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Reallocate memory for bitmaps only when necessary.

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This commit is contained in:
Michael Brown 2007-11-29 19:10:10 +00:00
parent 423e9d72f3
commit 1de705e30f
1 changed files with 9 additions and 7 deletions
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16
src/core/bitmap.c
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@ -41,14 +41,16 @@ int bitmap_resize ( struct bitmap *bitmap, unsigned int new_length ) {
old_num_blocks = BITMAP_INDEX ( bitmap->length + BITMAP_BLKSIZE - 1 );
new_num_blocks = BITMAP_INDEX ( new_length + BITMAP_BLKSIZE - 1 );
new_size = ( new_num_blocks * sizeof ( bitmap->blocks[0] ) );
new_blocks = realloc ( bitmap->blocks, new_size );
if ( ! new_blocks ) {
DBGC ( bitmap, "Bitmap %p could not resize to %d bits\n",
bitmap, new_length );
return -ENOMEM;
if ( old_num_blocks != new_num_blocks ) {
new_size = ( new_num_blocks * sizeof ( bitmap->blocks[0] ) );
new_blocks = realloc ( bitmap->blocks, new_size );
if ( ! new_blocks ) {
DBGC ( bitmap, "Bitmap %p could not resize to %d "
"bits\n", bitmap, new_length );
return -ENOMEM;
}
bitmap->blocks = new_blocks;
}
bitmap->blocks = new_blocks;
bitmap->length = new_length;
while ( old_num_blocks < new_num_blocks ) {