add rt_memheap_realloc function

This commit is contained in:
Bernard Xiong 2013-04-17 22:09:48 +08:00
parent 8185f9888d
commit 608bf2cb3d
2 changed files with 23 additions and 0 deletions

View File

@ -242,6 +242,7 @@ rt_err_t rt_memheap_init(struct rt_memheap *memheap,
rt_uint32_t size);
rt_err_t rt_memheap_detach(struct rt_memheap *heap);
void* rt_memheap_alloc(struct rt_memheap *heap, rt_uint32_t size);
void *rt_memheap_realloc(struct rt_memheap* heap, void* ptr, rt_size_t newsize);
void rt_memheap_free(void *ptr);
#endif

View File

@ -13,6 +13,7 @@
* 2012-10-16 Bernard add the mutex lock for heap object.
* 2012-12-29 Bernard memheap can be used as system heap.
* change mutex lock to semaphore lock.
* 2013-04-10 Bernard add rt_memheap_realloc function.
*/
#include <rthw.h>
@ -277,6 +278,27 @@ void *rt_memheap_alloc(struct rt_memheap *heap, rt_uint32_t size)
}
RTM_EXPORT(rt_memheap_alloc);
void *rt_memheap_realloc(struct rt_memheap* heap, void* ptr, rt_size_t newsize)
{
void* new_ptr;
if (newsize == 0)
{
rt_memheap_free(ptr);
}
if (ptr == RT_NULL)
{
return rt_memheap_alloc(heap, newsize);
}
new_ptr = rt_memheap_alloc(heap, newsize);
if (new_ptr == RT_NULL) return RT_NULL;
rt_memcpy(new_ptr, ptr, newsize);
return new_ptr;
}
RTM_EXPORT(rt_memheap_realloc);
void rt_memheap_free(void *ptr)
{
rt_err_t result;