PC/os2emx/pythonpm.c

   1 /* OS/2 PM main program - creates a hidden window, and starts Python
   2  * interpreter in a separate thread, so that Python scripts can be
   3  * run in PM process space without a console Window.  The interpreter
   4  * is incorporated by linking in the Python DLL.
   5  *
   6  * As it stands, I don't think this is adequate for supporting Python
   7  * GUI modules, as the Python thread doesn't have its own message
   8  * queue - which is required of threads that want to create/use
   9  * PM windows.
  10  *
  11  * This code owes a lot to "OS/2 Presentation Manager Programming", by
  12  * Charles Petzold.
  13  *
  14  * Andrew MacIntyre <andymac@bullseye.apana.org.au>, August 2001.
  15  * Released under the terms of the Python 2.1.1 licence - see the LICENCE
  16  * file in the Python v2.1.1 (or later) source distribution.
  17  * Copyright assigned to the Python Software Foundation, 2001.
  18  */
  19
  20 #define INCL_DOS
  21 #define INCL_WIN
  22 #include <os2.h>
  23 #include <process.h>
  24
  25 #include "Python.h"
  26
  27 /* use structure to pass command line to Python thread */
  28 typedef struct
  29 {
  30         int argc;
  31         char **argv;
  32         HWND Frame;
  33         int running;
  34 } arglist;
  35
  36 /* make this a global to simplify access.
  37  * it should only be set from the Python thread, or by the code that
  38  * initiates the Python thread when the thread cannot be created.
  39  */
  40 int PythonRC;
  41
  42 extern DL_EXPORT(int) Py_Main(int, char **);
  43 void PythonThread(void *);
  44
  45 int
  46 main(int argc, char **argv)
  47 {
  48         ULONG FrameFlags = FCF_TITLEBAR |
  49                            FCF_SYSMENU |
  50                            FCF_SIZEBORDER |
  51                            FCF_HIDEBUTTON |
  52                            FCF_SHELLPOSITION |
  53                            FCF_TASKLIST;
  54         HAB hab;
  55         HMQ hmq;
  56         HWND Client;
  57         QMSG qmsg;
  58         arglist args;
  59         int python_tid;
  60
  61         /* init PM and create message queue */
  62         hab = WinInitialize(0);
  63         hmq = WinCreateMsgQueue(hab, 0);
  64
  65         /* create a (hidden) Window to house the window procedure */
  66         args.Frame = WinCreateStdWindow(HWND_DESKTOP,
  67                                         0,
  68                                         &FrameFlags,
  69                                         NULL,
  70                                         "PythonPM",
  71                                         0L,
  72                                         0,
  73                                         0,
  74                                         &Client);
  75
  76         /* run Python interpreter in a thread */
  77         args.argc = argc;
  78         args.argv = argv;
  79         args.running = 0;
  80         if (-1 == (python_tid = _beginthread(PythonThread, NULL, 1024 * 1024, &args)))
  81         {
  82                 /* couldn't start thread */
  83                 WinAlarm(HWND_DESKTOP, WA_ERROR);
  84                 PythonRC = 1;
  85         }
  86         else
  87         {
  88                 /* process PM messages, until Python exits */
  89                 while (WinGetMsg(hab, &qmsg, NULLHANDLE, 0, 0))
  90                         WinDispatchMsg(hab, &qmsg);
  91                 if (args.running > 0)
  92                         DosKillThread(python_tid);
  93         }
  94
  95         /* destroy window, shutdown message queue and PM */
  96         WinDestroyWindow(args.Frame);
  97         WinDestroyMsgQueue(hmq);
  98         WinTerminate(hab);
  99
 100         return PythonRC;
 101 }
 102
 103 void PythonThread(void *argl)
 104 {
 105         HAB hab;
 106         arglist *args;
 107
 108         /* PM initialisation */
 109         hab = WinInitialize(0);
 110
 111         /* start Python */
 112         args = (arglist *)argl;
 113         args->running = 1;
 114         PythonRC = Py_Main(args->argc, args->argv);
 115
 116         /* enter a critical section and send the termination message */
 117         DosEnterCritSec();
 118         args->running = 0;
 119         WinPostMsg(args->Frame, WM_QUIT, NULL, NULL);
 120
 121         /* shutdown PM and terminate thread */
 122         WinTerminate(hab);
 123         _endthread();
 124 }