_Configure_From_workspace(_size)

#define	_Configure_From_stackspace(_stack_size) _Configure_From_workspace(_stack_size)

#define	_Configure_Max_Objects(_max) (_Configure_Zero_or_One(_max) * rtems_resource_maximum_per_allocation(_max))

Detailed Description

This module contains items which are used internally to ease the configuration calculations.

Macro Definition Documentation

◆ _Configure_Align_up

#define _Configure_Align_up	(	_val,
		_align
	)	(((_val) + (_align) - 1) - ((_val) + (_align) - 1) % (_align))

General helper to align up a value.

◆ _Configure_From_stackspace

#define _Configure_From_stackspace ( _stack_size ) _Configure_From_workspace(_stack_size)

This is a helper macro used in stack space calculations in this file. It may be provided by the application in case a special task stack allocator is used. The default is allocation from the RTEMS Workspace.

◆ _Configure_From_workspace

#define _Configure_From_workspace ( _size )

Value:

(ssize_t) (_Configure_Zero_or_One(_size) * \
    _Configure_Align_up(_size + HEAP_BLOCK_HEADER_SIZE, \
      _CONFIGURE_HEAP_MIN_BLOCK_SIZE))

This is a helper macro used in calculations in this file. It is used to noted when an element is allocated from the RTEMS Workspace and adds a factor to account for heap overhead plus an alignment factor that may be applied.

◆ _Configure_Max_Objects

#define _Configure_Max_Objects ( _max ) (_Configure_Zero_or_One(_max) * rtems_resource_maximum_per_allocation(_max))

Do not use the unlimited bit as part of the multiplication for memory usage.

◆ _Configure_Zero_or_One

#define _Configure_Zero_or_One ( _number ) ((_number) != 0 ? 1 : 0)

Zero of one returns 0 if the parameter is 0 else 1 is returned.