1#if !defined(_FX_JPEG_TURBO_) 2/* 3 * jmemnobs.c 4 * 5 * Copyright (C) 1992-1996, Thomas G. Lane. 6 * This file is part of the Independent JPEG Group's software. 7 * For conditions of distribution and use, see the accompanying README file. 8 * 9 * This file provides a really simple implementation of the system- 10 * dependent portion of the JPEG memory manager. This implementation 11 * assumes that no backing-store files are needed: all required space 12 * can be obtained from malloc(). 13 * This is very portable in the sense that it'll compile on almost anything, 14 * but you'd better have lots of main memory (or virtual memory) if you want 15 * to process big images. 16 * Note that the max_memory_to_use option is ignored by this implementation. 17 */ 18 19#define JPEG_INTERNALS 20#include "jinclude.h" 21#include "jpeglib.h" 22#include "jmemsys.h" /* import the system-dependent declarations */ 23 24#ifndef HAVE_STDLIB_H /* <stdlib.h> should declare malloc(),free() */ 25extern void * malloc JPP((size_t size)); 26extern void free JPP((void *ptr)); 27#endif 28 29#if defined(_FX_MANAGED_CODE_) && defined(__cplusplus) 30extern "C" { 31#endif 32 33void* FXMEM_DefaultAlloc(int byte_size, int); 34void FXMEM_DefaultFree(void* pointer, int); 35 36#if defined(_FX_MANAGED_CODE_) && defined(__cplusplus) 37} 38#endif 39 40/* 41 * Memory allocation and freeing are controlled by the regular library 42 * routines malloc() and free(). 43 */ 44 45GLOBAL(void *) 46jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject) 47{ 48// return (void *) malloc(sizeofobject); 49 return FXMEM_DefaultAlloc(sizeofobject, 0); 50} 51 52GLOBAL(void) 53jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject) 54{ 55// free(object); 56 FXMEM_DefaultFree(object, 0); 57} 58 59 60/* 61 * "Large" objects are treated the same as "small" ones. 62 * NB: although we include FAR keywords in the routine declarations, 63 * this file won't actually work in 80x86 small/medium model; at least, 64 * you probably won't be able to process useful-size images in only 64KB. 65 */ 66 67GLOBAL(void FAR *) 68jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject) 69{ 70// return (void FAR *) malloc(sizeofobject); 71 return FXMEM_DefaultAlloc(sizeofobject, 0); 72} 73 74GLOBAL(void) 75jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject) 76{ 77// free(object); 78 FXMEM_DefaultFree(object, 0); 79} 80 81 82/* 83 * This routine computes the total memory space available for allocation. 84 * Here we always say, "we got all you want bud!" 85 */ 86 87GLOBAL(long) 88jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed, 89 long max_bytes_needed, long already_allocated) 90{ 91 return max_bytes_needed; 92} 93 94 95/* 96 * Backing store (temporary file) management. 97 * Since jpeg_mem_available always promised the moon, 98 * this should never be called and we can just error out. 99 */ 100 101GLOBAL(void) 102jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info, 103 long total_bytes_needed) 104{ 105 ERREXIT(cinfo, JERR_NO_BACKING_STORE); 106} 107 108 109/* 110 * These routines take care of any system-dependent initialization and 111 * cleanup required. Here, there isn't any. 112 */ 113 114GLOBAL(long) 115jpeg_mem_init (j_common_ptr cinfo) 116{ 117 return 0; /* just set max_memory_to_use to 0 */ 118} 119 120GLOBAL(void) 121jpeg_mem_term (j_common_ptr cinfo) 122{ 123 /* no work */ 124} 125 126#endif //_FX_JPEG_TURBO_ 127