* double this size, and so on. Larger segments may be created if necessary
* to satisfy large requests.
*/
-#define DSA_INITIAL_SEGMENT_SIZE ((Size) (1 * 1024 * 1024))
+#define DSA_INITIAL_SEGMENT_SIZE ((size_t) (1 * 1024 * 1024))
/*
* How many segments to create before we double the segment size. If this is
#define DSA_OFFSET_BITMASK (((dsa_pointer) 1 << DSA_OFFSET_WIDTH) - 1)
/* The maximum size of a DSM segment. */
-#define DSA_MAX_SEGMENT_SIZE ((Size) 1 << DSA_OFFSET_WIDTH)
+#define DSA_MAX_SEGMENT_SIZE ((size_t) 1 << DSA_OFFSET_WIDTH)
/* Number of pages (see FPM_PAGE_SIZE) per regular superblock. */
#define DSA_PAGES_PER_SUPERBLOCK 16
#define DSA_EXTRACT_OFFSET(dp) ((dp) & DSA_OFFSET_BITMASK)
/* The type used for index segment indexes (zero based). */
-typedef Size dsa_segment_index;
+typedef size_t dsa_segment_index;
/* Sentinel value for dsa_segment_index indicating 'none' or 'end'. */
#define DSA_SEGMENT_INDEX_NONE (~(dsa_segment_index)0)
/* Sanity check magic value. */
uint32 magic;
/* Total number of pages in this segment (excluding metadata area). */
- Size usable_pages;
+ size_t usable_pages;
/* Total size of this segment in bytes. */
- Size size;
+ size_t size;
/*
* Index of the segment that precedes this one in the same segment bin, or
*/
dsa_segment_index next;
/* The index of the bin that contains this segment. */
- Size bin;
+ size_t bin;
/*
* A flag raised to indicate that this segment is being returned to the
dsa_pointer prevspan; /* Previous span. */
dsa_pointer nextspan; /* Next span. */
dsa_pointer start; /* Starting address. */
- Size npages; /* Length of span in pages. */
+ size_t npages; /* Length of span in pages. */
uint16 size_class; /* Size class. */
uint16 ninitialized; /* Maximum number of objects ever allocated. */
uint16 nallocatable; /* Number of objects currently allocatable. */
/* The object pools for each size class. */
dsa_area_pool pools[DSA_NUM_SIZE_CLASSES];
/* The total size of all active segments. */
- Size total_segment_size;
+ size_t total_segment_size;
/* The maximum total size of backing storage we are allowed. */
- Size max_total_segment_size;
+ size_t max_total_segment_size;
/* Highest used segment index in the history of this area. */
dsa_segment_index high_segment_index;
/* The reference count for this area. */
/* A flag indicating that this area has been pinned. */
bool pinned;
/* The number of times that segments have been freed. */
- Size freed_segment_counter;
+ size_t freed_segment_counter;
/* The LWLock tranche ID. */
int lwlock_tranche_id;
/* The general lock (protects everything except object pools). */
dsa_segment_index high_segment_index;
/* The last observed freed_segment_counter. */
- Size freed_segment_counter;
+ size_t freed_segment_counter;
};
#define DSA_SPAN_NOTHING_FREE ((uint16) -1)
(segment_map_ptr - &area->segment_maps[0])
static void init_span(dsa_area *area, dsa_pointer span_pointer,
- dsa_area_pool *pool, dsa_pointer start, Size npages,
+ dsa_area_pool *pool, dsa_pointer start, size_t npages,
uint16 size_class);
static bool transfer_first_span(dsa_area *area, dsa_area_pool *pool,
int fromclass, int toclass);
static void add_span_to_fullness_class(dsa_area *area, dsa_area_span *span,
dsa_pointer span_pointer, int fclass);
static void unlink_segment(dsa_area *area, dsa_segment_map *segment_map);
-static dsa_segment_map *get_best_segment(dsa_area *area, Size npages);
-static dsa_segment_map *make_new_segment(dsa_area *area, Size requested_pages);
+static dsa_segment_map *get_best_segment(dsa_area *area, size_t npages);
+static dsa_segment_map *make_new_segment(dsa_area *area, size_t requested_pages);
static dsa_area *create_internal(void *place, size_t size,
int tranche_id,
dsm_handle control_handle,
* flags.
