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  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. #ifndef __LIBC__PSTHREAD_H__
  30. #define __LIBC__PSTHREAD_H__
  31.  
  32. #include <libarch/psthread.h>
  33. #include <libadt/list.h>
  34.  
  35. #ifndef context_set
  36. #define context_set(c, _pc, stack, size, ptls)  \
  37.     (c)->pc = (sysarg_t) (_pc);     \
  38.     (c)->sp = ((sysarg_t) (stack)) + (size) - SP_DELTA; \
  39.         (c)->tls = (sysarg_t) (ptls);
  40. #endif /* context_set */
  41.  
  42. typedef sysarg_t pstid_t;
  43.  
  44. struct psthread_data {
  45.     struct psthread_data *self; /* IA32,AMD64 needs to get self address */
  46.  
  47.     link_t list;
  48.     context_t ctx;
  49.     void *stack;
  50.     void *arg;
  51.     int (*func)(void *);
  52.  
  53.     struct psthread_data *waiter;
  54.     int finished;
  55.     int retval;
  56.     int flags;
  57. };
  58. typedef struct psthread_data psthread_data_t;
  59.  
  60. extern int context_save(context_t *c);
  61. extern void context_restore(context_t *c) __attribute__ ((noreturn));
  62.  
  63. pstid_t psthread_create(int (*func)(void *), void *arg);
  64. int ps_preempt(void);
  65. int ps_join(pstid_t psthrid);
  66.  
  67. #endif
  68.