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|Fri Mar 24 12:33:27 1995 Mark Lakata (lakata@nsdssp.lbl.gov)

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|
|       * NSZone.c : added #define WORDSIZE sizeof(double)
|       (NSZoneMalloc): returns machine word aligned pointers.  Actually,
|       the word size is assumed to be equal to or smaller than
|       sizeof(double).


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@207 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
Andrew McCallum 1995-03-24 22:00:25 +00:00
parent c10655a5bc
commit 61fd35c2f0
1 changed files with 20 additions and 11 deletions
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31
Source/NSZone.c
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@ -83,6 +83,8 @@
#define ALLOCATED 1
#define ZONELINK 2
#define WORDSIZE (sizeof(double))
typedef struct _chunkdesc
{
void *base;
@ -291,25 +293,32 @@ void NSMergeZone(NSZone *zonep)
void *NSZoneMalloc(NSZone *zonep, size_t size)
{
int i,pages;
size_t newsize,oddsize;
void *ptr;
chunkdesc temp,*chunk;
NSZone *newzone;
if (zonep == NS_NOZONE) return (*objc_malloc) (size);
/* round size up to the nearest word, so that all chunks are word aligned */
oddsize = (size % WORDSIZE);
newsize = size - oddsize + (oddsize?WORDSIZE:0);
/* if the chunks in this zone can be freed, then we have to scan the whole
zone for chunks that have been deallocated for recycling. This requires
extra time, so it is not as fast as !canFree */
if (zonep->canFree) {
for (i=0;i<zonep->heap.Count;i++) {
chunk = &(((chunkdesc *)zonep->heap.LList)[i]);
if (chunk->type == UNUSED) {
if (size <= chunk->size) {
if (newsize <= chunk->size) {
ptr = chunk->base;
chunk->type = ALLOCATED;
if (size < chunk->size) {
temp.base = chunk->base+size;
temp.size = chunk->size-size;
if (newsize < chunk->size) {
temp.base = chunk->base+newsize;
temp.size = chunk->size-newsize;
temp.type = UNUSED;
addtolist(&temp,&zonep->heap,i+1);
chunk->size = size;
chunk->size = newsize;
}
return ptr;
}
@ -318,7 +327,7 @@ void *NSZoneMalloc(NSZone *zonep, size_t size)
#ifdef DEBUG
printf("following link ...\n");
#endif
return (NSZoneMalloc((NSZone *)(chunk->base),size));
return (NSZoneMalloc((NSZone *)(chunk->base),newsize));
}
}
@ -326,9 +335,9 @@ void *NSZoneMalloc(NSZone *zonep, size_t size)
}
else {
chunk = &(((chunkdesc *)zonep->heap.LList)[0]);
if (chunk->size > size) {
if (chunk->size > newsize) {
ptr = chunk->base;
chunk->size -=size;
chunk->size -=newsize;
return ptr;
}
if (zonep->heap.Count == 2) {
@ -337,7 +346,7 @@ void *NSZoneMalloc(NSZone *zonep, size_t size)
#ifdef DEBUG
printf("following link ...\n");
#endif
return (NSZoneMalloc((NSZone *)(chunk->base),size));
return (NSZoneMalloc((NSZone *)(chunk->base),newsize));
}
}
}
@ -345,7 +354,7 @@ void *NSZoneMalloc(NSZone *zonep, size_t size)
#ifdef DEBUG
printf("*** no more memory in zone, creating link to new zone\n");
#endif
pages = size/(zonep->granularity)+1;
pages = newsize/(zonep->granularity)+1;
newzone = NSCreateZone(pages*(zonep->granularity),
zonep->granularity,zonep->canFree);
if (newzone == NS_NOZONE) {
@ -359,7 +368,7 @@ void *NSZoneMalloc(NSZone *zonep, size_t size)
temp.size = 0;
temp.type = ZONELINK;
addtolist(&temp,&zonep->heap,zonep->heap.Count);
return (NSZoneMalloc(newzone,size));
return (NSZoneMalloc(newzone,newsize));
}