/*********************************************************************************************************************** | |
* DISCLAIMER | |
* This software is supplied by Renesas Electronics Corporation and is only | |
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* software is owned by Renesas Electronics Corporation and is protected under | |
* all applicable laws, including copyright laws. | |
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* THIS SOFTWARE, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING BUT NOT | |
* LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE | |
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* | |
* Copyright (C) 2013 Renesas Electronics Corporation. All rights reserved. | |
***********************************************************************************************************************/ | |
/*********************************************************************************************************************** | |
* File Name : r_cg_sbrk.c | |
* Version : Applilet4 for RX64M V1.00.00.00 [02 Aug 2013] | |
* Device(s) : R5F564MLHxFC | |
* Tool-Chain : CCRX | |
* Description : Program of sbrk. | |
* Creation Date: 07/02/2014 | |
***********************************************************************************************************************/ | |
/*********************************************************************************************************************** | |
Pragma directive | |
***********************************************************************************************************************/ | |
/* Start user code for pragma. Do not edit comment generated here */ | |
/* End user code. Do not edit comment generated here */ | |
/*********************************************************************************************************************** | |
Includes | |
***********************************************************************************************************************/ | |
#include "r_cg_macrodriver.h" | |
#include <stddef.h> | |
#include <stdio.h> | |
#include "r_cg_sbrk.h" | |
#include "r_cg_userdefine.h" | |
/*********************************************************************************************************************** | |
Global variables and functions | |
***********************************************************************************************************************/ | |
int8_t *sbrk(size_t size); | |
extern int8_t *_s1ptr; | |
union HEAP_TYPE | |
{ | |
int16_t dummy ; /* Dummy for 4-byte boundary */ | |
int8_t heap[HEAPSIZE]; /* Declaration of the area managed by sbrk */ | |
}; | |
static union HEAP_TYPE heap_area ; | |
/* End address allocated by sbrk */ | |
static int8_t *brk = (int8_t *) &heap_area; | |
/**************************************************************************/ | |
/* sbrk:Memory area allocation */ | |
/* Return value:Start address of allocated area (Pass) */ | |
/* -1 (Failure) */ | |
/**************************************************************************/ | |
int8_t *sbrk(size_t size) /* Assigned area size */ | |
{ | |
int8_t *p; | |
if (brk+size > heap_area.heap + HEAPSIZE) /* Empty area size */ | |
{ | |
p = (int8_t *)-1; | |
} | |
else | |
{ | |
p = brk; /* Area assignment */ | |
brk += size; /* End address update */ | |
} | |
return p; | |
} | |
/* Start user code for adding. Do not edit comment generated here */ | |
/* End user code. Do not edit comment generated here */ |