test.c

单片机动态内存分配代码,实现malloc.

#include "DynAlloc.h"

int main (void)
{
	volatile Mem_Handle_t MyMem1 = Mem_Alloc(BLOCK_SIZE);	
	volatile uint8_t BlockRem1 = Mem_TotalFreeBlocks();
	
	volatile Mem_Handle_t MyMem2 = Mem_Alloc(BLOCK_SIZE);
	volatile uint8_t BlockRem2 = Mem_TotalFreeBlocks();

	volatile Mem_Handle_t MyMem3 = Mem_Alloc(BLOCK_SIZE);
	volatile uint8_t BlockRem3 = Mem_TotalFreeBlocks();

	if ((MyMem1 == NULL) || (MyMem2 == NULL) || (MyMem3 == NULL))
	{
		PORTC = 0xFF;
		for (;;);
	}

	DEREF(MyMem1, char*)[0] = 1;
	DEREF(MyMem2, char*)[0] = 2;
	DEREF(MyMem3, char*)[0] = 3;
	
	Mem_Free(MyMem1);
	volatile uint8_t BlockRem4 = Mem_TotalFreeBlocks();
	MyMem1 = Mem_Alloc(BLOCK_SIZE * 2);
	
	if (MyMem1 == NULL)
	{
		PORTC = 0xFF;
		for (;;);
	}
	else
	{
		PORTC = 0x0F;
		DEREF(MyMem1, char*)[0] = 1;
	}

	DEREF(MyMem2, char*)[1] = 1;
	DEREF(MyMem3, char*)[1] = 2;
	DEREF(MyMem1, char*)[1] = 3;
}