firmware/core_alloc.c

   1
   2 #include "config.h"
   3 #include <string.h>
   4 #include "system.h"
   5 #include "core_alloc.h"
   6 #include "buflib.h"
   7
   8 /* not static so it can be discovered by core_get_data() */
   9 struct buflib_context core_ctx;
  10
  11 /* defined in linker script */
  12 #if (CONFIG_PLATFORM & PLATFORM_NATIVE)
  13 #if defined(IPOD_VIDEO) && !defined(BOOTLOADER)
  14 extern unsigned char *audiobufend_lds[];
  15 unsigned char *audiobufend;
  16 #else /* !IPOD_VIDEO */
  17 extern unsigned char audiobufend[];
  18 #endif
  19 /* defined in linker script */
  20 extern unsigned char audiobuffer[];
  21 #else /* PLATFORM_HOSTED */
  22 unsigned char audiobuffer[(MEMORYSIZE*1024-256)*1024];
  23 unsigned char *audiobufend = audiobuffer + sizeof(audiobuffer);
  24 extern unsigned char *audiobufend;
  25 #endif
  26
  27 /* debug test alloc */
  28 static int test_alloc;
  29 void core_allocator_init(void)
  30 {
  31     unsigned char *start = ALIGN_UP(audiobuffer, sizeof(intptr_t));
  32
  33 #if defined(IPOD_VIDEO) && !defined(BOOTLOADER) && !defined(SIMULATOR)
  34     audiobufend=(unsigned char *)audiobufend_lds;
  35     if(MEMORYSIZE==64 && probed_ramsize!=64)
  36     {
  37         audiobufend -= (32<<20);
  38     }
  39 #endif
  40
  41     buflib_init(&core_ctx, start, audiobufend - start);
  42
  43     test_alloc = core_alloc("test", 112);
  44 }
  45
  46 bool core_test_free(void)
  47 {
  48     bool ret = test_alloc > 0;
  49     if (ret)
  50         test_alloc = core_free(test_alloc);
  51
  52     return ret;
  53 }
  54
  55 int core_alloc(const char* name, size_t size)
  56 {
  57     return buflib_alloc_ex(&core_ctx, size, name, NULL);
  58 }
  59
  60 int core_alloc_ex(const char* name, size_t size, struct buflib_callbacks *ops)
  61 {
  62     return buflib_alloc_ex(&core_ctx, size, name, ops);
  63 }
  64
  65 size_t core_available(void)
  66 {
  67     return buflib_available(&core_ctx);
  68 }
  69
  70 int core_free(int handle)
  71 {
  72     return buflib_free(&core_ctx, handle);
  73 }
  74
  75 int core_alloc_maximum(const char* name, size_t *size, struct buflib_callbacks *ops)
  76 {
  77     return buflib_alloc_maximum(&core_ctx, name, size, ops);
  78 }
  79
  80 bool core_shrink(int handle, void* new_start, size_t new_size)
  81 {
  82     return buflib_shrink(&core_ctx, handle, new_start, new_size);
  83 }
  84
  85 int core_get_num_blocks(void)
  86 {
  87     return buflib_get_num_blocks(&core_ctx);
  88 }
  89
  90 void core_print_block_at(int block_num, char* buf, size_t bufsize)
  91 {
  92     buflib_print_block_at(&core_ctx, block_num, buf, bufsize);
  93 }