GitHub/gf-core
1
0
Fork 1
mirror of https://github.com/GrammaticalFramework/gf-core.git synced 2026-05-08 02:32:50 -06:00
Code Issues Packages Projects Releases Wiki Activity

added support for branches and explicit transaction commit

Browse Source
This commit is contained in:
krangelov
2021-09-08 14:09:23 +02:00
parent 2e846cdf59
commit bcc33af36b
9 changed files with 233 additions and 91 deletions
Download Patch File Download Diff File Expand all files Collapse all files

64
src/runtime/c/pgf/db.cxx
View File

@@ -250,7 +250,7 @@ typedef struct mchunk mbin;
*/
#define FASTBIN_CONSOLIDATION_THRESHOLD (65536UL)
struct malloc_state
struct PGF_INTERNAL_DECL malloc_state
{
/* Set if the fastbin chunks contain recently inserted free blocks. */
bool have_fastchunks;
@@ -264,8 +264,14 @@ struct malloc_state
object bins[NBINS * 2 - 2];
/* Bitmap of bins */
unsigned int binmap[BINMAPSIZE];
/* Reference to the root object */
object root_offset;
/* The namespace of all persistant grammar revisions */
Namespace<PgfPGF> revisions;
/* A reference to the first transient revision in
* a double-linked list.
*/
ref<PgfPGF> transient_revisions;
};
PGF_INTERNAL
@@ -346,15 +352,17 @@ void PgfDB::sync()
}
PGF_INTERNAL
object PgfDB::get_root_internal()
ref<PgfPGF> PgfDB::get_revision(PgfText *name)
{
return ms->root_offset;
return namespace_lookup(current_db->ms->revisions, name);
}
PGF_INTERNAL
void PgfDB::set_root_internal(object root_offset)
void PgfDB::set_revision(ref<PgfPGF> pgf)
{
ms->root_offset = root_offset;
Namespace<PgfPGF> nmsp = namespace_insert(current_db->ms->revisions, pgf);
namespace_release(current_db->ms->revisions);
current_db->ms->revisions = nmsp;
}
PGF_INTERNAL
@@ -383,7 +391,8 @@ void PgfDB::init_state(size_t size)
memset(ms->binmap, 0, sizeof(ms->binmap));
ms->root_offset = 0;
ms->revisions = 0;
ms->transient_revisions = 0;
}
/* Take a chunk off a bin list. */
@@ -958,12 +967,41 @@ void PgfDB::free_internal(object o)
}
}
bool PgfDB::is_valid_object(object o, size_t bytes)
PGF_INTERNAL
ref<PgfPGF> PgfDB::revision2pgf(PgfRevision revision)
{
if (o <= sizeof(*ms) || o >= ms->top)
return false;
mchunk *chunk = mem2chunk(ptr(ms,o));
return (chunksize(chunk) == request2size(bytes));
if (revision <= sizeof(*current_db->ms) || revision >= current_db->ms->top)
throw pgf_error("Invalid revision");
mchunk *chunk = mem2chunk(ptr(current_db->ms,revision));
if (chunksize(chunk) < sizeof(PgfPGF))
throw pgf_error("Invalid revision");
ref<PgfPGF> pgf = revision;
if (chunksize(chunk) != request2size(sizeof(PgfPGF)+pgf->name.size+1))
throw pgf_error("Invalid revision");
return pgf;
}
PGF_INTERNAL
void PgfDB::link_transient_revision(ref<PgfPGF> pgf)
{
pgf->next = current_db->ms->transient_revisions;
if (current_db->ms->transient_revisions == 0)
current_db->ms->transient_revisions->prev = pgf;
current_db->ms->transient_revisions = pgf;
}
PGF_INTERNAL
void PgfDB::unlink_transient_revision(ref<PgfPGF> pgf)
{
if (pgf->next != 0)
pgf->next->prev = pgf->prev;
if (pgf->prev != 0)
pgf->prev->next = pgf->next;
else
current_db->ms->transient_revisions = pgf->next;
}
DB_scope::DB_scope(PgfDB *db, DB_scope_mode tp)