home *** CD-ROM | disk | FTP | other *** search
- /*
- * This file forms part of "TKERN" - "Troy's Kernel for Windows".
- *
- * Copyright (C) 1994 Troy Rollo <troy@cbme.unsw.EDU.AU>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- #include <windows.h>
- #include <toolhelp.h>
- #include <stdlib.h>
- #include <memory.h>
- #include <string.h>
- #include <alloc.h>
- #include <stdarg.h>
- #include <errno.h>
- #include <sys/tfile.h>
- #include <sys/task.h>
- #include <sys/ioctl.h>
- #include <sys/wait.h>
- #include <sys/tkern.h>
-
- int nSleepers = 0; // Number of sleeping tasks
-
- /*
- * We couldn't use PeekMessage because you can't seem to have 2 tkern tasks
- * using PeekMessage loops at the same time. GetMessages puts the current task
- * to sleep and marks it as sleeping. The file manager will issue a wakeup
- * call when an event has occurred on which sleeping tasks are waiting.
- * This will cause tkern to send a dummy message to all tasks which are sleeping.
- * That will cause the GetMessage call to return
- */
-
- void GetMessages(struct task *pt)
- {
- MSG msg;
-
- nSleepers++;
- pt->nFlags |= TF_ASLEEP;
- GetMessage(&msg, 0, 0, 0);
- if (msg.message != TKWM_WAKEUP)
- {
- TranslateMessage(&msg);
- DispatchMessage(&msg);
- }
- if (pt->nFlags & TF_ASLEEP)
- {
- nSleepers--;
- pt->nFlags &= ~TF_ASLEEP;
- }
- }
-
- /* FlushMessages should be used only when there is no alternative */
- void FlushMessages(void)
- {
- MSG msg;
-
- while (PeekMessage(&msg, 0, 0, 0, PM_REMOVE))
- {
- TranslateMessage(&msg);
- DispatchMessage(&msg);
- }
- }
-
-
- /*
- * This function is used by tkern_exec() to copy the argument and
- * environment vectors.
- */
-
- void
- Copy_Array(char ***dest, char **source)
- {
- int i;
- int nBytes = sizeof(char *);
- char *pchBuffer;
- char **ppchVector;
-
- for (i = 0; source[i]; i++)
- {
- nBytes += strlen(source[i]) + 1;
- }
- nBytes += (i + 1) * sizeof(char *);
- ppchVector = (char **) malloc(nBytes);
- *dest = ppchVector;
- pchBuffer = (char *) (ppchVector + i + 1);
- while (*source)
- {
- *ppchVector++ = pchBuffer;
- strcpy(pchBuffer, *source);
- pchBuffer += strlen(pchBuffer) + 1;
- source++;
- }
- *ppchVector = 0;
- }
-