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first draft of the new allocator with transactions support

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This commit is contained in:
Krasimir Angelov
2022-05-20 13:55:45 +02:00
parent 546dc01b5d
commit 5594679a83
24 changed files with 1582 additions and 2372 deletions
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76
src/runtime/c/pgf/db.h
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@@ -8,6 +8,7 @@ class PgfDB;
extern PGF_INTERNAL_DECL __thread unsigned char* current_base __attribute__((tls_model("initial-exec")));
extern PGF_INTERNAL_DECL __thread PgfDB* current_db __attribute__((tls_model("initial-exec")));
struct block_descr;
struct malloc_state;
template<class A> class PGF_INTERNAL_DECL ref {
@@ -37,10 +38,9 @@ public:
object as_object() const { return offset; }
static
object tagged(ref<A> ref) {
object tagged() {
assert(A::tag < MALLOC_ALIGN_MASK + 1);
return (ref.offset | A::tag);
return (offset | A::tag);
}
static
@@ -56,16 +56,28 @@ public:
enum DB_scope_mode {READER_SCOPE, WRITER_SCOPE};
typedef size_t txn_t;
class PgfDB {
private:
int fd;
const char *filepath;
malloc_state* ms;
size_t mmap_size;
unsigned char* base;
// The following four fields are normally equal to
// the corresponding fields in the malloc_state.
// The exception is when a transaction is active.
object top;
object free_blocks;
object free_descriptors[2];
size_t mmap_size;
size_t page_size;
#ifndef _WIN32
pthread_rwlock_t *rwlock;
pid_t pid;
#else
DWORD pid;
HANDLE hMap;
HANDLE hRWEvent;
#endif
@@ -80,48 +92,60 @@ public:
PGF_INTERNAL_DECL PgfDB(const char* filepath, int flags, int mode);
PGF_INTERNAL_DECL ~PgfDB();
PGF_INTERNAL_DECL static txn_t get_txn_id();
template<class A>
static ref<A> malloc(size_t extra_bytes=0) {
return current_db->malloc_internal(sizeof(A)+extra_bytes);
}
template<class A>
static ref<A> realloc(ref<A> r, size_t extra_bytes) {
return current_db->realloc_internal(r.as_object(), sizeof(A)+extra_bytes);
static ref<A> realloc(ref<A> r, size_t old_extra_bytes, size_t new_extra_bytes) {
return current_db->realloc_internal(r.as_object(), sizeof(A)+old_extra_bytes, sizeof(A)+new_extra_bytes);
}
template<class A>
static void free(ref<A> o) {
current_db->free_internal(o.as_object());
static void free(ref<A> o, size_t extra_bytes=0) {
current_db->free_internal(o.as_object(), sizeof(A)+extra_bytes);
}
PGF_INTERNAL_DECL void cleanup_revisions();
static PGF_INTERNAL_DECL ref<PgfPGF> get_revision(PgfText *name);
static PGF_INTERNAL_DECL void set_revision(ref<PgfPGF> pgf);
PGF_INTERNAL_DECL object get_active_revision();
PGF_INTERNAL_DECL void set_active_revision(object o);
PGF_INTERNAL_DECL void register_revision(object o);
PGF_INTERNAL_DECL void unregister_revision(object o);
static PGF_INTERNAL_DECL ref<PgfPGF> revision2pgf(PgfRevision revision);
static PGF_INTERNAL_DECL bool is_persistant_revision(ref<PgfPGF> pgf);
static PGF_INTERNAL_DECL void link_transient_revision(ref<PgfPGF> pgf);
static PGF_INTERNAL_DECL void unlink_transient_revision(ref<PgfPGF> pgf);
PGF_INTERNAL_DECL ref<PgfPGF> revision2pgf(PgfRevision revision);
PGF_INTERNAL_DECL ref<PgfConcr> revision2concr(PgfConcrRevision revision);
static PGF_INTERNAL_DECL ref<PgfConcr> revision2concr(PgfConcrRevision revision);
static PGF_INTERNAL_DECL bool is_persistant_revision(ref<PgfConcr> concr);
static PGF_INTERNAL_DECL void link_transient_revision(ref<PgfConcr> concr);
static PGF_INTERNAL_DECL void unlink_transient_revision(ref<PgfConcr> concr);
static PGF_INTERNAL_DECL void sync();
PGF_INTERNAL_DECL void start_transaction();
PGF_INTERNAL_DECL void commit();
PGF_INTERNAL_DECL void rollback();
private:
PGF_INTERNAL_DECL void init_state(size_t size);
PGF_INTERNAL_DECL int init_state();
PGF_INTERNAL_DECL size_t block_descr_size(object map);
PGF_INTERNAL_DECL object new_block_descr(object o, size_t size);
PGF_INTERNAL_DECL object upd_block_descr(object map, object left, object right);
PGF_INTERNAL_DECL object balanceL_block_descriptor(object map);
PGF_INTERNAL_DECL object balanceR_block_descriptor(object map);
PGF_INTERNAL_DECL object pop_first_block_descriptor(object map, object *res);
PGF_INTERNAL_DECL object pop_last_block_descriptor(object map, object *res);
PGF_INTERNAL_DECL object insert_block_descriptor(object map, object o, size_t size);
PGF_INTERNAL_DECL object delete_block_descriptor(object map, size_t *psize, object *po);
#ifdef DEBUG_MEMORY_ALLOCATOR
PGF_INTERNAL_DECL void dump_free_blocks(object map);
#endif
PGF_INTERNAL_DECL object malloc_internal(size_t bytes);
PGF_INTERNAL_DECL object realloc_internal(object oldo, size_t bytes);
PGF_INTERNAL_DECL void free_internal(object o);
PGF_INTERNAL_DECL object realloc_internal(object oldo, size_t old_bytes, size_t new_bytes);
PGF_INTERNAL_DECL void register_process();
PGF_INTERNAL_DECL void unregister_process();
PGF_INTERNAL_DECL void free_internal(object o, size_t bytes);
PGF_INTERNAL_DECL void lock(DB_scope_mode m);
PGF_INTERNAL_DECL void unlock();