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new mulithreading switch function.

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should work on both linux and win32 platforms
This commit is contained in:
fros4943 2007-04-02 08:47:28 +00:00
parent 5bceecfbb0
commit c06c28c668
1 changed files with 69 additions and 41 deletions
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60
platform/cooja/sys/cooja_mtarch.c
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@ -1,9 +1,38 @@
/*
* This file is ripped from x86/mtarch.c of the Contiki Multi-threading library.
* Fredrik Osterlind <fros@sics.se>
* Copyright (c) 2005, Swedish Institute of Computer Science
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
* @(#)$Id: cooja_mtarch.c,v 1.5 2007/04/02 08:47:28 fros4943 Exp $
*/
#include <stdio.h>
#include <string.h>
#include "sys/cooja_mt.h"
struct frame {
@ -19,19 +48,16 @@ struct frame {
unsigned long retaddr2;
unsigned long data;
};
/*--------------------------------------------------------------------------*/
void
cooja_mtarch_init(void)
{
}
/*--------------------------------------------------------------------------*/
void
cooja_mtarch_start(struct cooja_mtarch_thread *t,
void (*function)(void *), void *data)
{
struct frame *f = (struct frame *)&t->stack[COOJA_MTARCH_STACKSIZE - sizeof(struct frame)/4];
int i;
@ -46,11 +72,12 @@ cooja_mtarch_start(struct cooja_mtarch_thread *t,
f->ebp = (unsigned long)&f->eax;
}
/*--------------------------------------------------------------------------*/
static struct cooja_mtarch_thread *cooja_running_thread;
/*--------------------------------------------------------------------------*/
void cooja_sw(void)
{
/* Store registers */
__asm__ (
"cooja_sw:\n\t"
"pushl %ebp\n\t"
"movl %esp, %ebp\n\t"
"pushl %eax\n\t"
"pushl %ebx\n\t"
"pushl %ecx\n\t"
@ -58,13 +85,18 @@ __asm__ (
"pushl %esi\n\t"
"pushl %edi\n\t"
"pushl %ebp\n\t"
"pushl %ebp\n\t"
"pushl %ebp\n\t");
"movl cooja_running_thread, %eax\n\t"
/* Switch stack pointer */
__asm__ ("movl %0, %%eax\n\t" : : "m" (cooja_running_thread));
__asm__ (
"movl 0(%eax), %ebx\n\t"
"movl %esp, 0(%eax)\n\t"
"movl %ebx, %esp\n\t"
);
/* Restore stored registers and return "our" way */
__asm__ (
"popl %ebp\n\t"
"popl %ebp\n\t"
"popl %edi\n\t"
@ -77,8 +109,7 @@ __asm__ (
"leave\n\t"
"ret\n\t"
);
/*--------------------------------------------------------------------------*/
static struct cooja_mtarch_thread *cooja_running_thread;
}
/*--------------------------------------------------------------------------*/
void
cooja_mtarch_exec(struct cooja_mtarch_thread *t)
@ -91,7 +122,6 @@ cooja_mtarch_exec(struct cooja_mtarch_thread *t)
void
cooja_mtarch_remove(void)
{
}
/*--------------------------------------------------------------------------*/
void
@ -103,13 +133,11 @@ cooja_mtarch_yield(void)
void
cooja_mtarch_pstop(void)
{
}
/*--------------------------------------------------------------------------*/
void
cooja_mtarch_pstart(void)
{
}
/*--------------------------------------------------------------------------*/
int