lib/misc.c

   1 /********************************************************************
   2  *                                                                  *
   3  * THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE.  *
   4  * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
   5  * THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE.    *
   6  * PLEASE READ THESE TERMS DISTRIBUTING.                            *
   7  *                                                                  *
   8  * THE OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-2000             *
   9  * by Monty <monty@xiph.org> and The XIPHOPHORUS Company            *
  10  * http://www.xiph.org/                                             *
  11  *                                                                  *
  12  ********************************************************************/
  13
  14 #define HEAD_ALIGN 32
  15 #include <pthread.h>
  16 #include <stdlib.h>
  17 #include <stdio.h>
  18 #include "vorbis/codec.h"
  19 #define MISC_C
  20 #include "misc.h"
  21
  22 static pthread_mutex_t memlock=PTHREAD_MUTEX_INITIALIZER;
  23 void **pointers=NULL;
  24 long *insertlist=NULL; /* We can't embed this in the pointer list;
  25                           a pointer can have any value... */
  26 int ptop=0;
  27 int palloced=0;
  28 int pinsert=0;
  29
  30 typedef struct {
  31   char *file;
  32   long line;
  33   long ptr;
  34 } head;
  35
  36 static void *_insert(void *ptr,char *file,long line){
  37   ((head *)ptr)->file=file;
  38   ((head *)ptr)->line=line;
  39   ((head *)ptr)->ptr=pinsert;
  40
  41   pthread_mutex_lock(&memlock);
  42   if(pinsert>=palloced){
  43     palloced+=64;
  44     if(pointers){
  45       pointers=(void **)realloc(pointers,sizeof(void **)*palloced);
  46       insertlist=(long *)realloc(insertlist,sizeof(long *)*palloced);
  47     }else{
  48       pointers=(void **)malloc(sizeof(void **)*palloced);
  49       insertlist=(long *)malloc(sizeof(long *)*palloced);
  50     }
  51   }
  52
  53   pointers[pinsert]=ptr;
  54
  55   if(pinsert==ptop)
  56     pinsert=++ptop;
  57   else
  58     pinsert=insertlist[pinsert];
  59
  60   pthread_mutex_unlock(&memlock);
  61   return(ptr+HEAD_ALIGN);
  62 }
  63
  64 static void _ripremove(void *ptr){
  65   int insert;
  66   pthread_mutex_lock(&memlock);
  67   insert=((head *)ptr)->ptr;
  68   insertlist[insert]=pinsert;
  69   pinsert=insert;
  70   pointers[insert]=NULL;
  71   pthread_mutex_unlock(&memlock);
  72 }
  73
  74 void _VDBG_dump(void){
  75   int i;
  76   pthread_mutex_lock(&memlock);
  77   for(i=0;i<ptop;i++){
  78     head *ptr=pointers[i];
  79     if(ptr)
  80       fprintf(stderr,"unfreed bytes from %s:%ld\n",
  81               ptr->file,ptr->line);
  82   }
  83
  84   pthread_mutex_unlock(&memlock);
  85 }
  86
  87 extern void *_VDBG_malloc(void *ptr,long bytes,char *file,long line){
  88   bytes+=HEAD_ALIGN;
  89   if(ptr){
  90     ptr-=HEAD_ALIGN;
  91     _ripremove(ptr);
  92     ptr=realloc(ptr,bytes);
  93   }else{
  94     ptr=malloc(bytes);
  95     memset(ptr,0,bytes);
  96   }
  97   return _insert(ptr,file,line);
  98 }
  99
 100 extern void _VDBG_free(void *ptr,char *file,long line){
 101   if(ptr){
 102     ptr-=HEAD_ALIGN;
 103     _ripremove(ptr);
 104     free(ptr);
 105   }
 106 }
 107