void
buf_LRU_block_free_non_file_page(
/*=============================*/
buf_block_t* block) /* in: block, must not contain a file page */
{
ut_ad(mutex_own(&(buf_pool->mutex)));
ut_ad(mutex_own(&block->mutex));
ut_ad(block);
ut_a((block->state == BUF_BLOCK_MEMORY)
|| (block->state == BUF_BLOCK_READY_FOR_USE));
ut_a(block->n_pointers == 0);
ut_a(!block->in_free_list);
block->state = BUF_BLOCK_NOT_USED;
UNIV_MEM_ALLOC(block->frame, UNIV_PAGE_SIZE);
#ifdef UNIV_DEBUG
/* Wipe contents of page to reveal possible stale pointers to it */
memset(block->frame, '\0', UNIV_PAGE_SIZE);
#endif
UT_LIST_ADD_FIRST(free, buf_pool->free, block);
block->in_free_list = TRUE;
UNIV_MEM_ASSERT_AND_FREE(block->frame, UNIV_PAGE_SIZE);
if (srv_use_awe && block->frame) {
/* Add to the list of mapped pages */
UT_LIST_ADD_FIRST(awe_LRU_free_mapped,
buf_pool->awe_LRU_free_mapped, block);
}
}
/******************************************************************//**
Frees a block from a memory heap. */
UNIV_INTERN
void
mem_heap_block_free(
/*================*/
mem_heap_t* heap, /*!< in: heap */
mem_block_t* block) /*!< in: block to free */
{
ulint type;
ulint len;
#ifndef UNIV_HOTBACKUP
buf_block_t* buf_block = block->buf_block;
#endif /* !UNIV_HOTBACKUP */
if (block->magic_n != MEM_BLOCK_MAGIC_N) {
mem_analyze_corruption(block);
}
UT_LIST_REMOVE(list, heap->base, block);
#ifdef MEM_PERIODIC_CHECK
mem_pool_mutex_enter();
UT_LIST_REMOVE(mem_block_list, mem_block_list, block);
mem_pool_mutex_exit();
#endif
type = heap->type;
len = block->len;
block->magic_n = MEM_FREED_BLOCK_MAGIC_N;
#ifdef UNIV_MEM_DEBUG
/* In the debug version we set the memory to a random combination
of hex 0xDE and 0xAD. */
mem_erase_buf((byte*)block, len);
#else /* UNIV_MEM_DEBUG */
UNIV_MEM_ASSERT_AND_FREE(block, len);
#endif /* UNIV_MEM_DEBUG */
#ifndef UNIV_HOTBACKUP
if (type == MEM_HEAP_DYNAMIC || len < UNIV_PAGE_SIZE / 2) {
ut_ad(!buf_block);
mem_area_free(block, mem_comm_pool);
} else {
ut_ad(type & MEM_HEAP_BUFFER);
buf_block_free(buf_block);
}
#else /* !UNIV_HOTBACKUP */
ut_free(block);
#endif /* !UNIV_HOTBACKUP */
}
