开通博客赚积分
发布资源赚积分
分类

源码开发语言/平台
当前位置：首页 > 源码/资料 > 多媒体 > DVD > 查看源码
FX_ULSF.C
资源名称：tb_i86_wr_1019_1102.　[点击查看]
上传用户：super_houu
上传日期：2008-09-21
资源大小：4099k
文件大小：8k
源码类别：

DVD

开发平台：

Others

FX_ULSF.C：源码内容
  1. /**************************************************************************/ 
  2. /*                                                                        */ 
  3. /*            Copyright (c) 1996-2002 by Express Logic Inc.               */ 
  4. /*                                                                        */ 
  5. /*  This software is copyrighted by and is the sole property of Express   */ 
  6. /*  Logic, Inc.  All rights, title, ownership, or other interests         */ 
  7. /*  in the software remain the property of Express Logic, Inc.  This      */ 
  8. /*  software may only be used in accordance with the corresponding        */ 
  9. /*  license agreement.  Any unauthorized use, duplication, transmission,  */ 
  10. /*  distribution, or disclosure of this software is expressly forbidden.  */ 
  11. /*                                                                        */
  12. /*  This Copyright notice may not be removed or modified without prior    */ 
  13. /*  written consent of Express Logic, Inc.                                */ 
  14. /*                                                                        */ 
  15. /*  Express Logic, Inc. reserves the right to modify this software        */ 
  16. /*  without notice.                                                       */ 
  17. /*                                                                        */ 
  18. /*  Express Logic, Inc.                     info@expresslogic.com         */
  19. /*  11423 West Bernardo Court               http://www.expresslogic.com   */
  20. /*  San Diego, CA  92127                                                  */
  21. /*                                                                        */
  22. /**************************************************************************/
  25. /**************************************************************************/
  26. /**************************************************************************/
  27. /**                                                                       */ 
  28. /** FileX Component                                                       */ 
  29. /**                                                                       */
  30. /**   Utility (UTI)                                                       */
  31. /**                                                                       */
  32. /**************************************************************************/
  33. /**************************************************************************/
  35. #include "Config.h" // Global Configuration - do not remove!
  37. #ifdef ENABLE_FILEX
  39. #ifdef _DEBUG
  40. #undef IFTRACE
  41. #define IFTRACE if (gTraceFileSys)
  42. #include "DebugDbgMain.h"
  43. #endif //_DEBUG
  45. #define FX_SOURCE_CODE
  47. /* Include necessary system files.  */
  49. #include "PlaycoreFileSysFileXfx_api.h"
  50. #include "PlaycoreFileSysFileXfx_sys.h"
  51. #include "PlaycoreFileSysFileXfx_uti.h"
  53. /**************************************************************************/ 
  54. /*                                                                        */ 
  55. /*  FUNCTION                                               RELEASE        */ 
  56. /*                                                                        */ 
  57. /*    _fx_utility_log_sector_flush                        PORTABLE C      */ 
  58. /*                                                           3.0          */ 
  59. /*  AUTHOR                                                                */ 
  60. /*                                                                        */ 
  61. /*    William E. Lamie, Express Logic, Inc.                               */ 
  62. /*                                                                        */ 
  63. /*  DESCRIPTION                                                           */ 
  64. /*                                                                        */ 
  65. /*    This function handles logical sector flush requests for all FileX   */ 
  66. /*    components.  If the logical sector is currently marked as written,  */ 
  67. /*    it will be flushed to the media by this function and the written    */ 
  68. /*    flag is cleared.                                                    */ 
  69. /*                                                                        */ 
  70. /*    Note: Conversion of the logical sector is done inside the driver.   */ 
  71. /*          This results in a performance boost for FLASH or RAM media    */ 
  72. /*          devices.                                                      */ 
  73. /*                                                                        */ 
  74. /*  INPUT                                                                 */ 
  75. /*                                                                        */ 
  76. /*    media_ptr                             Media control block pointer   */ 
  77. /*                                                                        */ 
  78. /*  OUTPUT                                                                */ 
  79. /*                                                                        */ 
  80. /*    return status                                                       */ 
  81. /*                                                                        */ 
  82. /*  CALLS                                                                 */ 
  83. /*                                                                        */ 
  84. /*    I/O Driver                                                          */ 
  85. /*                                                                        */ 
  86. /*  CALLED BY                                                             */ 
  87. /*                                                                        */ 
  88. /*    FileX System Functions                                              */ 
  89. /*                                                                        */ 
  90. /*  RELEASE HISTORY                                                       */ 
  91. /*                                                                        */ 
  92. /*    DATE              NAME                      DESCRIPTION             */ 
  93. /*                                                                        */ 
  94. /*  01-01-1999     William E. Lamie         Initial Version 1.0           */ 
  95. /*  03-01-2000     William E. Lamie         Modified comment(s),          */ 
  96. /*                                            resulting in version 1.0b.  */ 
  97. /*  01-28-2001     William E. Lamie         Modified comment(s) and added */ 
  98. /*                                            logic to flush first cache  */ 
  99. /*                                            entry to the media,         */ 
  100. /*                                            resulting in version 2.0.   */ 
  101. /*  03-01-2002     William E. Lamie         Modified comment(s),          */ 
  102. /*                                            resulting in version 3.0.   */ 
  103. /*                                                                        */ 
  104. /**************************************************************************/ 
  105. UINT  _fx_utility_log_sector_flush(FX_MEDIA *media_ptr)
  106. {
  109.     /* Determine if the first cache entry in the internal FileX sector
  110.        cache has been modified.  */
  111.     if ((media_ptr -> fx_media_sector_cache_list_ptr) -> fx_cached_sector_buffer_dirty)
  112.     {
  114.         /* Build request to the driver.  */
  115.         media_ptr -> fx_media_driver_request =          FX_DRIVER_WRITE;
  116.         media_ptr -> fx_media_driver_status =           FX_IO_ERROR;
  117.         media_ptr -> fx_media_driver_buffer =           (media_ptr -> fx_media_sector_cache_list_ptr) -> fx_cached_sector_memory_buffer;
  118.         media_ptr -> fx_media_driver_logical_sector =   (media_ptr -> fx_media_sector_cache_list_ptr) -> fx_cached_sector;
  119.         media_ptr -> fx_media_driver_sectors =          1;
  121.         /* Invoke the driver to write the sector.  */
  122.         (media_ptr -> fx_media_driver_entry) (media_ptr);
  124.         /* Clear the written flag, if good status.  */
  125.         if (media_ptr -> fx_media_driver_status == FX_SUCCESS)
  126.         {
  128.             /* Clear the dirty flag. */
  129.             (media_ptr -> fx_media_sector_cache_list_ptr) -> fx_cached_sector_buffer_dirty =  FX_FALSE;
  130.         }
  132.         /* Return a driver status.  */
  133.         return(media_ptr -> fx_media_driver_status);
  134.     }
  136.     /* Return successful status.  */
  137.     return(FX_SUCCESS);
  138. }
  140. #endif