/*
 * Wine portability routines
 *
 * Copyright 2000 Alexandre Julliard
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "config.h"
#include "wine/port.h"

#include <stdlib.h>
#include <string.h>
#include <sys/types.h>

#include "wine/library.h"
#include "wine/pthread.h"

/* Note: the wine_pthread functions are just placeholders,
 * they will be overridden by the pthread support code.
 */

/***********************************************************************
 *           wine_pthread_init_process
 */
void wine_pthread_init_process( const struct wine_pthread_functions *functions )
{
}

/***********************************************************************
 *           wine_pthread_init_thread
 */
void wine_pthread_init_thread( struct wine_pthread_thread_info *info )
{
}

/***********************************************************************
 *           wine_pthread_create_thread
 */
int wine_pthread_create_thread( struct wine_pthread_thread_info *info )
{
    return -1;
}

/***********************************************************************
 *           wine_pthread_init_current_teb
 */
void wine_pthread_init_current_teb( struct wine_pthread_thread_info *info )
{
}

/***********************************************************************
 *           wine_pthread_get_current_teb
 */
void *wine_pthread_get_current_teb(void)
{
    return NULL;
}

/***********************************************************************
 *           wine_pthread_exit_thread
 */
void wine_pthread_exit_thread( struct wine_pthread_thread_info *info )
{
    exit( info->exit_status );
}

/***********************************************************************
 *           wine_pthread_abort_thread
 */
void wine_pthread_abort_thread( int status )
{
    exit( status );
}


/***********************************************************************
 *           wine_switch_to_stack
 *
 * Switch to the specified stack and call the function.
 */
void DECLSPEC_NORETURN wine_switch_to_stack( void (*func)(void *), void *arg, void *stack );
#if defined(__i386__) && defined(__GNUC__)
__ASM_GLOBAL_FUNC( wine_switch_to_stack,
                   "movl 4(%esp),%ecx\n\t"  /* func */
                   "movl 8(%esp),%edx\n\t"  /* arg */
                   "movl 12(%esp),%esp\n\t"  /* stack */
                   "pushl %edx\n\t"
                   "xorl %ebp,%ebp\n\t"
                   "call *%ecx\n\t"
                   "int $3" /* we never return here */ );
#elif defined(__i386__) && defined(_MSC_VER)
__declspec(naked) void wine_switch_to_stack( void (*func)(void *), void *arg, void *stack )
{
  __asm mov ecx, 4[esp];
  __asm mov edx, 8[esp];
  __asm mov esp, 12[esp];
  __asm push edx;
  __asm xor ebp, ebp;
  __asm call [ecx];
  __asm int 3;
}
#elif defined(__sparc__) && defined(__GNUC__)
__ASM_GLOBAL_FUNC( wine_switch_to_stack,
                   "mov %o0, %l0\n\t" /* store first argument */
                   "mov %o1, %l1\n\t" /* store second argument */
                   "sub %o2, 96, %sp\n\t" /* store stack */
                   "call %l0, 0\n\t" /* call func */
                   "mov %l1, %o0\n\t" /* delay slot:  arg for func */
                   "ta 0x01"); /* breakpoint - we never get here */
#elif defined(__powerpc__) && defined(__APPLE__)
__ASM_GLOBAL_FUNC( wine_switch_to_stack,
                   "mtctr r3\n\t" /* func -> ctr */
                   "mr r3,r4\n\t" /* args -> function param 1 (r3) */
                   "mr r1,r5\n\t" /* stack */
                   "subi r1,r1,0x100\n\t" /* adjust stack pointer */
                   "bctr\n" /* call ctr */
                   "1:\tb 1b"); /* loop */
#elif defined(__powerpc__) && defined(__GNUC__)
__ASM_GLOBAL_FUNC( wine_switch_to_stack,
                   "mtctr 3\n\t" /* func -> ctr */
                   "mr 3,4\n\t" /* args -> function param 1 (r3) */
                   "mr 1,5\n\t" /* stack */
                   "bctr\n\t" /* call ctr */
                   "1:\tb 1b"); /* loop */
#elif defined(__ALPHA__) && defined(__GNUC__)
__ASM_GLOBAL_FUNC( wine_switch_to_stack,
                   "mov $16,$0\n\t" /* func */
                   "mov $17,$16\n\t" /* arg */
                   "mov $18,$30\n\t" /* stack */
                   "jsr $31,($0),0\n\t" /* call func */
                   "L1:\tbr $31,L1"); /* loop */
#else
#error You must implement wine_switch_to_stack for your platform
#endif