/*
* Ensure that we have space for a given number of entries
*/
void CVmMetaTable::ensure_space(size_t entries, size_t increment)
{
/* if we don't have enough space, allocate more */
if (entries >= alloc_)
{
size_t new_size;
/* increase the allocation size by the given increment */
alloc_ += increment;
/* if it's still too small, bump it up to the required size */
if (alloc_ < entries)
alloc_ = entries;
/* compute the new size */
new_size = alloc_ * sizeof(table_[0]);
/*
* if we have a table already, reallocate it at the larger size;
* otherwise, allocate a new table
*/
if (table_ != 0)
table_ = (vm_meta_entry_t *)t3realloc(table_, new_size);
else
table_ = (vm_meta_entry_t *)t3malloc(new_size);
}
}
/*
* allocate a new page
*/
void CTcDataStream::alloc_page()
{
/*
* if we're coming back to a page that was previously allocated, we
* need merely re-establish the existing page
*/
if (page_cur_ + 1 < page_cnt_)
{
/* move to the next page */
++page_cur_;
/* start writing at the start of the page */
wp_ = pages_[page_cur_];
rem_ = TCCS_PAGE_SIZE;
/* we're done */
return;
}
/*
* if we don't have room for a new page in the page array, expand
* the page array
*/
if (page_cnt_ >= page_slots_)
{
/* increase the page slot count */
page_slots_ += 100;
/* allocate or reallocate the page array */
if (pages_ == 0)
pages_ = (char **)t3malloc(page_slots_ * sizeof(pages_[0]));
else
pages_ = (char **)t3realloc(pages_,
page_slots_ * sizeof(pages_[0]));
/* if that failed, throw an error */
if (pages_ == 0)
err_throw(TCERR_CODEGEN_NO_MEM);
}
/* allocate the new page */
pages_[page_cnt_] = (char *)t3malloc(TCCS_PAGE_SIZE);
/* throw an error if we couldn't allocate the page */
if (pages_[page_cnt_] == 0)
err_throw(TCERR_CODEGEN_NO_MEM);
/* start writing at the start of the new page */
wp_ = pages_[page_cnt_];
/* the entire page is free */
rem_ = TCCS_PAGE_SIZE;
/* make the new page the current page */
page_cur_ = page_cnt_;
/* count the new page */
++page_cnt_;
}
/* reserve space for an addition 'b' bytes */
void reserve(size_t b)
{
if (wrtidx + b + 1 > len)
{
/* increase by the increment until big enough */
while (wrtidx + b + 1 > len)
len += inc;
/* reallocate at the increased size */
buf = (char *)t3realloc(buf, len);
}
}
/*
* Allocate line record pages
*/
void CTcCodeStream::alloc_line_pages(size_t number_to_add)
{
size_t siz;
size_t i;
/* create or expand the master page array */
siz = (line_pages_alloc_ + number_to_add) * sizeof(tcgen_line_page_t *);
if (line_pages_ == 0)
line_pages_ = (tcgen_line_page_t **)t3malloc(siz);
else
line_pages_ = (tcgen_line_page_t **)t3realloc(line_pages_, siz);
/* allocate the new pages */
for (i = line_pages_alloc_ ; i < line_pages_alloc_ + number_to_add ; ++i)
{
/* allocate this page */
line_pages_[i] = (tcgen_line_page_t *)
t3malloc(sizeof(tcgen_line_page_t));
}
/* remember the new allocation */
line_pages_alloc_ += number_to_add;
}
