share.h 2.3 KB

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667
  1. /* $Id: share.h,v 1.3 2002/06/21 15:53:32 dijkstra Exp $ */
  2. /*
  3. * Copyright (c) 2001-2002 Willem Dijkstra
  4. * All rights reserved.
  5. *
  6. * Redistribution and use in source and binary forms, with or without
  7. * modification, are permitted provided that the following conditions
  8. * are met:
  9. *
  10. * - Redistributions of source code must retain the above copyright
  11. * notice, this list of conditions and the following disclaimer.
  12. * - Redistributions in binary form must reproduce the above
  13. * copyright notice, this list of conditions and the following
  14. * disclaimer in the documentation and/or other materials provided
  15. * with the distribution.
  16. *
  17. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  19. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  20. * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  21. * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  22. * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  23. * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  24. * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  25. * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  27. * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28. * POSSIBILITY OF SUCH DAMAGE.
  29. *
  30. */
  31. /* TODO:
  32. * Dynamically allocate buffer size
  33. * Check wether one buffer suffices, do some performance tests
  34. */
  35. #ifndef _MONMUX_SHARE_H
  36. #define _MONMUX_SHARE_H
  37. #include "data.h"
  38. /* Share contains all routines needed for the ipc between monmuxes */
  39. #define SEM_WAIT 0 /* wait semaphore */
  40. #define SEM_READ 1 /* have read semaphore */
  41. #define SEM_TOTAL 2
  42. struct sharedregion {
  43. long seqnr;
  44. long reglen; /* size of buffer */
  45. long ctlen; /* amount of content in buffer, assert(< size) */
  46. long data;
  47. };
  48. /* prototypes */
  49. __BEGIN_DECLS
  50. void master_forbidread();
  51. void master_permitread();
  52. long shared_getlen();
  53. long shared_getmaxlen();
  54. long *shared_getmem();
  55. void initshare();
  56. void shared_setlen(long);
  57. void spawn_client(int);
  58. __END_DECLS
  59. #endif /*_MONMUX_SHARE_H*/