/* -----------------------------------------------------------------------------
- * $Id: Stable.c,v 1.24 2003/01/28 17:05:43 simonmar Exp $
+ * $Id: Stable.c,v 1.28 2004/08/13 13:10:45 simonmar Exp $
*
* (c) The GHC Team, 1998-2002
*
#include "PosixSource.h"
#include "Rts.h"
#include "Hash.h"
-#include "StablePriv.h"
#include "RtsUtils.h"
#include "Storage.h"
#include "RtsAPI.h"
There may be additional functions on the C side to allow evaluation,
application, etc of a stable pointer.
- When Haskell calls C, it normally just passes over primitive integers,
- floats, bools, strings, etc. This doesn't cause any problems at all
- for garbage collection because the act of passing them makes a copy
- from the heap, stack or wherever they are onto the C-world stack.
- However, if we were to pass a heap object such as a (Haskell) @String@
- and a garbage collection occured before we finished using it, we'd run
- into problems since the heap object might have been moved or even
- deleted.
-
- So, if a C call is able to cause a garbage collection or we want to
- store a pointer to a heap object between C calls, we must be careful
- when passing heap objects. Our solution is to keep a table of all
- objects we've given to the C-world and to make sure that the garbage
- collector collects these objects --- updating the table as required to
- make sure we can still find the object.
*/
snEntry *stable_ptr_table = NULL;
#define INIT_SPT_SIZE 64
-static inline void
+STATIC_INLINE void
initFreeList(snEntry *table, nat n, snEntry *free)
{
snEntry *p;
}
}
-static inline void
+STATIC_INLINE void
freeStableName(snEntry *sn)
{
ASSERT(sn->sn_obj == NULL);
if (SPT_size == 0) {
// 1st time
SPT_size = INIT_SPT_SIZE;
- stable_ptr_table = stgMallocWords(SPT_size * sizeof(snEntry),
- "initStablePtrTable");
+ stable_ptr_table = stgMallocBytes(SPT_size * sizeof(snEntry),
+ "enlargeStablePtrTable");
/* we don't use index 0 in the stable name table, because that
* would conflict with the hash table lookup operations which
// 2nd and subsequent times
SPT_size *= 2;
stable_ptr_table =
- stgReallocWords(stable_ptr_table, SPT_size * sizeof(snEntry),
+ stgReallocBytes(stable_ptr_table,
+ SPT_size * sizeof(snEntry),
"enlargeStablePtrTable");
-
+
initFreeList(stable_ptr_table + old_SPT_size, old_SPT_size, NULL);
}
}