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Thread Class ReferenceA thread; that is, a lightweight process. More...
Inheritance diagram for Thread:
Detailed DescriptionA thread; that is, a lightweight process. This is an abstract base class; to use it, you must subclass from it and redefine thread_main(). The thread itself will keep a reference count on the Thread object while it is running; when the thread returns from its root function, the Thread object will automatically be destructed if no other pointers are referencing it. Constructor & Destructor Documentation
Creates a new Thread object, but does not immediately start executing it. This gives the caller a chance to store it in a PT(Thread) object, if desired, before the thread gets a chance to terminate and destruct itself. Call start() to begin thread execution. The name should be unique for each thread (though this is not enforced, and not strictly required). The sync_name can be shared between multiple different threads; threads that run synchronously with each other should be given the same sync_name, for the benefit of PStats. Definition at line 46 of file thread.cxx. Member Function Documentation
Possibly suspends the current thread for the rest of the current epoch, if it has run for enough this epoch. This is especially important for the simple thread implementation, which relies on cooperative yields like this. Definition at line 263 of file thread.I. Referenced by PartGroup::bind_hierarchy(), PartGroup::check_hierarchy(), Texture::do_load_one(), Texture::do_read_one(), DatagramInputFile::get_datagram(), PNMImage::quick_filter_from(), SceneGraphReducer::r_apply_attribs(), SceneGraphReducer::r_collect_vertex_data(), SceneGraphReducer::r_unify(), PNMReader::read_data(), VertexDataSaveFile::read_data(), DatagramInputFile::read_header(), BamReader::read_pointer(), SceneGraphReducer::remove_unused_vertices(), GraphicsEngine::render_frame(), and PNMWriter::write_data().
Suspends the current thread for the rest of the current epoch. Definition at line 248 of file thread.I. Referenced by DatagramGeneratorNet::get_datagram(), ConnectionListener::process_incoming_data(), VertexDataSaveFile::read_data(), GraphicsEngine::render_frame(), and ConnectionManager::wait_for_readers().
Returns the integer pipeline stage associated with the current thread. This is the same thing as get_current_thread()->get_pipeline_stage(), but it may be faster to retrieve in some contexts. Definition at line 167 of file thread.I. References get_current_thread(), and get_pipeline_stage(). Referenced by PartBundle::clear_control_effects(), DisplayRegion::compute_pixels_all_stages(), PartBundle::control_activated(), PartBundle::do_bind_anim(), DisplayRegion::set_active(), PartBundle::set_anim_blend_flag(), PartBundle::set_blend_type(), DisplayRegion::set_camera(), PartBundle::set_control_effect(), DisplayRegion::set_cube_map_index(), DisplayRegion::set_dimensions(), PartBundle::set_frame_blend_flag(), DisplayRegion::set_lens_index(), PartBundle::set_root_xform(), DisplayRegion::set_sort(), DisplayRegion::set_stereo_channel(), DisplayRegion::set_tex_view_offset(), and PartBundle::xform().
Returns the task currently executing on this thread (via the AsyncTaskManager), if any, or NULL if the thread is not currently servicing a task.
Returns a pointer to the currently-executing Thread object. If this is called from the main thread, this will return the same value as get_main_thread(). This will always return some valid Thread pointer. It will never return NULL, even if the current thread was spawned outside of Panda's threading system, although all non-Panda threads will return the exact same Thread pointer. Definition at line 145 of file thread.I. References get_external_thread(), and get_main_thread(). Referenced by