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| author | Michael Brown | 2007-11-29 20:10:10 +0100 |
|---|---|---|
| committer | Michael Brown | 2007-11-29 20:10:10 +0100 |
| commit | 1de705e30fe5eea7e2f5c721b53666a0fde0120c (patch) | |
| tree | c9b259b1ceae2e0b8196fcb5892f0dd821a5db97 | |
| parent | udp_open_promisc() calls udp_open_common() with peer==NULL. (diff) | |
| download | ipxe-1de705e30fe5eea7e2f5c721b53666a0fde0120c.tar.gz ipxe-1de705e30fe5eea7e2f5c721b53666a0fde0120c.tar.xz ipxe-1de705e30fe5eea7e2f5c721b53666a0fde0120c.zip | |
Reallocate memory for bitmaps only when necessary.
| -rw-r--r-- | src/core/bitmap.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/src/core/bitmap.c b/src/core/bitmap.c index fb5de89a..d0266471 100644 --- a/src/core/bitmap.c +++ b/src/core/bitmap.c @@ -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 ) { |