*/
dsa_pointer
-dsa_allocate_extended(dsa_area *area, Size size, int flags)
+dsa_allocate_extended(dsa_area *area, size_t size, int flags)
{
uint16 size_class;
dsa_pointer start_pointer;
*/
if (size > dsa_size_classes[lengthof(dsa_size_classes) - 1])
{
- Size npages = fpm_size_to_pages(size);
- Size first_page;
+ size_t npages = fpm_size_to_pages(size);
+ size_t first_page;
dsa_pointer span_pointer;
dsa_area_pool *pool = &area->control->pools[DSA_SCLASS_SPAN_LARGE];
dsa_area_span *span;
char *superblock;
char *object;
- Size size;
+ size_t size;
int size_class;
/* Make sure we don't have a stale segment in the slot 'dp' refers to. */
dsa_get_address(dsa_area *area, dsa_pointer dp)
{
dsa_segment_index index;
- Size offset;
+ size_t offset;
/* Convert InvalidDsaPointer to NULL. */
if (!DsaPointerIsValid(dp))
* backends that have attached to them.
*/
void
-dsa_set_size_limit(dsa_area *area, Size limit)
+dsa_set_size_limit(dsa_area *area, size_t limit)
{
LWLockAcquire(DSA_AREA_LOCK(area), LW_EXCLUSIVE);
area->control->max_total_segment_size = limit;
void
dsa_dump(dsa_area *area)
{
- Size i,
+ size_t i,
j;
/*
* Return the smallest size that you can successfully provide to
* dsa_create_in_place.
*/
-Size
+size_t
dsa_minimum_size(void)
{
- Size size;
+ size_t size;
int pages = 0;
size = MAXALIGN(sizeof(dsa_area_control)) +
dsa_area_control *control;
dsa_area *area;
dsa_segment_map *segment_map;
- Size usable_pages;
- Size total_pages;
- Size metadata_bytes;
+ size_t usable_pages;
+ size_t total_pages;
+ size_t metadata_bytes;
int i;
/* Sanity check on the space we have to work in. */
control->segment_header.freed = false;
control->segment_header.size = DSA_INITIAL_SEGMENT_SIZE;
control->handle = control_handle;
- control->max_total_segment_size = (Size) -1;
+ control->max_total_segment_size = (size_t) -1;
control->total_segment_size = size;
memset(&control->segment_handles[0], 0,
sizeof(dsm_handle) * DSA_MAX_SEGMENTS);
static void
init_span(dsa_area *area,
dsa_pointer span_pointer,
- dsa_area_pool *pool, dsa_pointer start, Size npages,
+ dsa_area_pool *pool, dsa_pointer start, size_t npages,
uint16 size_class)
{
dsa_area_span *span = dsa_get_address(area, span_pointer);
- Size obsize = dsa_size_classes[size_class];
+ size_t obsize = dsa_size_classes[size_class];
/*
* The per-pool lock must be held because we manipulate the span list for
dsa_pointer block;
dsa_pointer result;
char *object;
- Size size;
+ size_t size;
/*
* Even though ensure_active_superblock can in turn call alloc_object if
{
dsa_pointer span_pointer;
dsa_pointer start_pointer;
- Size obsize = dsa_size_classes[size_class];
- Size nmax;
+ size_t obsize = dsa_size_classes[size_class];
+ size_t nmax;
int fclass;
- Size npages = 1;
- Size first_page;
- Size i;
+ size_t npages = 1;
+ size_t first_page;
+ size_t i;
dsa_segment_map *segment_map;
Assert(LWLockHeldByMe(DSA_SCLASS_LOCK(area, size_class)));
* pages map.
