wine/loader/glibc.c
Alexandre Julliard b1abca8a5d Initial version of the Wine preloader, used to reserve memory
areas at startup. Based on the work of Mike McCormack.
2004-05-28 20:59:22 +00:00

106 lines
2.8 KiB
C

/*
* glibc threading support
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_PTHREAD_H
# include <pthread.h>
#endif
#include "wine/library.h"
/* malloc wrapper */
static void *xmalloc( size_t size )
{
void *res;
if (!size) size = 1;
if (!(res = malloc( size )))
{
fprintf( stderr, "wine: virtual memory exhausted\n" );
exit(1);
}
return res;
}
/* separate thread to check for NPTL and TLS features */
static void *needs_pthread( void *arg )
{
pid_t tid = gettid();
/* check for NPTL */
if (tid != -1 && tid != getpid()) return (void *)1;
/* check for TLS glibc */
return (void *)(wine_get_gs() != 0);
}
/* return the name of the Wine threading variant to use */
static const char *get_threading(void)
{
pthread_t id;
void *ret;
pthread_create( &id, NULL, needs_pthread, NULL );
pthread_join( id, &ret );
return ret ? "wine-pthread" : "wine-kthread";
}
/**********************************************************************
* main
*/
int main( int argc, char *argv[] )
{
const char *loader = getenv( "WINELOADER" );
const char *threads = get_threading();
if (loader)
{
const char *path;
char *new_name, *new_loader;
if ((path = strrchr( loader, '/' ))) path++;
else path = loader;
new_name = xmalloc( (path - loader) + strlen(threads) + 1 );
memcpy( new_name, loader, path - loader );
strcpy( new_name + (path - loader), threads );
/* update WINELOADER with the new name */
new_loader = xmalloc( sizeof("WINELOADER=") + strlen(new_name) );
strcpy( new_loader, "WINELOADER=" );
strcat( new_loader, new_name );
putenv( new_loader );
wine_exec_wine_binary( new_name, argv, NULL, TRUE );
}
else
{
wine_init_argv0_path( argv[0] );
wine_exec_wine_binary( threads, argv, NULL, TRUE );
}
fprintf( stderr, "wine: could not exec %s\n", argv[0] );
exit(1);
}