GeomNode::add_geom(), GeomNode::add_geoms_from(), SpeedTreeNode::add_instances(), CharacterJoint::add_local_transform(), CharacterJoint::add_net_transform(), Geom::add_primitive(), TransformBlend::add_transform(), PandaNode::adjust_draw_mask(), PandaNode::apply_attribs_to_vertices(), GeomNode::apply_attribs_to_vertices(), PartBundleNode::apply_attribs_to_vertices(), GeomPrimitive::check_valid(), Geom::check_valid(), PandaNode::clear_attrib(), PandaNode::clear_effect(), Geom::clear_primitives(), DXGraphicsStateGuardian9::close_gsg(), DXGraphicsStateGuardian8::close_gsg(), GraphicsStateGuardian::close_gsg(), GeomVertexArrayData::compare_to(), PandaNode::copy_all_properties(), PandaNode::copy_tags(), RigidBodyCombiner::cull_callback(), GeomNode::decompose(), Geom::decompose_in_place(), PandaNode::disable_cull_callback(), GeomNode::do_premunge(), AsyncTaskChain::do_stop_threads(), AnimateVerticesRequest::do_task(), MayaPview::doIt(), Geom::doubleside_in_place(), JointVertexTransform::fillin(), GeomNode::finalize(), PartBundle::finalize(), GraphicsEngine::flip_frame(), DriveInterface::force_dgraph(), PartBundle::force_update(), get_current_pipeline_stage(), CycleDataWriter< CycleDataType >::get_current_thread(), CycleDataStageWriter< CycleDataType >::get_current_thread(), CycleDataStageReader< CycleDataType >::get_current_thread(), CycleDataReader< CycleDataType >::get_current_thread(), CycleDataLockedStageReader< CycleDataType >::get_current_thread(), CycleDataLockedReader< CycleDataType >::get_current_thread(), GeomPrimitive::get_first_vertex(), GeomPrimitive::get_index_stride(), GeomPrimitive::get_max_vertex(), GeomPrimitive::get_min_vertex(), PandaNode::get_net_draw_control_mask(), PandaNode::get_net_draw_show_mask(), GeomVertexData::get_num_bytes(), WorkingNodePath::get_num_nodes(), GeomPrimitive::get_num_primitives(), GeomVertexData::get_num_rows(), GeomPrimitive::get_num_vertices(), PStatThread::get_thread(), GeomPrimitive::get_vertex(), RenderAttrib::init_attribs(), TransformState::init_states(), RenderState::init_states(), RenderEffects::init_states(), GeomPrimitive::is_indexed(), JointVertexTransform::JointVertexTransform(), PandaFramework::main_loop(), GeomPrimitive::make_nonindexed(), Geom::make_nonindexed(), Geom::make_points_in_place(), TransformBlend::normalize_weights(), Geom::offset_vertices(), GraphicsEngine::open_windows(), NodePathComponent::output(), GeomPrimitive::pack_vertices(), PandaNode::prepare_scene(), BamReader::read_cdata(), VertexDataSaveFile::read_data(), GraphicsEngine::ready_flip(), GeomTransformer::register_vertices(), GraphicsEngine::remove_all_windows(), Geom::remove_primitive(), TransformBlend::remove_transform(), GraphicsEngine::remove_window(), GraphicsEngine::render_frame(), PandaNode::replace_node(), GeomVertexData::reserve_num_rows(), SheetNode::reset_bound(), RopeNode::reset_bound(), DXGraphicsStateGuardian9::reset_d3d_device(), DXGraphicsStateGuardian8::reset_d3d_device(), Geom::reverse_in_place(), Geom::rotate_in_place(), AsyncTaskChain::service_one_task(), GeomVertexData::set_array(), PandaNode::set_attrib(), PandaNode::set_bounds(), PandaNode::set_bounds_type(), PandaNode::set_cull_callback(), ClockObject::set_dt(), PandaNode::set_effect(), ClockObject::set_frame_rate(), PandaNode::set_internal_bounds(), PandaNode::set_into_collide_mask(), UserVertexTransform::set_matrix(), ClockObject::set_mode(), GeomVertexData::set_num_rows(), Geom::set_primitive(), UserVertexSlider::set_slider(), FrameRateMeter::set_text_pattern(), Geom::set_usage_hint(), Geom::set_vertex_data(), BamCache::store(), GraphicsEngine::sync_frame(), GeomTransformer::transform_vertices(), GeomVertexData::unclean_set_num_rows(), GeomNode::unify(), Geom::unify_in_place(), AsyncTask::unlock_and_do_task(), VideoTexture::unlocked_ensure_ram_image(), Texture::unlocked_ensure_ram_image(), GeomDrawCallbackData::upcall(), DisplayRegionDrawCallbackData::upcall(), DisplayRegionCullCallbackData::upcall(), CallbackGraphicsWindow::RenderCallbackData::upcall(), SceneGraphAnalyzerMeter::update(), FrameRateMeter::update(), PartBundle::update(), AnimControl::wait_pending(), and BamWriter::write_cdata().
Returns a pointer to the "external" Thread object--this is a special Thread object that corresponds to any thread spawned outside of Panda's threading interface. Note that multiple different threads may share this same pointer. Definition at line 124 of file thread.I. Referenced by get_current_thread().
Returns a pointer to the "main" Thread object--this is the Thread that started the whole process. Definition at line 107 of file thread.I. Referenced by get_current_thread(), RenderAttrib::init_attribs(), TransformState::init_states(), RenderState::init_states(), and RenderEffects::init_states().
