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clean up everything after revision is not needed anymore.

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This commit is contained in:
krangelov
2021-09-11 16:33:22 +02:00
parent 7f0eb34864
commit ae0a6aa6b6
11 changed files with 455 additions and 116 deletions
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44
src/runtime/c/pgf/pgf.cxx
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@@ -116,9 +116,11 @@ PgfDB *pgf_read_ngf(const char *fpath,
{
DB_scope scope(db, WRITER_SCOPE);
if (PgfDB::get_revision(&master) == 0) {
ref<PgfPGF> pgf = PgfDB::get_revision(&master);
if (pgf == 0) {
is_new = true;
ref<PgfPGF> pgf = PgfDB::malloc<PgfPGF>(master.size+1);
pgf = PgfDB::malloc<PgfPGF>(master.size+1);
pgf->ref_count = 1;
pgf->major_version = 2;
pgf->minor_version = 0;
pgf->gflags = 0;
@@ -131,10 +133,10 @@ PgfDB *pgf_read_ngf(const char *fpath,
pgf->next = 0;
memcpy(&pgf->name, &master, sizeof(PgfText)+master.size+1);
PgfDB::set_revision(pgf);
*revision = pgf.as_object();
} else {
*revision = PgfDB::get_revision(&master).as_object();
Node<PgfPGF>::add_value_ref(pgf);
}
*revision = pgf.as_object();
}
return db;
@@ -159,15 +161,20 @@ PGF_API_DECL
void pgf_free_revision(PgfDB *db, PgfRevision revision)
{
try {
DB_scope scope(db, READER_SCOPE);
DB_scope scope(db, WRITER_SCOPE);
ref<PgfPGF> pgf = PgfDB::revision2pgf(revision);
if (PgfDB::unlink_transient_revision(pgf)) {
namespace_release(pgf->gflags);
PgfDB::free(pgf->abstract.name);
namespace_release(pgf->abstract.aflags);
namespace_release(pgf->abstract.funs);
namespace_release(pgf->abstract.cats);
if (pgf->ref_count == 1 && PgfDB::is_persistant_revision(pgf)) {
// Someone is trying to release the last reference count
// to a persistant revision. Mostly likely this is an
// error in the reference counting for one of the clients.
// The best that we can do is to ignore the request.
return;
}
if (!(--pgf->ref_count)) {
PgfDB::unlink_transient_revision(pgf);
PgfPGF::release(pgf);
PgfDB::free(pgf);
}
} catch (std::runtime_error& e) {
@@ -461,26 +468,27 @@ PgfRevision pgf_clone_revision(PgfDB *db, PgfRevision revision,
(name == NULL) ? pgf->name.size : name->size;
ref<PgfPGF> new_pgf = PgfDB::malloc<PgfPGF>(name_size+1);
new_pgf->ref_count = 1;
new_pgf->major_version = pgf->major_version;
new_pgf->minor_version = pgf->minor_version;
new_pgf->gflags = pgf->gflags;
if (pgf->gflags != 0)
pgf->gflags->ref_count++;
Node<PgfFlag>::add_node_ref(pgf->gflags);
new_pgf->abstract.name = textdup_db(&(*pgf->abstract.name));
new_pgf->abstract.aflags = pgf->abstract.aflags;
if (pgf->abstract.aflags != 0)
pgf->abstract.aflags->ref_count++;
Node<PgfFlag>::add_node_ref(pgf->abstract.aflags);
new_pgf->abstract.funs = pgf->abstract.funs;
if (pgf->abstract.funs != 0)
pgf->abstract.funs->ref_count++;
Node<PgfAbsFun>::add_node_ref(pgf->abstract.funs);
new_pgf->abstract.cats = pgf->abstract.cats;
if (pgf->abstract.cats != 0)
pgf->abstract.cats->ref_count++;
Node<PgfAbsCat>::add_node_ref(pgf->abstract.cats);
new_pgf->prev = 0;
new_pgf->next = 0;
@@ -519,7 +527,9 @@ PgfRevision pgf_checkout_revision(PgfDB *db, PgfText *name,
{
PGF_API_BEGIN {
DB_scope scope(db, WRITER_SCOPE);
return PgfDB::get_revision(name).as_object();
ref<PgfPGF> pgf = PgfDB::get_revision(name);
Node<PgfPGF>::add_value_ref(pgf);
return pgf.as_object();
} PGF_API_END
return 0;
@@ -539,6 +549,7 @@ void pgf_create_function(PgfDB *db, PgfRevision revision,
ref<PgfPGF> pgf = PgfDB::revision2pgf(revision);
ref<PgfAbsFun> absfun = PgfDB::malloc<PgfAbsFun>(name->size+1);
absfun->ref_count = 1;
absfun->type = m->match_type(&u, ty);
absfun->arity = 0;
absfun->defns = 0;
@@ -586,6 +597,7 @@ void pgf_create_category(PgfDB *db, PgfRevision revision,
ref<PgfPGF> pgf = PgfDB::revision2pgf(revision);
ref<PgfAbsCat> abscat = PgfDB::malloc<PgfAbsCat>(name->size+1);
abscat->ref_count = 1;
abscat->context = vector_new<PgfHypo>(n_hypos);
abscat->prob = prob;
memcpy(&abscat->name, name, sizeof(PgfText)+name->size+1);