pt-machine.h 2.9 KB

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  1. /* Machine-dependent pthreads configuration and inline functions.
  2. sparc version.
  3. Copyright (C) 1996-1998, 2000-2003 Free Software Foundation, Inc.
  4. This file is part of the GNU C Library.
  5. Contributed by Richard Henderson <rth@tamu.edu>.
  6. The GNU C Library is free software; you can redistribute it and/or
  7. modify it under the terms of the GNU Lesser General Public License as
  8. published by the Free Software Foundation; either version 2.1 of the
  9. License, or (at your option) any later version.
  10. The GNU C Library is distributed in the hope that it will be useful,
  11. but WITHOUT ANY WARRANTY; without even the implied warranty of
  12. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13. Lesser General Public License for more details.
  14. You should have received a copy of the GNU Lesser General Public
  15. License along with the GNU C Library; see the file COPYING.LIB. If not,
  16. write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17. Boston, MA 02111-1307, USA. */
  18. #ifndef _PT_MACHINE_H
  19. #define _PT_MACHINE_H 1
  20. #ifndef PT_EI
  21. # define PT_EI __extern_always_inline
  22. #endif
  23. extern long int testandset (int *spinlock);
  24. extern int __compare_and_swap (long int *p, long int oldval, long int newval);
  25. /* Spinlock implementation; required. */
  26. PT_EI long int
  27. testandset (int *spinlock)
  28. {
  29. int ret;
  30. __asm__ __volatile__("ldstub %1,%0"
  31. : "=r"(ret), "=m"(*spinlock)
  32. : "m"(*spinlock));
  33. return ret;
  34. }
  35. /* Memory barrier; default is to do nothing */
  36. #define MEMORY_BARRIER() __asm__ __volatile__("stbar" : : : "memory")
  37. /* Get some notion of the current stack. Need not be exactly the top
  38. of the stack, just something somewhere in the current frame. */
  39. #define CURRENT_STACK_FRAME (stack_pointer + (2 * 64))
  40. register char *stack_pointer __asm__("%sp");
  41. /* Registers %g6 and %g7 are reserved by the ABI for "system use".
  42. %g7 is specified in the TLS ABI as thread pointer -- we do the same. */
  43. struct _pthread_descr_struct;
  44. register struct _pthread_descr_struct *__thread_self __asm__("%g7");
  45. /* Return the thread descriptor for the current thread. */
  46. #define THREAD_SELF __thread_self
  47. /* Initialize the thread-unique value. */
  48. #define INIT_THREAD_SELF(descr, nr) (__thread_self = (descr))
  49. /* Access to data in the thread descriptor is easy. */
  50. #define THREAD_GETMEM(descr, member) \
  51. ((void) sizeof (descr), THREAD_SELF->member)
  52. #define THREAD_GETMEM_NC(descr, member) \
  53. ((void) sizeof (descr), THREAD_SELF->member)
  54. #define THREAD_SETMEM(descr, member, value) \
  55. ((void) sizeof (descr), THREAD_SELF->member = (value))
  56. #define THREAD_SETMEM_NC(descr, member, value) \
  57. ((void) sizeof (descr), THREAD_SELF->member = (value))
  58. /* We want the OS to assign stack addresses. */
  59. #define FLOATING_STACKS 1
  60. /* Maximum size of the stack if the rlimit is unlimited. */
  61. #define ARCH_STACK_MAX_SIZE 8*1024*1024
  62. #endif /* pt-machine.h */