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riscos.c
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00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is the Netscape Portable Runtime (NSPR).
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998-2000
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s): Peter Naulls <peter@chocky.org>
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either the GNU General Public License Version 2 or later (the "GPL"), or
00026  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
00028  * of those above. If you wish to allow use of your version of this file only
00029  * under the terms of either the GPL or the LGPL, and not to allow others to
00030  * use your version of this file under the terms of the MPL, indicate your
00031  * decision by deleting the provisions above and replace them with the notice
00032  * and other provisions required by the GPL or the LGPL. If you do not delete
00033  * the provisions above, a recipient may use your version of this file under
00034  * the terms of any one of the MPL, the GPL or the LGPL.
00035  *
00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 #include "primpl.h"
00039 
00040 void _MD_EarlyInit(void)
00041 {
00042 }
00043 
00044 PRWord *_MD_HomeGCRegisters(PRThread *t, int isCurrent, int *np)
00045 {
00046 #ifndef _PR_PTHREADS
00047     if (isCurrent) {
00048        (void) setjmp(CONTEXT(t));
00049     }
00050     *np = sizeof(CONTEXT(t)) / sizeof(PRWord);
00051     return (PRWord *) CONTEXT(t);
00052 #else
00053        *np = 0;
00054        return NULL;
00055 #endif
00056 }
00057 
00058 #ifdef _PR_PTHREADS
00059 
00060 void _MD_CleanupBeforeExit(void)
00061 {
00062 }
00063 
00064 #else /* ! _PR_PTHREADS */
00065 
00066 void
00067 _MD_SET_PRIORITY(_MDThread *thread, PRUintn newPri)
00068 {
00069     return;
00070 }
00071 
00072 PRStatus
00073 _MD_InitializeThread(PRThread *thread)
00074 {
00075        /*
00076         * set the pointers to the stack-pointer and frame-pointer words in the
00077         * context structure; this is for debugging use.
00078         */
00079        thread->md.sp = _MD_GET_SP_PTR(thread);
00080        thread->md.fp = _MD_GET_FP_PTR(thread);
00081        return PR_SUCCESS;
00082 }
00083 
00084 PRStatus
00085 _MD_WAIT(PRThread *thread, PRIntervalTime ticks)
00086 {
00087     PR_ASSERT(!(thread->flags & _PR_GLOBAL_SCOPE));
00088     _PR_MD_SWITCH_CONTEXT(thread);
00089     return PR_SUCCESS;
00090 }
00091 
00092 PRStatus
00093 _MD_WAKEUP_WAITER(PRThread *thread)
00094 {
00095     if (thread) {
00096        PR_ASSERT(!(thread->flags & _PR_GLOBAL_SCOPE));
00097     }
00098     return PR_SUCCESS;
00099 }
00100 
00101 /* These functions should not be called for RISC OS */
00102 void
00103 _MD_YIELD(void)
00104 {
00105     PR_NOT_REACHED("_MD_YIELD should not be called for RISC OS.");
00106 }
00107 
00108 PRStatus
00109 _MD_CREATE_THREAD(
00110     PRThread *thread,
00111     void (*start) (void *),
00112     PRThreadPriority priority,
00113     PRThreadScope scope,
00114     PRThreadState state,
00115     PRUint32 stackSize)
00116 {
00117     PR_NOT_REACHED("_MD_CREATE_THREAD should not be called for RISC OS.");
00118        return PR_FAILURE;
00119 }
00120 #endif /* ! _PR_PTHREADS */