fx_media_extended_space_available.c
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|---|---|---|---|
| 1 | /*************************************************************************** | ||
| 2 | * Copyright (c) 2024 Microsoft Corporation | ||
| 3 | * Copyright (c) 2026-present Eclipse ThreadX contributors | ||
| 4 | * | ||
| 5 | * This program and the accompanying materials are made available under the | ||
| 6 | * terms of the MIT License which is available at | ||
| 7 | * https://opensource.org/licenses/MIT. | ||
| 8 | * | ||
| 9 | * SPDX-License-Identifier: MIT | ||
| 10 | **************************************************************************/ | ||
| 11 | |||
| 12 | |||
| 13 | /**************************************************************************/ | ||
| 14 | /**************************************************************************/ | ||
| 15 | /** */ | ||
| 16 | /** FileX Component */ | ||
| 17 | /** */ | ||
| 18 | /** Media */ | ||
| 19 | /** */ | ||
| 20 | /**************************************************************************/ | ||
| 21 | /**************************************************************************/ | ||
| 22 | |||
| 23 | #define FX_SOURCE_CODE | ||
| 24 | |||
| 25 | |||
| 26 | /* Include necessary system files. */ | ||
| 27 | |||
| 28 | #include "fx_api.h" | ||
| 29 | #include "fx_system.h" | ||
| 30 | #include "fx_media.h" | ||
| 31 | |||
| 32 | |||
| 33 | /**************************************************************************/ | ||
| 34 | /* */ | ||
| 35 | /* FUNCTION RELEASE */ | ||
| 36 | /* */ | ||
| 37 | /* _fx_media_extended_space_available PORTABLE C */ | ||
| 38 | /* 6.1 */ | ||
| 39 | /* AUTHOR */ | ||
| 40 | /* */ | ||
| 41 | /* William E. Lamie, Microsoft Corporation */ | ||
| 42 | /* */ | ||
| 43 | /* DESCRIPTION */ | ||
| 44 | /* */ | ||
| 45 | /* This function returns the number of bytes available in the */ | ||
| 46 | /* specified media. */ | ||
| 47 | /* */ | ||
| 48 | /* INPUT */ | ||
| 49 | /* */ | ||
| 50 | /* media_ptr Media control block pointer */ | ||
| 51 | /* available_bytes_ptr Pointer to available bytes */ | ||
| 52 | /* destination */ | ||
| 53 | /* */ | ||
| 54 | /* OUTPUT */ | ||
| 55 | /* */ | ||
| 56 | /* return status */ | ||
| 57 | /* */ | ||
| 58 | /* CALLS */ | ||
| 59 | /* */ | ||
| 60 | /* None */ | ||
| 61 | /* */ | ||
| 62 | /* CALLED BY */ | ||
| 63 | /* */ | ||
| 64 | /* Application Code */ | ||
| 65 | /* */ | ||
| 66 | /**************************************************************************/ | ||
| 67 | 14483 | UINT _fx_media_extended_space_available(FX_MEDIA *media_ptr, ULONG64 *available_bytes_ptr) | |
| 68 | { | ||
| 69 | |||
| 70 | ULONG64 available_bytes; | ||
| 71 | ULONG bytes_per_cluster; | ||
| 72 | ULONG available_clusters; | ||
| 73 | |||
| 74 | |||
| 75 | /* Check the media to make sure it is open. */ | ||
| 76 |
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14483 | if (media_ptr -> fx_media_id != FX_MEDIA_ID) |
| 77 | { | ||
| 78 | |||
| 79 | /* Return the media not opened error. */ | ||
| 80 | 1389 | return(FX_MEDIA_NOT_OPEN); | |
| 81 | } | ||
| 82 | |||
| 83 | /* If trace is enabled, insert this event into the trace buffer. */ | ||
| 84 | FX_TRACE_IN_LINE_INSERT(FX_TRACE_MEDIA_SPACE_AVAILABLE, media_ptr, available_bytes_ptr, media_ptr -> fx_media_available_clusters, 0, FX_TRACE_MEDIA_EVENTS, 0, 0) | ||
| 85 | |||
| 86 | /* Protect against other threads accessing the media. */ | ||
| 87 | 6560 | FX_PROTECT | |
| 88 | |||
| 89 | /* Pickup the number of free clusters. */ | ||
| 90 | 13094 | available_clusters = media_ptr -> fx_media_available_clusters; | |
| 91 | |||
| 92 | /* Derive the bytes per cluster. */ | ||
| 93 | 13094 | bytes_per_cluster = media_ptr -> fx_media_bytes_per_sector * media_ptr -> fx_media_sectors_per_cluster; | |
| 94 | |||
| 95 | /* Calculate the free space. */ | ||
| 96 | 13094 | available_bytes = ((ULONG64)available_clusters) * ((ULONG64)bytes_per_cluster); | |
| 97 | |||
| 98 | /* Return the value. */ | ||
| 99 | 13094 | *available_bytes_ptr = available_bytes; | |
| 100 | |||
| 101 | /* Release media protection. */ | ||
| 102 | 6560 | FX_UNPROTECT | |
| 103 | |||
| 104 | /* Return a successful status to the caller. */ | ||
| 105 | 13094 | return(FX_SUCCESS); | |
| 106 | } | ||
| 107 | |||
| 108 |