Returns the Pipeline stage number associated with this thread. The default stage is 0 if no stage is specified otherwise. See set_pipeline_stage(). Definition at line 84 of file thread.I. Referenced by PandaNode::add_stashed(), NodePath::any_path(), NodePath::attach_new_node(), NodePath::detach_node(), NodePath::get_ancestor(), NodePath::get_child(), NodePath::get_children(), get_current_pipeline_stage(), NodePath::get_hidden_ancestor(), PandaNode::get_internal_vertices(), PandaNode::get_nested_vertices(), PandaNode::get_net_collide_mask(), PandaNode::get_net_draw_control_mask(), PandaNode::get_net_draw_show_mask(), NodePath::get_node(), WorkingNodePath::get_num_nodes(), NodePath::get_num_nodes(), NodePath::get_parent(), NodePath::get_sort(), NodePath::get_stashed_ancestor(), NodePath::get_stashed_children(), NodePath::get_top(), NodePath::instance_to(), NodePath::is_singleton(), NodePath::NodePath(), NodePathComponent::output(), PandaNode::remove_child(), NodePath::remove_node(), PandaNode::remove_stashed(), NodePath::reparent_to(), PandaNode::reset_all_prev_transform(), SheetNode::reset_bound(), RopeNode::reset_bound(), ClockObject::set_frame_count(), ClockObject::set_frame_rate(), ClockObject::set_frame_time(), ClockObject::set_mode(), NodePath::stash(), PandaNode::stash_child(), NodePath::stash_to(), ClockObject::tick(), NodePath::unstash(), PandaNode::unstash_child(), and NodePath::verify_complete().
Returns the PStats callback associated with this thread, or NULL if no callback has yet been associated with this thread. This is used internally by the PStatClient; you should not need to call this directly.
Returns the PStats index associated with this thread, or -1 if no index has yet been associated with this thread. This is used internally by the PStatClient; you should not need to call this directly. Definition at line 60 of file thread.I. Referenced by PStatThread::PStatThread().
Returns a string that is guaranteed to be unique to this thread, across all processes on the machine, during at least the lifetime of this process. Definition at line 72 of file thread.I. Referenced by BamCache::store().
Returns true if Panda is currently compiled for "simple threads", which is to say, cooperative context switching only, reducing the need for quite so many critical section protections. This is not necessarily the opposite of "true threads", since one possible implementation of simple threads is via true threads with mutex protection to ensure only one runs at a time.
Returns true if threading support has been compiled in and enabled, or false if no threading is available (and Thread::start() will always fail). Definition at line 185 of file thread.I. Referenced by ConnectionReader::ConnectionReader(), ConnectionWriter::ConnectionWriter(), AsyncTaskChain::do_start_threads(), AsyncTaskChain::set_num_threads(), and GraphicsEngine::set_threading_model().
Returns true if a real threading library is available that supports actual OS-implemented threads, or false if the only threading we can provide is simulated user-space threading. Definition at line 201 of file thread.I. Referenced by GraphicsEngine::render_frame(), and NodePath::verify_complete().
Blocks the calling process until the thread terminates. If the thread has already terminated, this returns immediately. Definition at line 298 of file thread.I. Referenced by AsyncTaskChain::do_stop_threads().
Outputs the Namable. This function simply writes the name to the output stream; most Namable derivatives will probably redefine this. Reimplemented from Namable. Definition at line 172 of file thread.cxx.
Writes a description of the mutex or condition variable that this thread is blocked on. Writes nothing if there is no blocker, or if we are not in DEBUG_THREADS mode. Definition at line 185 of file thread.cxx.
Should be called by the main thread just before exiting the program, this blocks until any remaining thread cleanup has finished. Definition at line 341 of file thread.I. Referenced by PandaFramework::close_framework(), and GraphicsEngine::remove_all_windows().
Sets this thread's pipeline stage number to at least the indicated value, unless it is already larger. See set_pipeline_stage(). Definition at line 96 of file thread.I. References set_pipeline_stage().
Specifies the Pipeline stage number associated with this thread. The default stage is 0 if no stage is specified otherwise. This must be a value in the range [0 .. pipeline->get_num_stages() - 1]. It specifies the values that this thread observes for all pipelined data. Typically, an application thread will leave this at 0, but a render thread may set it to 1 or 2 (to operate on the previous frame's data, or the second previous frame's data). Definition at line 153 of file thread.cxx. Referenced by set_min_pipeline_stage().
Stores a PStats callback to be associated with this thread. This is used internally by the PStatClient; you should not need to call this directly.
Stores a PStats index to be associated with this thread. This is used internally by the PStatClient; you should not need to call this directly.
Suspends the current thread for at least the indicated amount of time. It might be suspended for longer. Definition at line 236 of file thread.I. Referenced by ModelLoadRequest::do_task(), TextureReloadRequest::do_task(), PStatServer::main_loop(), and MayaApi::MayaApi().
Starts the thread executing. It is only valid to call this once. The thread will begin executing its thread_main() function, and will terminate when thread_main() returns. priority is intended as a hint to the relative importance of this thread. This may be ignored by the thread implementation. joinable should be set true if you intend to call join() to wait for the thread to terminate, or false if you don't care and you will never call join(). Note that the reference count on the Thread object is incremented while the thread itself is running, so if you just want to fire and forget a thread, you may pass joinable = false, and never store the Thread object. It will automatically destruct itself when it finishes. The return value is true if the thread is successfully started, false otherwise. Definition at line 237 of file thread.cxx. The documentation for this class was generated from the following files:
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