enlightenment/src/bin/e_filereg.c

/*
 * vim:ts=8:sw=3:sts=8:noexpandtab:cino=>5n-3f0^-2{2
 */
#include "e.h"

/*
 * Implementation of a protected file registry. Any files that are
 * currently being used by E in core components should be registered
 * here and will be protected as best as E can. :)
 */
static Evas_Hash *_e_filereg = NULL;

typedef struct _Filereg_Item Filereg_Item;
struct _Filereg_Item
{
   const char *path;
   int ref_count;
};

static Evas_Bool _filereg_hash_cb_free(Evas_Hash *hash __UNUSED__, 
				       const char *key __UNUSED__, 
				       void *data, void *fdata __UNUSED__);

/* Externally accessible functions */
EAPI int
e_filereg_init(void) 
{
   return 1;
}

EAPI int
e_filereg_shutdown(void) 
{
   evas_hash_foreach(_e_filereg, _filereg_hash_cb_free, NULL);
   evas_hash_free(_e_filereg);
   _e_filereg = NULL;
   return 1;
}

EAPI int
e_filereg_register(const char *path) 
{
   Filereg_Item *fi = NULL;
   
   fi = evas_hash_find(_e_filereg, path);
   if (fi) 
     {
	fi->ref_count++;
	return 1;
     }
   fi = E_NEW(Filereg_Item, 1);
   if (!fi) return 0;
   fi->path = evas_stringshare_add(path);
   fi->ref_count = 1;
   _e_filereg = evas_hash_add(_e_filereg, path, fi);
   return 1;
}

EAPI void
e_filereg_deregister(const char *path) 
{
   Filereg_Item *fi = NULL;
   
   fi = evas_hash_find(_e_filereg, path);
   if (fi) 
     {
	fi->ref_count--;
	if (fi->ref_count == 0) 
	  {
	     _e_filereg = evas_hash_del(_e_filereg, path, fi);
	     if (fi->path) evas_stringshare_del(fi->path);
	     E_FREE(fi);
	  }
     }
}

EAPI Evas_Bool
e_filereg_file_protected(const char *path) 
{
   Filereg_Item *fi = NULL;
   
   fi = evas_hash_find(_e_filereg, path);
   if (!fi) return 0;
   else return 1;
}

/* Private Functions */
static Evas_Bool 
_filereg_hash_cb_free(Evas_Hash *hash __UNUSED__, const char *key __UNUSED__, 
		      void *data, void *fdata __UNUSED__) 
{
   Filereg_Item *fi;
   
   fi = data;
   if (!fi) return 1;
   if (fi->path) evas_stringshare_del(fi->path);
   E_FREE(fi);
   return 1;
}