# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

import gdb

from gdbpp import GeckoPrettyPrinter


@GeckoPrettyPrinter("nsAutoOwningThread", "^nsAutoOwningThread$")
class owning_thread_printer:
    def __init__(self, value):
        self.value = value

    def to_string(self):
        prthread_type = gdb.lookup_type("PRThread").pointer()
        prthread = self.value["mThread"].cast(prthread_type)
        name = prthread["name"]

        # if the thread doesn't have a name try to get its thread id (might not
        # work on !linux)
        name = prthread["tid"]

        return name if name else "(PRThread *) %s" % prthread
