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 | * |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame^] | 4 | * Copyright (C) 1992-1996, Thomas G. Lane. |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 5 | * This file is part of the Independent JPEG Group's software. |
| 6 | * For conditions of distribution and use, see the accompanying README file. |
| 7 | * |
| 8 | * This file provides a really simple implementation of the system- |
| 9 | * dependent portion of the JPEG memory manager. This implementation |
| 10 | * assumes that no backing-store files are needed: all required space |
| 11 | * can be obtained from malloc(). |
| 12 | * This is very portable in the sense that it'll compile on almost anything, |
| 13 | * but you'd better have lots of main memory (or virtual memory) if you want |
| 14 | * to process big images. |
| 15 | * Note that the max_memory_to_use option is ignored by this implementation. |
| 16 | */ |
| 17 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 18 | #define JPEG_INTERNALS |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 19 | #include "jinclude.h" |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 20 | #include "jpeglib.h" |
| 21 | #include "jmemsys.h" /* import the system-dependent declarations */ |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 22 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 23 | #ifndef HAVE_STDLIB_H /* <stdlib.h> should declare malloc(),free() */ |
| 24 | extern void * malloc JPP((size_t size)); |
| 25 | extern void free JPP((void *ptr)); |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 26 | #endif |
| 27 | |
| 28 | |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 29 | /* |
| 30 | * Memory allocation and freeing are controlled by the regular library |
| 31 | * routines malloc() and free(). |
| 32 | */ |
| 33 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame^] | 34 | GLOBAL(void *) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 35 | jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject) |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 36 | { |
| 37 | return (void *) malloc(sizeofobject); |
| 38 | } |
| 39 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame^] | 40 | GLOBAL(void) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 41 | 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] | 42 | { |
| 43 | free(object); |
| 44 | } |
| 45 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 46 | |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 47 | /* |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 48 | * "Large" objects are treated the same as "small" ones. |
| 49 | * NB: although we include FAR keywords in the routine declarations, |
| 50 | * this file won't actually work in 80x86 small/medium model; at least, |
| 51 | * you probably won't be able to process useful-size images in only 64KB. |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 52 | */ |
| 53 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame^] | 54 | GLOBAL(void FAR *) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 55 | jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject) |
| 56 | { |
| 57 | return (void FAR *) malloc(sizeofobject); |
| 58 | } |
| 59 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame^] | 60 | GLOBAL(void) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 61 | jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject) |
| 62 | { |
| 63 | free(object); |
| 64 | } |
| 65 | |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 66 | |
| 67 | /* |
| 68 | * This routine computes the total memory space available for allocation. |
| 69 | * Here we always say, "we got all you want bud!" |
| 70 | */ |
| 71 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame^] | 72 | GLOBAL(long) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 73 | jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed, |
| 74 | long max_bytes_needed, long already_allocated) |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 75 | { |
| 76 | return max_bytes_needed; |
| 77 | } |
| 78 | |
| 79 | |
| 80 | /* |
| 81 | * Backing store (temporary file) management. |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 82 | * Since jpeg_mem_available always promised the moon, |
| 83 | * this should never be called and we can just error out. |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 84 | */ |
| 85 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame^] | 86 | GLOBAL(void) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 87 | jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info, |
| 88 | long total_bytes_needed) |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 89 | { |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 90 | ERREXIT(cinfo, JERR_NO_BACKING_STORE); |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 91 | } |
| 92 | |
| 93 | |
| 94 | /* |
| 95 | * These routines take care of any system-dependent initialization and |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 96 | * cleanup required. Here, there isn't any. |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 97 | */ |
| 98 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame^] | 99 | GLOBAL(long) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 100 | jpeg_mem_init (j_common_ptr cinfo) |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 101 | { |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 102 | return 0; /* just set max_memory_to_use to 0 */ |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 103 | } |
| 104 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame^] | 105 | GLOBAL(void) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 106 | jpeg_mem_term (j_common_ptr cinfo) |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 107 | { |
| 108 | /* no work */ |
| 109 | } |