*/
static dsa_segment_map *
-get_best_segment(dsa_area *area, Size npages)
+get_best_segment(dsa_area *area, size_t npages)
{
- Size bin;
+ size_t bin;
Assert(LWLockHeldByMe(DSA_AREA_LOCK(area)));
check_for_freed_segments_locked(area);
* The minimum contiguous size that any segment in this bin should
* have. We'll re-bin if we see segments with fewer.
*/
- Size threshold = (Size) 1 << (bin - 1);
+ size_t threshold = (size_t) 1 << (bin - 1);
dsa_segment_index segment_index;
/* Search this bin for a segment with enough contiguous space. */
{
dsa_segment_map *segment_map;
dsa_segment_index next_segment_index;
- Size contiguous_pages;
+ size_t contiguous_pages;
segment_map = get_segment_by_index(area, segment_index);
next_segment_index = segment_map->header->next;
/* Re-bin it if it's no longer in the appropriate bin. */
if (contiguous_pages < threshold)
{
- Size new_bin;
+ size_t new_bin;
new_bin = contiguous_pages_to_segment_bin(contiguous_pages);
* segments would be exceeded.
*/
static dsa_segment_map *
-make_new_segment(dsa_area *area, Size requested_pages)
+make_new_segment(dsa_area *area, size_t requested_pages)
{
dsa_segment_index new_index;
- Size metadata_bytes;
- Size total_size;
- Size total_pages;
- Size usable_pages;
+ size_t metadata_bytes;
+ size_t total_size;
+ size_t total_pages;
+ size_t usable_pages;
dsa_segment_map *segment_map;
dsm_segment *segment;
* pages we can fit.
*/
total_size = DSA_INITIAL_SEGMENT_SIZE *
- ((Size) 1 << (new_index / DSA_NUM_SEGMENTS_AT_EACH_SIZE));
+ ((size_t) 1 << (new_index / DSA_NUM_SEGMENTS_AT_EACH_SIZE));
total_size = Min(total_size, DSA_MAX_SEGMENT_SIZE);
total_size = Min(total_size,
area->control->max_total_segment_size -
static void
check_for_freed_segments(dsa_area *area)
{
- Size freed_segment_counter;
+ size_t freed_segment_counter;
/*
* Any other process that has freed a segment has incremented
static void
check_for_freed_segments_locked(dsa_area *area)
{
- Size freed_segment_counter;
+ size_t freed_segment_counter;
int i;
Assert(LWLockHeldByMe(DSA_AREA_LOCK(area)));
typedef struct dsa_area dsa_area;
/*
- * If this system only uses a 32-bit value for Size, then use the 32-bit
+ * If this system only uses a 32-bit value for size_t, then use the 32-bit
* implementation of DSA. This limits the amount of DSA that can be created
* to something significantly less than the entire 4GB address space because
* the DSA pointer must encode both a segment identifier and an offset, but
extern void dsa_startup(void);
extern dsa_area *dsa_create(int tranche_id);
-extern dsa_area *dsa_create_in_place(void *place, Size size,
+extern dsa_area *dsa_create_in_place(void *place, size_t size,
int tranche_id, dsm_segment *segment);
extern dsa_area *dsa_attach(dsa_handle handle);
extern dsa_area *dsa_attach_in_place(void *place, dsm_segment *segment);
extern void dsa_detach(dsa_area *area);
extern void dsa_pin(dsa_area *area);
extern void dsa_unpin(dsa_area *area);
-extern void dsa_set_size_limit(dsa_area *area, Size limit);
-extern Size dsa_minimum_size(void);
+extern void dsa_set_size_limit(dsa_area *area, size_t limit);
+extern size_t dsa_minimum_size(void);
extern dsa_handle dsa_get_handle(dsa_area *area);
-extern dsa_pointer dsa_allocate_extended(dsa_area *area, Size size, int flags);
+extern dsa_pointer dsa_allocate_extended(dsa_area *area, size_t size, int flags);
extern void dsa_free(dsa_area *area, dsa_pointer dp);
extern void *dsa_get_address(dsa_area *area, dsa_pointer dp);
extern void dsa_trim(dsa_area *area);
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