src/surf/storage.c

   1 /* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012. The SimGrid Team.
   2  * All rights reserved.                                                                 */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package.             */
   6
   7 #include "xbt/ex.h"
   8 #include "xbt/dict.h"
   9 #include "portable.h"
  10 #include "surf_private.h"
  11 #include "surf/surf_resource.h"
  12
  13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_storage, surf,
  14                                 "Logging specific to the SURF storage module");
  15
  16 surf_model_t surf_storage_model = NULL;
  17
  18 typedef struct surf_storage {
  19   s_surf_resource_t generic_resource;
  20   const char* model;
  21   const char* content; /*should be a dict */
  22 } s_surf_storage_t, *surf_storage_t;
  23
  24 static surf_action_t storage_action_open(void *storage, const char* path, const char* mode)
  25 {
  26   return NULL;
  27 }
  28
  29 static surf_action_t storage_action_close(void *storage, surf_file_t fp)
  30 {
  31   return NULL;
  32 }
  33
  34 static surf_action_t storage_action_read(void *storage, void* ptr, size_t size, size_t nmemb, surf_file_t stream)
  35 {
  36   return NULL;
  37 }
  38
  39 static surf_action_t storage_action_write(void *storage, const void* ptr, size_t size, size_t nmemb, surf_file_t stream)
  40 {
  41   return NULL;
  42 }
  43
  44 static surf_action_t storage_action_stat(void *storage, int fd, void* buf)
  45 {
  46   return NULL;
  47 }
  48
  49 static void* storage_create_resource(const char* id, const char* model,
  50                                     const char* content, xbt_dict_t storage_properties)
  51 {
  52     XBT_INFO("SURF: storage_create_resource '%s'",id);
  53     surf_storage_t storage = NULL;
  54     xbt_assert(!surf_storage_resource_by_name(id),
  55                 "Storage '%s' declared several times in the platform file",
  56                 id);
  57     storage = (surf_storage_t) surf_resource_new(sizeof(s_surf_storage_t),
  58             surf_storage_model, id, storage_properties);
  59     storage->model = model;
  60     storage->content = content;
  61     xbt_lib_set(storage_lib, id, SURF_STORAGE_LEVEL, storage);
  62
  63     return storage;
  64 }
  65
  66 static void storage_finalize(void)
  67 {
  68   surf_model_exit(surf_storage_model);
  69   surf_storage_model = NULL;
  70 }
  71
  72 static void parse_storage_init(sg_platf_storage_cbarg_t storage)
  73 {
  74   storage_create_resource(storage->id,
  75       storage->model,
  76       storage->content,
  77       storage->properties);
  78 }
  79
  80 static void storage_define_callbacks()
  81 {
  82   sg_platf_storage_add_cb(parse_storage_init);
  83 }
  84
  85 static void surf_storage_model_init_internal(void)
  86 {
  87   XBT_DEBUG("surf_storage_model_init_internal");
  88   surf_storage_model = surf_model_init();
  89
  90   surf_storage_model->name = "Storage";
  91
  92   surf_storage_model->extension.storage.open = storage_action_open;
  93   surf_storage_model->extension.storage.close = storage_action_close;
  94   surf_storage_model->extension.storage.read = storage_action_read;
  95   surf_storage_model->extension.storage.write = storage_action_write;
  96   surf_storage_model->extension.storage.stat = storage_action_stat;
  97   surf_storage_model->extension.storage.create_resource = storage_create_resource;
  98
  99   surf_storage_model->model_private->finalize = storage_finalize;
 100
 101   xbt_dynar_push(model_list, &surf_storage_model);
 102 }
 103
 104 void surf_storage_model_init_default(void)
 105 {
 106   surf_storage_model_init_internal();
 107   storage_define_callbacks();
 108 }