wine/loader/pthread.c

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/*
* Wine threading routines using the pthread library
*
* Copyright 2003 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#ifdef HAVE_PTHREAD_H
#include <assert.h>
#include <stdlib.h>
#include <signal.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <string.h>
#include <sys/types.h>
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#include "wine/library.h"
#include "wine/pthread.h"
static int init_done;
static int nb_threads = 1;
#ifndef __i386__
static pthread_key_t teb_key;
#endif
/***********************************************************************
* init_process
*
* Initialization for a newly created process.
*/
static void init_process( const struct wine_pthread_callbacks *callbacks, size_t size )
{
init_done = 1;
}
/***********************************************************************
* init_thread
*
* Initialization for a newly created thread.
*/
static void init_thread( struct wine_pthread_thread_info *info )
{
/* retrieve the stack info (except for main thread) */
if (init_done)
{
#ifdef HAVE_PTHREAD_GETATTR_NP
pthread_attr_t attr;
pthread_getattr_np( pthread_self(), &attr );
pthread_attr_getstack( &attr, &info->stack_base, &info->stack_size );
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pthread_attr_destroy( &attr );
#elif defined(HAVE_PTHREAD_ATTR_GET_NP)
pthread_attr_t attr;
pthread_attr_init( &attr );
pthread_attr_get_np( pthread_self(), &attr );
pthread_attr_getstack( &attr, &info->stack_base, &info->stack_size );
pthread_attr_destroy( &attr );
#elif defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
char dummy;
info->stack_size = pthread_get_stacksize_np(pthread_self());
info->stack_base = pthread_get_stackaddr_np(pthread_self());
/* if base is too large assume it's the top of the stack instead */
if ((char *)info->stack_base > &dummy)
info->stack_base = (char *)info->stack_base - info->stack_size;
#else
/* assume that the stack allocation is page aligned */
char dummy;
size_t page_size = getpagesize();
char *stack_top = (char *)((unsigned long)&dummy & ~(page_size - 1)) + page_size;
info->stack_base = stack_top - info->stack_size;
#endif
}
}
/***********************************************************************
* create_thread
*/
static int create_thread( struct wine_pthread_thread_info *info )
{
pthread_t id;
pthread_attr_t attr;
int ret = 0;
pthread_attr_init( &attr );
pthread_attr_setstacksize( &attr, info->stack_size );
pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_DETACHED );
pthread_attr_setscope( &attr, PTHREAD_SCOPE_SYSTEM ); /* force creating a kernel thread on Solaris */
interlocked_xchg_add( &nb_threads, 1 );
if (pthread_create( &id, &attr, (void * (*)(void *))info->entry, info ))
{
interlocked_xchg_add( &nb_threads, -1 );
ret = -1;
}
pthread_attr_destroy( &attr );
return ret;
}
/***********************************************************************
* init_current_teb
*
* Set the current TEB for a new thread.
*/
static void init_current_teb( struct wine_pthread_thread_info *info )
{
#ifdef __i386__
/* On the i386, the current thread is in the %fs register */
LDT_ENTRY fs_entry;
wine_ldt_set_base( &fs_entry, info->teb_base );
wine_ldt_set_limit( &fs_entry, info->teb_size - 1 );
wine_ldt_set_flags( &fs_entry, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT );
wine_ldt_init_fs( info->teb_sel, &fs_entry );
#else
if (!init_done) /* first thread */
pthread_key_create( &teb_key, NULL );
pthread_setspecific( teb_key, info->teb_base );
#endif
/* set pid and tid */
info->pid = getpid();
#ifdef __sun
info->tid = pthread_self(); /* this should return the lwp id on solaris */
#else
info->tid = gettid();
#endif
}
/***********************************************************************
* get_current_teb
*/
static void *get_current_teb(void)
{
#ifdef __i386__
void *ret;
__asm__( ".byte 0x64\n\tmovl 0x18,%0" : "=r" (ret) );
return ret;
#else
return pthread_getspecific( teb_key );
#endif
}
/***********************************************************************
* exit_thread
*/
static void DECLSPEC_NORETURN exit_thread( struct wine_pthread_thread_info *info )
{
if (interlocked_xchg_add( &nb_threads, -1 ) <= 1) exit( info->exit_status );
wine_ldt_free_fs( info->teb_sel );
if (info->teb_size) munmap( info->teb_base, info->teb_size );
pthread_exit( (void *)info->exit_status );
}
/***********************************************************************
* abort_thread
*/
static void DECLSPEC_NORETURN abort_thread( long status )
{
if (interlocked_xchg_add( &nb_threads, -1 ) <= 1) _exit( status );
pthread_exit( (void *)status );
}
/***********************************************************************
* pthread_functions
*/
const struct wine_pthread_functions pthread_functions =
{
init_process,
init_thread,
create_thread,
init_current_teb,
get_current_teb,
exit_thread,
abort_thread,
pthread_sigmask
};
#endif /* HAVE_PTHREAD_H */