nx_lower.c 3.0 KB

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879
  1. /****************************************************************************
  2. * libs/libnx/nxmu/nx_lower.c
  3. *
  4. * Copyright (C) 2008-2009, 2011-2013 Gregory Nutt. All rights reserved.
  5. * Author: Gregory Nutt <gnutt@nuttx.org>
  6. *
  7. * Redistribution and use in source and binary forms, with or without
  8. * modification, are permitted provided that the following conditions
  9. * are met:
  10. *
  11. * 1. Redistributions of source code must retain the above copyright
  12. * notice, this list of conditions and the following disclaimer.
  13. * 2. Redistributions in binary form must reproduce the above copyright
  14. * notice, this list of conditions and the following disclaimer in
  15. * the documentation and/or other materials provided with the
  16. * distribution.
  17. * 3. Neither the name NuttX nor the names of its contributors may be
  18. * used to endorse or promote products derived from this software
  19. * without specific prior written permission.
  20. *
  21. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24. * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  25. * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26. * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27. * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
  28. * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29. * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  31. * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  32. * POSSIBILITY OF SUCH DAMAGE.
  33. *
  34. ****************************************************************************/
  35. /****************************************************************************
  36. * Included Files
  37. ****************************************************************************/
  38. #include <nuttx/config.h>
  39. #include <errno.h>
  40. #include <debug.h>
  41. #include <nuttx/nx/nx.h>
  42. #include <nuttx/nx/nxbe.h>
  43. #include <nuttx/nx/nxmu.h>
  44. /****************************************************************************
  45. * Public Functions
  46. ****************************************************************************/
  47. /****************************************************************************
  48. * Name: nx_raise
  49. *
  50. * Description:
  51. * Lower the specified window to the bottom of the display.
  52. *
  53. * Input Parameters:
  54. * hwnd - the window to be lowered
  55. *
  56. * Returned Value:
  57. * OK on success; ERROR on failure with errno set appropriately
  58. *
  59. ****************************************************************************/
  60. int nx_lower(NXWINDOW hwnd)
  61. {
  62. FAR struct nxbe_window_s *wnd = (FAR struct nxbe_window_s *)hwnd;
  63. struct nxsvrmsg_lower_s outmsg;
  64. /* Send the RAISE message */
  65. outmsg.msgid = NX_SVRMSG_LOWER;
  66. outmsg.wnd = wnd;
  67. return nxmu_sendwindow(wnd, &outmsg, sizeof(struct nxsvrmsg_lower_s));
  68. }