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mem_realloc: Added assert to check that memory is shrinked, not expanded.

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goldsimon 2007-05-08 10:50:19 +00:00
parent 824ef1ff2c
commit 4dbf1dcad4
1 changed files with 5 additions and 0 deletions
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5
src/core/mem.c
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@ -195,6 +195,10 @@ mem_free(void *rmem)
sys_sem_signal(mem_sem);
}
/* In contrast to its name, mem_realloc can only shrink memory, not expand it.
* Since the only use (for now) is in pbuf_realloc (which also can only shrink),
* this shouldn't be a problem!
*/
void *
mem_realloc(void *rmem, mem_size_t newsize)
{
@ -226,6 +230,7 @@ mem_realloc(void *rmem, mem_size_t newsize)
ptr = (u8_t *)mem - ram;
size = mem->next - ptr - SIZEOF_STRUCT_MEM;
LWIP_ASSERT("mem_realloc can only shrink memory", newsize <= size);
#if MEM_STATS
lwip_stats.mem.used -= (size - newsize);
#endif /* MEM_STATS */