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-rw-r--r--gc/nursery.c175
1 files changed, 0 insertions, 175 deletions
diff --git a/gc/nursery.c b/gc/nursery.c
deleted file mode 100644
index 8bbb101..0000000
--- a/gc/nursery.c
+++ /dev/null
@@ -1,175 +0,0 @@
-/*
- * Copyright (c) 1999 by Silicon Graphics. All rights reserved.
- *
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
- *
- * Permission is hereby granted to use or copy this program
- * for any purpose, provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
- */
-
-
-??? This implementation is incomplete. If you are trying to
-??? compile this you are doing something wrong.
-
-#include "nursery.h"
-
-struct copy_obj {
- ptr_t forward; /* Forwarding link for copied objects. */
- GC_copy_descriptor descr; /* Object descriptor */
- word data[1];
-}
-
-ptr_t GC_nursery_start; /* Start of nursery area. */
- /* Must be NURSERY_BLOCK_SIZE */
- /* aligned. */
-ptr_t GC_nursery_end; /* End of nursery area. */
-unsigned char * GC_nursery_map;
- /* GC_nursery_map[i] != 0 if an object */
- /* starts on the ith 64-bit "word" of */
- /* nursery. This simple structure has */
- /* the advantage that */
- /* allocation is cheap. Lookup is */
- /* cheap for pointers to the head of */
- /* an object, which should be the */
- /* usual case. */
-# define NURSERY_MAP_NOT_START 0 /* Not start of object. */
-# define NURSERY_MAP_START 1 /* Start of object. */
-# define NURSERY_MAP_PINNED 2 /* Start of pinned obj. */
-
-# ifdef ALIGN_DOUBLE
-# define NURSERY_WORD_SIZE (2 * sizeof(word))
-# else
-# define NURSERY_WORD_SIZE sizeof(word)
-# endif
-
-# define NURSERY_BLOCK_SIZE (HBLKSIZE/2)
- /* HBLKSIZE must be a multiple of NURSERY_BLOCK_SIZE */
-# define NURSERY_SIZE (1024 * NURSERY_BLOCK_SIZE)
-
-size_t GC_nursery_size = NURSERY_SIZE;
- /* Must be multiple of NURSERY_BLOCK_SIZE */
-
-size_t GC_nursery_blocks; /* Number of blocks in the nursery. */
-
-unsigned GC_next_nursery_block; /* index of next block we will attempt */
- /* allocate from during this cycle. */
- /* If it is pinned, we won't actually */
- /* use it. */
-
-unsigned short *GC_pinned; /* Number of pinned objects in ith */
- /* nursery block. */
- /* GC_pinned[i] != 0 if the ith nursery */
- /* block is pinned, and thus not used */
- /* for allocation. */
-
-GC_copy_alloc_state global_alloc_state = (ptr_t)(-1); /* will overflow. */
-
-/* Should be called with allocator lock held. */
-GC_nursery_init() {
- GC_nursery_start = GET_MEM(GC_nursery_size);
- GC_nursery_end = GC_nursery_start + GC_nursery_size;
- GC_next_nursery_block = 0;
- if (GC_nursery_start < GC_least_plausible_heap_addr) {
- GC_least_plausible_heap_addr = GC_nursery_start;
- }
- if (GC_nursery_end > GC_greatest_plausible_heap_addr) {
- GC_greatest_plausible_heap_addr = GC_nursery_end;
- }
- if (GC_nursery_start & (NURSERY_BLOCK_SIZE-1)) {
- GC_err_printf1("Nursery area is misaligned!!");
- /* This should be impossible, since GET_MEM returns HBLKSIZE */
- /* aligned chunks, and that should be a multiple of */
