kc3-lang/pkgconf/cache.c

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• Hash : c04a6435
  Author :
  Date : 2013-03-15T16:50:30
  

  cache: handle pkg being NULL on pkg_cache_add()/pkg_cache_remove()
  

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• cache.c

• /*
   * cache.c
   * package object cache
   *
   * Copyright (c) 2013 pkgconf authors (see AUTHORS).
   *
   * Permission to use, copy, modify, and/or distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * This software is provided 'as is' and without any warranty, express or
   * implied.  In no event shall the authors be liable for any damages arising
   * from the use of this software.
   */
  
  #include "pkg.h"
  
  static pkg_list_t pkg_cache = PKG_LIST_INITIALIZER;
  
  /*
   * pkg_cache_lookup(id)
   *
   * looks up a package in the cache given an 'id' atom,
   * such as 'gtk+-3.0' and returns the already loaded version
   * if present.
   */
  pkg_t *
  pkg_cache_lookup(const char *id)
  {
  	pkg_node_t *node;
  
  	PKG_FOREACH_LIST_ENTRY(pkg_cache.head, node)
  	{
  		pkg_t *pkg = node->data;
  
  		if (!strcmp(pkg->id, id))
  			return pkg_ref(pkg);
  	}
  
  	return NULL;
  }
  
  /*
   * pkg_cache_add(pkg)
   *
   * adds an entry for the package to the package cache.
   * the cache entry must be removed if the package is freed.
   */
  void
  pkg_cache_add(pkg_t *pkg)
  {
  	if (pkg == NULL)
  		return;
  
  	pkg_ref(pkg);
  
  	pkg_node_insert(&pkg->cache_iter, pkg, &pkg_cache);
  }
  
  /*
   * pkg_cache_remove(pkg)
   *
   * deletes a package from the cache entry.
   */
  void
  pkg_cache_remove(pkg_t *pkg)
  {
  	if (pkg == NULL)
  		return;
  
  	pkg_node_delete(&pkg->cache_iter, &pkg_cache);
  }
  
  void
  pkg_cache_free(void)
  {
  	pkg_node_t *iter, *iter2;
  
  	PKG_FOREACH_LIST_ENTRY_SAFE(pkg_cache.head, iter2, iter)
  	{
  		pkg_t *pkg = iter->data;
  
  		pkg_free(pkg);
  	}
  }
  

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