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ARROW-12051: [GLib] Keep input stream reference of GArrowCSVReader #9777

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ARROW-12051: [GLib] Keep input stream reference of GArrowCSVReader #9777

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47 changes: 41 additions & 6 deletions c_glib/arrow-glib/reader.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1479,10 +1479,12 @@ garrow_csv_read_options_add_column_name(GArrowCSVReadOptions *options,

typedef struct GArrowCSVReaderPrivate_ {
std::shared_ptr<arrow::csv::TableReader> reader;
GArrowInputStream *input;
} GArrowCSVReaderPrivate;

enum {
PROP_CSV_TABLE_READER = 1
PROP_CSV_TABLE_READER = 1,
PROP_INPUT,
};

G_DEFINE_TYPE_WITH_PRIVATE(GArrowCSVReader,
Expand All @@ -1499,11 +1501,24 @@ garrow_csv_reader_dispose(GObject *object)
{
auto priv = GARROW_CSV_READER_GET_PRIVATE(object);

priv->reader = nullptr;
if (priv->input) {
g_object_unref(priv->input);
priv->input = nullptr;
}

G_OBJECT_CLASS(garrow_csv_reader_parent_class)->dispose(object);
}

static void
garrow_csv_reader_finalize(GObject *object)
{
auto priv = GARROW_CSV_READER_GET_PRIVATE(object);

priv->reader.~shared_ptr();

G_OBJECT_CLASS(garrow_csv_reader_parent_class)->finalize(object);
}

static void
garrow_csv_reader_set_property(GObject *object,
guint prop_id,
Expand All @@ -1517,6 +1532,9 @@ garrow_csv_reader_set_property(GObject *object,
priv->reader =
*static_cast<std::shared_ptr<arrow::csv::TableReader> *>(g_value_get_pointer(value));
break;
case PROP_INPUT:
priv->input = GARROW_INPUT_STREAM(g_value_dup_object(value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
Expand All @@ -1529,7 +1547,12 @@ garrow_csv_reader_get_property(GObject *object,
GValue *value,
GParamSpec *pspec)
{
auto priv = GARROW_CSV_READER_GET_PRIVATE(object);

switch (prop_id) {
case PROP_INPUT:
g_value_set_object(value, priv->input);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
Expand All @@ -1539,25 +1562,35 @@ garrow_csv_reader_get_property(GObject *object,
static void
garrow_csv_reader_init(GArrowCSVReader *object)
{
auto priv = GARROW_CSV_READER_GET_PRIVATE(object);
new(&priv->reader) std::shared_ptr<arrow::csv::TableReader>;
}

static void
garrow_csv_reader_class_init(GArrowCSVReaderClass *klass)
{
GParamSpec *spec;

auto gobject_class = G_OBJECT_CLASS(klass);

gobject_class->dispose = garrow_csv_reader_dispose;
gobject_class->finalize = garrow_csv_reader_finalize;
gobject_class->set_property = garrow_csv_reader_set_property;
gobject_class->get_property = garrow_csv_reader_get_property;

GParamSpec *spec;
spec = g_param_spec_pointer("csv-table-reader",
"CSV table reader",
"The raw std::shared<arrow::csv::TableReader> *",
static_cast<GParamFlags>(G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property(gobject_class, PROP_CSV_TABLE_READER, spec);

spec = g_param_spec_object("input",
"Input",
"The input stream to be read",
GARROW_TYPE_INPUT_STREAM,
static_cast<GParamFlags>(G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property(gobject_class, PROP_INPUT, spec);
}

/**
Expand Down Expand Up @@ -1597,7 +1630,7 @@ garrow_csv_reader_new(GArrowInputStream *input,
parse_options,
convert_options);
if (garrow::check(error, arrow_reader, "[csv-reader][new]")) {
return garrow_csv_reader_new_raw(&(arrow_reader.ValueOrDie()));
return garrow_csv_reader_new_raw(&(*arrow_reader), input);
} else {
return NULL;
}
Expand Down Expand Up @@ -2085,10 +2118,12 @@ garrow_feather_file_reader_get_raw(GArrowFeatherFileReader *reader)
}

GArrowCSVReader *
garrow_csv_reader_new_raw(std::shared_ptr<arrow::csv::TableReader> *arrow_reader)
garrow_csv_reader_new_raw(std::shared_ptr<arrow::csv::TableReader> *arrow_reader,
GArrowInputStream *input)
{
auto reader = GARROW_CSV_READER(g_object_new(GARROW_TYPE_CSV_READER,
"csv-table-reader", arrow_reader,
"input", input,
NULL));
return reader;
}
Expand Down
3 changes: 2 additions & 1 deletion c_glib/arrow-glib/reader.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -44,7 +44,8 @@ std::shared_ptr<arrow::ipc::feather::Reader>
garrow_feather_file_reader_get_raw(GArrowFeatherFileReader *reader);

GArrowCSVReader *
garrow_csv_reader_new_raw(std::shared_ptr<arrow::csv::TableReader> *arrow_reader);
garrow_csv_reader_new_raw(std::shared_ptr<arrow::csv::TableReader> *arrow_reader,
GArrowInputStream *input);
std::shared_ptr<arrow::csv::TableReader>
garrow_csv_reader_get_raw(GArrowCSVReader *reader);

Expand Down