- /* NURSERY_BLOCK_SIZE */
- ABORT("misaligned nursery");
- }
- GC_nursery_map = GET_MEM(GC_nursery_size/NURSERY_WORD_SIZE);
- /* Map is cleared a block at a time when we allocate from the block. */
- /* BZERO(GC_nursery_map, GC_nursery_size/NURSERY_WORD_SIZE); */
- GC_nursery_blocks = GC_nursery_size/NURSERY_BLOCK_SIZE;
- GC_pinned = GC_scratch_alloc(GC_nursery_blocks * sizeof(unsigned short));
- BZERO(GC_pinned, GC_nursery_blocks);
-}
-
-/* Pin all nursery objects referenced from mark stack. */
-void GC_pin_mark_stack_objects(void) {
- for each possible pointer current in a mark stack object
- if (current >= GC_nursery_start && current < GC_nursery_end) {
- unsigned offset = current - GC_nursery_start;
- unsigned word_offset = BYTES_TO_WORDS(offset);
- unsigned blockno = (current - GC_nursery_start)/NURSERY_BLOCK_SIZE;
- while (GC_nursery_map[word_offset] == NURSERY_MAP_NOT_START) {
- --word_offset;
- }
- if (GC_nursery_map[word_offset] != NURSERY_MAP_PINNED) {
- GC_nursery_map[word_offset] = NURSERY_MAP_PINNED;
- ++GC_pinned[blockno];
- ??Push object at GC_nursery_start + WORDS_TO_BYTES(word_offset)
- ??onto stack.
- }
- }
- }
-}
-
-/* Caller holds allocation lock. */
-void GC_collect_nursery(void) {
- int i;
- ptr_t scan_ptr = 0;
- ?? old_mark_stack_top;
- STOP_WORLD;
- for (i = 0; i < GC_nursery_blocks; ++i) GC_pinned[i] = 0;
- GC_push_all_roots();
- old_mark_stack_top = GC_mark_stack_top();
- GC_pin_mark_stack_objects();
- START_WORLD;
-}
-
-/* Initialize an allocation state so that it can be used for */
-/* allocation. This implicitly reserves a small section of the */
-/* nursery for use with his allocator. */
-void GC_init_copy_alloc_state(GC_copy_alloc_state *)
- unsigned next_block;
- ptr_t block_addr;
- LOCK();
- next_block = GC_next_nursery_block;
- while(is_pinned[next_block] && next_block < GC_nursery_blocks) {
- ++next_block;
- }
- if (next_block < GC_nursery_blocks) {
- block_addr = GC_nursery_start + NURSERY_BLOCK_SIZE * next_block;
- GC_next_nursery_block = next_block + 1;
- BZERO(GC_nursery_map + next_block *
- (NURSERY_BLOCK_SIZE/NURSERY_WORD_SIZE),
- NURSERY_BLOCK_SIZE/NURSERY_WORD_SIZE);
- *GC_copy_alloc_state = block_addr;
- UNLOCK();
- } else {
- GC_collect_nursery();
- GC_next_nursery_block = 0;
- UNLOCK();
- get_new_block(s);
- }
-}
-
-GC_PTR GC_copying_malloc2(GC_copy_descriptor *d, GC_copy_alloc_state *s) {
- size_t sz = GC_SIZE_FROM_DESCRIPTOR(d);
- ptrdiff_t offset;
- ptr_t result = *s;
- ptr_t new = result + sz;
- if (new & COPY_BLOCK_MASK <= result & COPY_BLOCK_MASK> {
- GC_init_copy_alloc_state(s);
- result = *s;
- new = result + sz;
- GC_ASSERT(new & COPY_BLOCK_MASK > result & COPY_BLOCK_MASK>
- }
- (struct copy_obj *)result -> descr = d;
- (struct copy_obj *)result -> forward = 0;
- offset = (result - GC_nursery_start)/NURSERY_WORD_SIZE;
- GC_nursery_map[offset] = NURSERY_MAP_NOT_START;
-}
-
-GC_PTR GC_copying_malloc(GC_copy_descriptor *d) {
-}
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