Commit edb4208e authored by Rémi Denis-Courmont's avatar Rémi Denis-Courmont

Revert "Remove block_Realloc() shrinking behavior"

This reverts commit fd4cb488.

We don't need this commit if we don't use posix_memalign().
parent 609b2216
......@@ -93,6 +93,8 @@ static void BlockMetaCopy( block_t *restrict out, const block_t *in )
#define BLOCK_ALIGN 16
/* Initial reserved header and footer size (must be multiple of alignment) */
#define BLOCK_PADDING 32
/* Maximum size of reserved footer before we release with realloc() */
#define BLOCK_WASTE_SIZE 2048
block_t *block_Alloc( size_t i_size )
{
......@@ -225,6 +227,23 @@ block_t *block_Realloc( block_t *p_block, ssize_t i_prebody, size_t i_body )
block_Release( p_block );
p_block = p_rea;
}
else
/* We have a very large reserved footer now? Release some of it.
* XXX it might not preserve the alignment of p_buffer */
if( p_end - (p_block->p_buffer + i_body) > BLOCK_WASTE_SIZE )
{
const ptrdiff_t i_prebody = p_block->p_buffer - p_start;
const size_t i_new = requested + 1 * BLOCK_PADDING;
block_sys_t *p_new = realloc( p_sys, sizeof (*p_sys) + i_new );
if( p_new != NULL )
{
p_sys = p_new;
p_sys->i_allocated_buffer = i_new;
p_block = &p_sys->self;
p_block->p_buffer = &p_sys->p_allocated_buffer[i_prebody];
}
}
/* NOTE: p_start and p_end are corrupted from this point */
......
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