thread.c

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/*
 * kernel_sys/thread.c
 *
 * Copyright (c) 2003-2004 Lukasz Dembinski <dembol@nasa.com.pl>
 * All Rights Reserved
 * 
 * Date:        2004/04
 * Author:      Lukasz Dembinski
 * Info:        thread.c core file
 * Contact:     mailto: <dembol@nasa.com.pl>
 *
 */

/*
 * TODO:
 * - switching to user mode 
 */

#include <agnix/agnix.h>
#include <asm/tss.h>
#include <agnix/tasks.h>
#include <agnix/list.h>
#include <agnix/console.h>
#include <agnix/spinlock.h>
#include <agnix/panic.h>
#include <agnix/errno.h>
#include <agnix/unistd.h>
#include <agnix/linkage.h>

#define MOD_NAME        "THREAD: "

int create_kernel_thread(const char *name, void (*thread_proc)(void *), void *data) 
{
    __asm__ __volatile__ (
        "movl %%esp, %%esi\n\t"
        "int $0x80\n\t"
        "cmpl %%esp, %%esi\n\t"
        "je 1f\n\t"

        "pushl %%edi\n\t"
        "call *%2\n\t"
        "1:"
    :
    :"a"(__NR_fork), "b"(name), "r"(thread_proc), "D"((u32)data)
    );

    if (current_task->t_pid)
        kernel_panic("Kernel thread terminated...\n");

    return 0;
}

int create_user_thread(const char *name, void (*thread_proc)(void *data), void *data) 
{
    fork();
    
    if (current_task->t_pid > 0) {
//      task_set_user_mode(&(current_thread->tss_wrap->tss), 
        (*thread_proc)(data);
    } else 
    if (current_task->t_pid < 0) {
        kernel_panic(MOD_NAME "I can not create kernel thread\n");
    }
    
    return 0;
}

int threads_init(void)
{
    return 0;
}