libvpx: Pull from upstream

source/libvpx/vpx_mem/memory_manager/include/hmm_intrnl.h

-/*
- *  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
-*/
-
-#ifndef VPX_MEM_MEMORY_MANAGER_INCLUDE_HMM_INTRNL_H_
-#define VPX_MEM_MEMORY_MANAGER_INCLUDE_HMM_INTRNL_H_
-
-#ifdef __uClinux__
-# include <lddk.h>
-#endif
-
-#include "heapmm.h"
-
-#define U(BASE) HMM_UNIQUE(BASE)
-
-/* Mask of high bit of variable of size_bau type. */
-#define HIGH_BIT_BAU_SIZE \
-  ((U(size_bau)) ~ (((U(size_bau)) ~ (U(size_bau)) 0) >> 1))
-
-/* Add a given number of AAUs to pointer. */
-#define AAUS_FORWARD(PTR, AAU_OFFSET) \
-  (((char *) (PTR)) + ((AAU_OFFSET) * ((U(size_aau)) HMM_ADDR_ALIGN_UNIT)))
-
-/* Subtract a given number of AAUs from pointer. */
-#define AAUS_BACKWARD(PTR, AAU_OFFSET) \
-  (((char *) (PTR)) - ((AAU_OFFSET) * ((U(size_aau)) HMM_ADDR_ALIGN_UNIT)))
-
-/* Add a given number of BAUs to a pointer. */
-#define BAUS_FORWARD(PTR, BAU_OFFSET) \
-  AAUS_FORWARD((PTR), (BAU_OFFSET) * ((U(size_aau)) HMM_BLOCK_ALIGN_UNIT))
-
-/* Subtract a given number of BAUs to a pointer. */
-#define BAUS_BACKWARD(PTR, BAU_OFFSET) \
-  AAUS_BACKWARD((PTR), (BAU_OFFSET) * ((U(size_aau)) HMM_BLOCK_ALIGN_UNIT))
-
-typedef struct head_struct {
-  /* Sizes in Block Alignment Units. */
-  HMM_UNIQUE(size_bau) previous_block_size, block_size;
-}
-head_record;
-
-typedef struct ptr_struct {
-  struct ptr_struct *self, *prev, *next;
-}
-ptr_record;
-
-/* Divide and round up any fraction to the next whole number. */
-#define DIV_ROUND_UP(NUMER, DENOM) (((NUMER) + (DENOM) - 1) / (DENOM))
-
-/* Number of AAUs in a block head. */
-#define HEAD_AAUS DIV_ROUND_UP(sizeof(head_record), HMM_ADDR_ALIGN_UNIT)
-
-/* Number of AAUs in a block pointer record. */
-#define PTR_RECORD_AAUS DIV_ROUND_UP(sizeof(ptr_record), HMM_ADDR_ALIGN_UNIT)
-
-/* Number of BAUs in a dummy end record (at end of chunk). */
-#define DUMMY_END_BLOCK_BAUS DIV_ROUND_UP(HEAD_AAUS, HMM_BLOCK_ALIGN_UNIT)
-
-/* Minimum number of BAUs in a block (allowing room for the pointer record. */
-#define MIN_BLOCK_BAUS \
-  DIV_ROUND_UP(HEAD_AAUS + PTR_RECORD_AAUS, HMM_BLOCK_ALIGN_UNIT)
-
-/* Return number of BAUs in block (masking off high bit containing block
-** status). */
-#define BLOCK_BAUS(HEAD_PTR) \
-  (((head_record *) (HEAD_PTR))->block_size & ~HIGH_BIT_BAU_SIZE)
-
-/* Return number of BAUs in previous block (masking off high bit containing
-** block status). */
-#define PREV_BLOCK_BAUS(HEAD_PTR) \
-  (((head_record *) (HEAD_PTR))->previous_block_size & ~HIGH_BIT_BAU_SIZE)
-
-/* Set number of BAUs in previous block, preserving high bit containing
-** block status. */
-#define SET_PREV_BLOCK_BAUS(HEAD_PTR, N_BAUS) \
-  { register head_record *h_ptr = (head_record *) (HEAD_PTR); \
-    h_ptr->previous_block_size &= HIGH_BIT_BAU_SIZE; \
-    h_ptr->previous_block_size |= (N_BAUS); }
-
-/* Convert pointer to pointer record of block to pointer to block's head
-** record. */
-#define PTR_REC_TO_HEAD(PTR_REC_PTR) \
-  ((head_record *) AAUS_BACKWARD(PTR_REC_PTR, HEAD_AAUS))
-
-/* Convert pointer to block head to pointer to block's pointer record. */
-#define HEAD_TO_PTR_REC(HEAD_PTR) \
-  ((ptr_record *) AAUS_FORWARD(HEAD_PTR, HEAD_AAUS))
-
-/* Returns non-zero if block is allocated. */
-#define IS_BLOCK_ALLOCATED(HEAD_PTR) \
-  (((((head_record *) (HEAD_PTR))->block_size | \
-     ((head_record *) (HEAD_PTR))->previous_block_size) & \
-    HIGH_BIT_BAU_SIZE) == 0)
-
-#define MARK_BLOCK_ALLOCATED(HEAD_PTR) \
-  { register head_record *h_ptr = (head_record *) (HEAD_PTR); \
-    h_ptr->block_size &= ~HIGH_BIT_BAU_SIZE; \
-    h_ptr->previous_block_size &= ~HIGH_BIT_BAU_SIZE; }
-
-/* Mark a block as free when it is not the first block in a bin (and
-** therefore not a node in the AVL tree). */
-#define MARK_SUCCESSIVE_BLOCK_IN_FREE_BIN(HEAD_PTR) \
-  { register head_record *h_ptr = (head_record *) (HEAD_PTR); \
-    h_ptr->block_size |= HIGH_BIT_BAU_SIZE; }
-
-/* Prototypes for internal functions implemented in one file and called in
-** another.
-*/
-
-void U(into_free_collection)(U(descriptor) *desc, head_record *head_ptr);
-
-void U(out_of_free_collection)(U(descriptor) *desc, head_record *head_ptr);
-
-void *U(alloc_from_bin)(
-  U(descriptor) *desc, ptr_record *bin_front_ptr, U(size_bau) n_baus);
-
-#ifdef HMM_AUDIT_FAIL
-
-/* Simply contains a reference to the HMM_AUDIT_FAIL macro and a
-** dummy return. */
-int U(audit_block_fail_dummy_return)(void);
-
-
-/* Auditing a block consists of checking that the size in its head
-** matches the previous block size in the head of the next block. */
-#define AUDIT_BLOCK_AS_EXPR(HEAD_PTR) \
-  ((BLOCK_BAUS(HEAD_PTR) == \
-    PREV_BLOCK_BAUS(BAUS_FORWARD(HEAD_PTR, BLOCK_BAUS(HEAD_PTR)))) ? \
-   0 : U(audit_block_fail_dummy_return)())
-
-#define AUDIT_BLOCK(HEAD_PTR) \
-  { void *h_ptr = (HEAD_PTR); AUDIT_BLOCK_AS_EXPR(h_ptr); }
-
-#endif
-
-/* Interface to AVL tree generic package instantiation. */
-
-#define AVL_UNIQUE(BASE) U(avl_ ## BASE)
-
-#define AVL_HANDLE ptr_record *
-
-#define AVL_KEY U(size_bau)
-
-#define AVL_MAX_DEPTH 64
-
-#include "cavl_if.h"
-
-#endif  // VPX_MEM_MEMORY_MANAGER_INCLUDE_HMM_INTRNL_H_