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fix the magic issue in allocated memory block. 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1344 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong 2011-03-24 06:09:58 +00:00
parent baf5e4143c
commit 96c53b4957
1 changed files with 11 additions and 10 deletions
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21
src/mem.c
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@ -233,7 +233,7 @@ void *rt_malloc(rt_size_t size)
rt_kprintf("malloc size %d, but align to %d\n", size, RT_ALIGN(size, RT_ALIGN_SIZE));
else
rt_kprintf("malloc size %d\n", size);
#endif
#endif
/* alignment size */
size = RT_ALIGN(size, RT_ALIGN_SIZE);
@ -279,7 +279,6 @@ void *rt_malloc(rt_size_t size)
/* create mem2 struct */
mem2 = (struct heap_mem *)&heap_ptr[ptr2];
mem2->magic = HEAP_MAGIC;
mem2->used = 0;
mem2->next = mem->next;
mem2->prev = ptr;
@ -312,6 +311,8 @@ void *rt_malloc(rt_size_t size)
if (max_mem < used_mem) max_mem = used_mem;
#endif
}
/* set memory block magic */
mem->magic = HEAP_MAGIC;
if (mem == lfree)
{
@ -327,8 +328,8 @@ void *rt_malloc(rt_size_t size)
RT_ASSERT((((rt_uint32_t)mem) & (RT_ALIGN_SIZE-1)) == 0);
#ifdef RT_MEM_DEBUG
rt_kprintf("allocate memory at 0x%x, size: %d\n",
(rt_uint32_t)((rt_uint8_t*)mem + SIZEOF_STRUCT_MEM),
rt_kprintf("allocate memory at 0x%x, size: %d\n",
(rt_uint32_t)((rt_uint8_t*)mem + SIZEOF_STRUCT_MEM),
(rt_uint32_t)(mem->next - ((rt_uint8_t*)mem - heap_ptr)));
#endif
@ -470,11 +471,11 @@ void rt_free(void *rmem)
if (rmem == RT_NULL) return;
RT_ASSERT((((rt_uint32_t)rmem) & (RT_ALIGN_SIZE-1)) == 0);
RT_ASSERT((rt_uint8_t *)rmem >= (rt_uint8_t *)heap_ptr &&
(rt_uint8_t *)rmem < (rt_uint8_t *)heap_end);
(rt_uint8_t *)rmem < (rt_uint8_t *)heap_end);
#ifdef RT_USING_HOOK
if (rt_free_hook != RT_NULL) rt_free_hook(rmem);
#endif
#endif
if ((rt_uint8_t *)rmem < (rt_uint8_t *)heap_ptr || (rt_uint8_t *)rmem >= (rt_uint8_t *)heap_end)
{
@ -488,8 +489,8 @@ void rt_free(void *rmem)
mem = (struct heap_mem *)((rt_uint8_t *)rmem - SIZEOF_STRUCT_MEM);
#ifdef RT_MEM_DEBUG
rt_kprintf("release memory 0x%x, size: %d\n",
(rt_uint32_t)rmem,
rt_kprintf("release memory 0x%x, size: %d\n",
(rt_uint32_t)rmem,
(rt_uint32_t)(mem->next - ((rt_uint8_t*)mem - heap_ptr)));
#endif
@ -497,10 +498,10 @@ void rt_free(void *rmem)
rt_sem_take(&heap_sem, RT_WAITING_FOREVER);
/* ... which has to be in a used state ... */
RT_ASSERT(mem->used);
RT_ASSERT(mem->used);
RT_ASSERT(mem->magic == HEAP_MAGIC);
/* ... and is now unused. */
mem->used = 0;
mem->used = 0;
mem->magic = 0;
if (mem < lfree)