loader/pthread.c

   1 /*
   2  * Wine threading routines using the pthread library
   3  *
   4  * Copyright 2003 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #ifdef HAVE_PTHREAD_H
  25
  26 #include <assert.h>
  27 #include <stdlib.h>
  28 #include <signal.h>
  29 #ifdef HAVE_UNISTD_H
  30 # include <unistd.h>
  31 #endif
  32 #include <string.h>
  33 #include <sys/types.h>
  34 #ifdef HAVE_SYS_MMAN_H
  35 #include <sys/mman.h>
  36 #endif
  37
  38 #include "wine/library.h"
  39 #include "wine/pthread.h"
  40
  41 static struct wine_pthread_functions funcs;
  42
  43 #ifndef __i386__
  44 static pthread_key_t teb_key;
  45 #endif
  46
  47 /***********************************************************************
  48  *           wine_pthread_init_process
  49  *
  50  * Initialization for a newly created process.
  51  */
  52 void wine_pthread_init_process( const struct wine_pthread_functions *functions )
  53 {
  54     memcpy( &funcs, functions, min(functions->size,sizeof(funcs)) );
  55 }
  56
  57
  58 /***********************************************************************
  59  *           wine_pthread_init_thread
  60  *
  61  * Initialization for a newly created thread.
  62  */
  63 void wine_pthread_init_thread( struct wine_pthread_thread_info *info )
  64 {
  65     /* retrieve the stack info (except for main thread) */
  66     if (funcs.ptr_set_thread_data)
  67     {
  68 #ifdef HAVE_PTHREAD_GETATTR_NP
  69         pthread_attr_t attr;
  70         pthread_getattr_np( pthread_self(), &attr );
  71         pthread_attr_getstack( &attr, &info->stack_base, &info->stack_size );
  72 #else
  73         /* assume that the stack allocation is page aligned */
  74         char dummy;
  75         size_t page_mask = getpagesize() - 1;
  76         char *stack_top = (char *)((unsigned long)(&dummy + page_mask) & ~page_mask);
  77         info->stack_base = stack_top - info->stack_size;
  78 #endif
  79     }
  80 }
  81
  82
  83 /***********************************************************************
  84  *           wine_pthread_create_thread
  85  */
  86 int wine_pthread_create_thread( struct wine_pthread_thread_info *info )
  87 {
  88     pthread_t id;
  89     pthread_attr_t attr;
  90     int ret = 0;
  91
  92     pthread_attr_init( &attr );
  93     pthread_attr_setstacksize( &attr, info->stack_size );
  94     if (pthread_create( &id, &attr, (void * (*)(void *))info->entry, info )) ret = -1;
  95     pthread_attr_destroy( &attr );
  96     return ret;
  97 }
  98
  99
 100 /***********************************************************************
 101  *           wine_pthread_init_current_teb
 102  *
 103  * Set the current TEB for a new thread.
 104  */
 105 void wine_pthread_init_current_teb( struct wine_pthread_thread_info *info )
 106 {
 107 #ifdef __i386__
 108     /* On the i386, the current thread is in the %fs register */
 109     LDT_ENTRY fs_entry;
 110
 111     wine_ldt_set_base( &fs_entry, info->teb_base );
 112     wine_ldt_set_limit( &fs_entry, info->teb_size - 1 );
 113     wine_ldt_set_flags( &fs_entry, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT );
 114     wine_ldt_init_fs( info->teb_sel, &fs_entry );
 115 #else
 116     if (!funcs.ptr_set_thread_data)  /* first thread */
 117         pthread_key_create( &teb_key, NULL );
 118     pthread_setspecific( teb_key, info->teb_base );
 119 #endif
 120
 121     /* set pid and tid */
 122     info->pid = getpid();
 123     info->tid = gettid();
 124 }
 125
 126
 127 /***********************************************************************
 128  *           wine_pthread_get_current_teb
 129  */
 130 void *wine_pthread_get_current_teb(void)
 131 {
 132 #ifdef __i386__
 133     void *ret;
 134     __asm__( ".byte 0x64\n\tmovl 0x18,%0" : "=r" (ret) );
 135     return ret;
 136 #else
 137     return pthread_getspecific( teb_key );
 138 #endif
 139 }
 140
 141
 142 /***********************************************************************
 143  *           wine_pthread_exit_thread
 144  */
 145 void wine_pthread_exit_thread( struct wine_pthread_thread_info *info )
 146 {
 147     struct cleanup_info
 148     {
 149         pthread_t self;
 150         struct wine_pthread_thread_info thread_info;
 151     };
 152
 153     static struct cleanup_info *previous_info;
 154     struct cleanup_info *cleanup_info, *free_info;
 155     void *ptr;
 156
 157     /* store it at the end of the TEB structure */
 158     cleanup_info = (struct cleanup_info *)((char *)info->teb_base + info->teb_size) - 1;
 159     cleanup_info->self = pthread_self();
 160     cleanup_info->thread_info = *info;
 161
 162     if ((free_info = interlocked_xchg_ptr( (void **)&previous_info, cleanup_info )) != NULL)
 163     {
 164         pthread_join( free_info->self, &ptr );
 165         wine_ldt_free_fs( free_info->thread_info.teb_sel );
 166         munmap( free_info->thread_info.teb_base, free_info->thread_info.teb_size );
 167     }
 168     pthread_exit( (void *)info->exit_status );
 169 }
 170
 171
 172 /***********************************************************************
 173  *           wine_pthread_abort_thread
 174  */
 175 void wine_pthread_abort_thread( int status )
 176 {
 177     pthread_detach( pthread_self() );  /* no one will be joining with us */
 178     pthread_exit( (void *)status );
 179 }
 180
 181 #endif  /* HAVE_PTHREAD_H */