ref: c6a1ff223b80f77ae08c4a6fab2e11843c0a2e37
dir: /vpx_mem/memory_manager/hmm_grow.c/
/* * Copyright (c) 2010 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. 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" void U(grow_chunk)(U(descriptor) *desc, void *end, U(size_bau) n_baus) { #undef HEAD_PTR #define HEAD_PTR ((head_record *) end) end = BAUS_BACKWARD(end, DUMMY_END_BLOCK_BAUS); #ifdef HMM_AUDIT_FAIL if (HEAD_PTR->block_size != 0) /* Chunk does not have valid dummy end block. */ HMM_AUDIT_FAIL #endif /* Create a new block that absorbs the old dummy end block. */ HEAD_PTR->block_size = n_baus; /* Set up the new dummy end block. */ { head_record *dummy = (head_record *) BAUS_FORWARD(end, n_baus); dummy->previous_block_size = n_baus; dummy->block_size = 0; } /* Simply free the new block, allowing it to coalesce with any ** free block at that was the last block in the chunk prior to ** growth. */ U(free)(desc, HEAD_TO_PTR_REC(end)); #undef HEAD_PTR }