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https://github.com/panda3d/panda3d.git
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141 lines
3.8 KiB
C++
141 lines
3.8 KiB
C++
// Filename: p3dSession.h
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// Created by: drose (03Jun09)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) Carnegie Mellon University. All rights reserved.
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//
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// All use of this software is subject to the terms of the revised BSD
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// license. You should have received a copy of this license along
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// with this source code in a file named "LICENSE."
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//
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////////////////////////////////////////////////////////////////////
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#ifndef P3DSESSION_H
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#define P3DSESSION_H
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#include "p3d_plugin_common.h"
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#include "handleStream.h"
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#include "p3dPackage.h"
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#include <map>
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#include <vector>
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#include <tinyxml.h>
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class P3DInstance;
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class P3DProgressWindow;
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////////////////////////////////////////////////////////////////////
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// Class : P3DSession
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// Description : Corresponds to a single session: a subprocess with a
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// unique instance of Python running within it, which
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// might include one or more P3DInstance objects running
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// in the same memory space with each other.
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////////////////////////////////////////////////////////////////////
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class P3DSession {
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public:
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P3DSession(P3DInstance *inst);
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~P3DSession();
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inline const string &get_session_key() const;
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inline const string &get_python_version() const;
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void start_instance(P3DInstance *inst);
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void terminate_instance(P3DInstance *inst);
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inline int get_num_instances() const;
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void send_command(TiXmlDocument *command);
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private:
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void install_progress(P3DPackage *package, double progress);
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void start_p3dpython();
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void spawn_read_thread();
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void join_read_thread();
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private:
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// These methods run only within the read thread.
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void rt_thread_run();
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void rt_terminate();
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void rt_handle_request(TiXmlDocument *doc);
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P3D_request *rt_make_p3d_request(TiXmlElement *xrequest);
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P3DVariant *rt_from_xml_variant(TiXmlElement *xvariant);
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#ifdef _WIN32
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static DWORD WINAPI win_rt_thread_run(LPVOID data);
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#else
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static void *posix_rt_thread_run(void *data);
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#endif
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#ifdef _WIN32
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static HANDLE
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win_create_process(const string &program, const string &start_dir,
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const string &env, const string &output_filename,
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HandleStream &pipe_read, HandleStream &pipe_write);
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#else
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static int
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posix_create_process(const string &program, const string &start_dir,
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const string &env, const string &output_filename,
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HandleStream &pipe_read, HandleStream &pipe_write);
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#endif
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class PackageCallback : public P3DPackage::Callback {
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public:
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PackageCallback(P3DSession *session);
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virtual void install_progress(P3DPackage *package, double progress);
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virtual void package_ready(P3DPackage *package, bool success);
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protected:
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P3DSession *_session;
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};
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private:
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string _session_key;
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string _python_version;
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string _output_filename;
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string _python_root_dir;
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typedef map<int, P3DInstance *> Instances;
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Instances _instances;
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LOCK _instances_lock;
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// Commands that are queued up to send down the pipe. Normally
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// these only accumulate before the python process has been started;
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// after that, commands are written to the pipe directly.
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typedef vector<TiXmlDocument *> Commands;
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Commands _commands;
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P3DPackage *_panda3d;
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PackageCallback *_panda3d_callback;
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// Members for communicating with the p3dpython child process.
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#ifdef _WIN32
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HANDLE _p3dpython_handle;
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#else
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int _p3dpython_pid;
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#endif
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bool _p3dpython_running;
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// The remaining members are manipulated by or for the read thread.
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bool _started_read_thread;
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HandleStream _pipe_read;
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HandleStream _pipe_write;
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bool _read_thread_continue;
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#ifdef _WIN32
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HANDLE _read_thread;
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#else
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pthread_t _read_thread;
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#endif
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friend class PackageCallback;
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};
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#include "p3dSession.I"
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#endif
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