short MEM_freeN(void *vmemh) /* anders compileertie niet meer */
{
short error = 0;
MemTail *memt;
MemHead *memh= vmemh;
const char *name;
if (memh == NULL){
MemorY_ErroR("free","attempt to free NULL pointer");
/* print_error(err_stream, "%d\n", (memh+4000)->tag1); */
return(-1);
}
if(sizeof(intptr_t)==8) {
if (((intptr_t) memh) & 0x7) {
MemorY_ErroR("free","attempt to free illegal pointer");
return(-1);
}
}
else {
if (((intptr_t) memh) & 0x3) {
MemorY_ErroR("free","attempt to free illegal pointer");
return(-1);
}
}
memh--;
if(memh->tag1 == MEMFREE && memh->tag2 == MEMFREE) {
MemorY_ErroR(memh->name,"double free");
return(-1);
}
mem_lock_thread();
if ((memh->tag1 == MEMTAG1) && (memh->tag2 == MEMTAG2) && ((memh->len & 0x3) == 0)) {
memt = (MemTail *)(((char *) memh) + sizeof(MemHead) + memh->len);
if (memt->tag3 == MEMTAG3){
memh->tag1 = MEMFREE;
memh->tag2 = MEMFREE;
memt->tag3 = MEMFREE;
/* after tags !!! */
rem_memblock(memh);
mem_unlock_thread();
return(0);
}
error = 2;
MemorY_ErroR(memh->name,"end corrupt");
name = check_memlist(memh);
if (name != NULL){
if (name != memh->name) MemorY_ErroR(name,"is also corrupt");
}
} else{
error = -1;
name = check_memlist(memh);
if (name == NULL)
MemorY_ErroR("free","pointer not in memlist");
else
MemorY_ErroR(name,"error in header");
}
totblock--;
/* here a DUMP should happen */
mem_unlock_thread();
return(error);
}
static const char *check_memlist(MemHead *memh)
{
MemHead *forw,*back,*forwok,*backok;
const char *name;
forw = membase->first;
if (forw) forw = MEMNEXT(forw);
forwok = NULL;
while(forw){
if (forw->tag1 != MEMTAG1 || forw->tag2 != MEMTAG2) break;
forwok = forw;
if (forw->next) forw = MEMNEXT(forw->next);
else forw = NULL;
}
back = (MemHead *) membase->last;
if (back) back = MEMNEXT(back);
backok = NULL;
while(back){
if (back->tag1 != MEMTAG1 || back->tag2 != MEMTAG2) break;
backok = back;
if (back->prev) back = MEMNEXT(back->prev);
else back = NULL;
}
if (forw != back) return ("MORE THAN 1 MEMORYBLOCK CORRUPT");
if (forw == NULL && back == NULL){
/* geen foute headers gevonden dan maar op zoek naar memblock*/
forw = membase->first;
if (forw) forw = MEMNEXT(forw);
forwok = NULL;
while(forw){
if (forw == memh) break;
if (forw->tag1 != MEMTAG1 || forw->tag2 != MEMTAG2) break;
forwok = forw;
if (forw->next) forw = MEMNEXT(forw->next);
else forw = NULL;
}
if (forw == NULL) return NULL;
back = (MemHead *) membase->last;
if (back) back = MEMNEXT(back);
backok = NULL;
while(back){
if (back == memh) break;
if (back->tag1 != MEMTAG1 || back->tag2 != MEMTAG2) break;
backok = back;
if (back->prev) back = MEMNEXT(back->prev);
else back = NULL;
}
}
if (forwok) name = forwok->nextname;
else name = "No name found";
if (forw == memh){
/* voor alle zekerheid wordt dit block maar uit de lijst gehaald */
if (forwok){
if (backok){
forwok->next = (MemHead *)&backok->next;
backok->prev = (MemHead *)&forwok->next;
forwok->nextname = backok->name;
} else{
forwok->next = NULL;
membase->last = (struct localLink *) &forwok->next;
/* membase->last = (struct Link *) &forwok->next; */
}
} else{
if (backok){
backok->prev = NULL;
membase->first = &backok->next;
} else{
membase->first = membase->last = NULL;
}
}
} else{
MemorY_ErroR(name,"Additional error in header");
return("Additional error in header");
}
return(name);
}
short MEM_freeN(void *vmemh) /* anders compileertie niet meer */
{
short error = 0;
MemTail *memt;
MemHead *memh= (MemHead*)vmemh; // (MemHead*) Added by Swanny 19/05/05
char *name;
if (memh == 0){
MemorY_ErroR("free","attempt to free NULL pointer");
/* print_error(err_stream, "%d\n", (memh+4000)->tag1); */
return(-1);
}
if(sizeof(long)==8) {
if (((long) memh) & 0x7) {
MemorY_ErroR("free","attempt to free illegal pointer");
return(-1);
}
}
else {
if (((long) memh) & 0x3) {
MemorY_ErroR("free","attempt to free illegal pointer");
return(-1);
}
}
memh--;
if(memh->tag1 == MEMFREE && memh->tag2 == MEMFREE) {
MemorY_ErroR(memh->name,"double free");
return(-1);
}
if ((memh->tag1 == MEMTAG1) && (memh->tag2 == MEMTAG2) && ((memh->len & 0x3) == 0)) {
memt = (MemTail *)(((char *) memh) + sizeof(MemHead) + memh->len);
if (memt->tag3 == MEMTAG3){
memh->tag1 = MEMFREE;
memh->tag2 = MEMFREE;
memt->tag3 = MEMFREE;
/* na tags !!! */
rem_memblock(memh);
return(0);
}
error = 2;
MemorY_ErroR(memh->name,"end corrupt");
name = check_memlist(memh);
if (name != 0){
if (name != memh->name) MemorY_ErroR(name,"is also corrupt");
}
} else{
error = -1;
name = check_memlist(memh);
if (name == 0) MemorY_ErroR("free","pointer not in memlist");
else MemorY_ErroR(name,"error in header");
}
totblock--;
/* hier moet een DUMP plaatsvinden */
return(error);
}
