uspace/libc/arch/ia32/include/thread.h

   1 /*
   2  * Copyright (c) 2006 Ondrej Palkovsky
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /** @addtogroup libcia32
  30  * @{
  31  */
  32 /** @file
  33  */
  34
  35 #ifndef LIBC_ia32_THREAD_H_
  36 #define LIBC_ia32_THREAD_H_
  37
  38 #include <libc.h>
  39
  40 typedef struct {
  41         void *self;
  42         void *pst_data;
  43 } tcb_t;
  44
  45 static inline void __tcb_set(tcb_t *tcb)
  46 {
  47         __SYSCALL1(SYS_TLS_SET, (sysarg_t) tcb);
  48 }
  49
  50 static inline tcb_t * __tcb_get(void)
  51 {
  52         void * retval;
  53
  54         __asm__ ("movl %%gs:0, %0" : "=r"(retval));
  55         return retval;
  56 }
  57
  58 #endif
  59
  60 /** @}
  61  */