ref: c601db956a682167e4f670f02144f225e8c27621
dir: /vpx_mem/memory_manager/hmm_largest.c/
/* * Copyright (c) 2010 The VP8 project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license and patent * grant that can be found in the LICENSE file in the root of the source * tree. All contributing project authors may be found in the AUTHORS * file in the root of the source tree. */ /* This code is in the public domain. ** Version: 1.1 Author: Walt Karas */ #include "hmm_intrnl.h" U(size_aau) U(largest_available)(U(descriptor) *desc) { U(size_bau) largest; if (!(desc->avl_tree_root)) largest = 0; else { #ifdef HMM_AUDIT_FAIL /* Audit root block in AVL tree. */ AUDIT_BLOCK(PTR_REC_TO_HEAD(desc->avl_tree_root)) #endif largest = BLOCK_BAUS( PTR_REC_TO_HEAD( U(avl_search)( (U(avl_avl) *) & (desc->avl_tree_root), (U(size_bau)) ~(U(size_bau)) 0, AVL_LESS))); } if (desc->last_freed) { /* Size of last freed block. */ register U(size_bau) lf_size; #ifdef HMM_AUDIT_FAIL AUDIT_BLOCK(desc->last_freed) #endif lf_size = BLOCK_BAUS(desc->last_freed); if (lf_size > largest) largest = lf_size; } /* Convert largest size to AAUs and subract head size leaving payload ** size. */ return(largest ? ((largest * ((U(size_aau)) HMM_BLOCK_ALIGN_UNIT)) - HEAD_AAUS) : 0); }