Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 1 | /* |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 2 | * jmemnobs.c |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 3 | * |
DRC | 5033f3e | 2014-05-18 18:33:44 +0000 | [diff] [blame] | 4 | * This file was part of the Independent JPEG Group's software: |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 5 | * Copyright (C) 1992-1996, Thomas G. Lane. |
DRC | da2a27e | 2017-03-18 16:15:14 -0500 | [diff] [blame] | 6 | * libjpeg-turbo Modifications: |
DRC | 4a275cf | 2018-03-31 21:48:20 -0500 | [diff] [blame] | 7 | * Copyright (C) 2017-2018, D. R. Commander. |
DRC | 7e3acc0 | 2015-10-10 10:25:46 -0500 | [diff] [blame] | 8 | * For conditions of distribution and use, see the accompanying README.ijg |
| 9 | * file. |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 10 | * |
| 11 | * This file provides a really simple implementation of the system- |
| 12 | * dependent portion of the JPEG memory manager. This implementation |
| 13 | * assumes that no backing-store files are needed: all required space |
| 14 | * can be obtained from malloc(). |
| 15 | * This is very portable in the sense that it'll compile on almost anything, |
| 16 | * but you'd better have lots of main memory (or virtual memory) if you want |
| 17 | * to process big images. |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 18 | */ |
| 19 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 20 | #define JPEG_INTERNALS |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 21 | #include "jinclude.h" |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 22 | #include "jpeglib.h" |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 23 | #include "jmemsys.h" /* import the system-dependent declarations */ |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 24 | |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 25 | |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 26 | /* |
| 27 | * Memory allocation and freeing are controlled by the regular library |
| 28 | * routines malloc() and free(). |
| 29 | */ |
| 30 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 31 | GLOBAL(void *) |
DRC | 19c791c | 2018-03-08 10:55:20 -0600 | [diff] [blame] | 32 | jpeg_get_small(j_common_ptr cinfo, size_t sizeofobject) |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 33 | { |
DRC | 19c791c | 2018-03-08 10:55:20 -0600 | [diff] [blame] | 34 | return (void *)malloc(sizeofobject); |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 35 | } |
| 36 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 37 | GLOBAL(void) |
DRC | 19c791c | 2018-03-08 10:55:20 -0600 | [diff] [blame] | 38 | jpeg_free_small(j_common_ptr cinfo, void *object, size_t sizeofobject) |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 39 | { |
| 40 | free(object); |
| 41 | } |
| 42 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 43 | |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 44 | /* |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 45 | * "Large" objects are treated the same as "small" ones. |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 46 | */ |
| 47 | |
DRC | 5033f3e | 2014-05-18 18:33:44 +0000 | [diff] [blame] | 48 | GLOBAL(void *) |
DRC | 19c791c | 2018-03-08 10:55:20 -0600 | [diff] [blame] | 49 | jpeg_get_large(j_common_ptr cinfo, size_t sizeofobject) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 50 | { |
DRC | 19c791c | 2018-03-08 10:55:20 -0600 | [diff] [blame] | 51 | return (void *)malloc(sizeofobject); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 52 | } |
| 53 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 54 | GLOBAL(void) |
DRC | 19c791c | 2018-03-08 10:55:20 -0600 | [diff] [blame] | 55 | jpeg_free_large(j_common_ptr cinfo, void *object, size_t sizeofobject) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 56 | { |
| 57 | free(object); |
| 58 | } |
| 59 | |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 60 | |
| 61 | /* |
| 62 | * This routine computes the total memory space available for allocation. |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 63 | */ |
| 64 | |
DRC | 0489909 | 2010-02-26 23:01:19 +0000 | [diff] [blame] | 65 | GLOBAL(size_t) |
DRC | 19c791c | 2018-03-08 10:55:20 -0600 | [diff] [blame] | 66 | jpeg_mem_available(j_common_ptr cinfo, size_t min_bytes_needed, |
| 67 | size_t max_bytes_needed, size_t already_allocated) |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 68 | { |
DRC | da2a27e | 2017-03-18 16:15:14 -0500 | [diff] [blame] | 69 | if (cinfo->mem->max_memory_to_use) { |
DRC | 4a275cf | 2018-03-31 21:48:20 -0500 | [diff] [blame] | 70 | if ((size_t)cinfo->mem->max_memory_to_use > already_allocated) |
DRC | da2a27e | 2017-03-18 16:15:14 -0500 | [diff] [blame] | 71 | return cinfo->mem->max_memory_to_use - already_allocated; |
| 72 | else |
| 73 | return 0; |
| 74 | } else { |
| 75 | /* Here we always say, "we got all you want bud!" */ |
| 76 | return max_bytes_needed; |
| 77 | } |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 78 | } |
| 79 | |
| 80 | |
| 81 | /* |
| 82 | * Backing store (temporary file) management. |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 83 | * Since jpeg_mem_available always promised the moon, |
| 84 | * this should never be called and we can just error out. |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 85 | */ |
| 86 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 87 | GLOBAL(void) |
DRC | 19c791c | 2018-03-08 10:55:20 -0600 | [diff] [blame] | 88 | jpeg_open_backing_store(j_common_ptr cinfo, backing_store_ptr info, |
| 89 | long total_bytes_needed) |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 90 | { |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 91 | ERREXIT(cinfo, JERR_NO_BACKING_STORE); |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | |
| 95 | /* |
| 96 | * These routines take care of any system-dependent initialization and |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 97 | * cleanup required. Here, there isn't any. |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 98 | */ |
| 99 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 100 | GLOBAL(long) |
DRC | 19c791c | 2018-03-08 10:55:20 -0600 | [diff] [blame] | 101 | jpeg_mem_init(j_common_ptr cinfo) |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 102 | { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 103 | return 0; /* just set max_memory_to_use to 0 */ |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 104 | } |
| 105 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 106 | GLOBAL(void) |
DRC | 19c791c | 2018-03-08 10:55:20 -0600 | [diff] [blame] | 107 | jpeg_mem_term(j_common_ptr cinfo) |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 108 | { |
| 109 | /* no work */ |
| 110 | } |