diff options
Diffstat (limited to 'src/H5I.c')
| -rw-r--r-- | src/H5I.c | 81 |
1 files changed, 70 insertions, 11 deletions
@@ -32,28 +32,86 @@ * 6/10/97 - Moved into HDF5 library */ -#include "H5private.h" -#include "H5Eprivate.h" -#include "H5FLprivate.h" /*Free Lists */ -#include "H5Iprivate.h" -#include "H5MMprivate.h" +#define H5I_PACKAGE /*suppress error about including H5Ipkg */ + +#include "H5private.h" /* Generic Functions */ +#include "H5Eprivate.h" /* Error handling */ +#include "H5FLprivate.h" /* Free Lists */ +#include "H5Ipkg.h" /* IDs */ +#include "H5MMprivate.h" /* Memory management */ /* Define this to compile in support for dumping ID information */ /* #define H5I_DEBUG_OUTPUT */ #ifndef H5I_DEBUG_OUTPUT -#include "H5Gprivate.h" /*symbol tables */ +#include "H5Gprivate.h" /* Groups */ #else /* H5I_DEBUG_OUTPUT */ #define H5G_PACKAGE /*suppress error message about including H5Gpkg.h */ -#include "H5Gpkg.h" -#include "H5Dprivate.h" /*datasets */ -#include "H5Tprivate.h" /*data types */ +#include "H5Gpkg.h" /* Groups */ +#include "H5Dprivate.h" /* Datasets */ +#include "H5Tprivate.h" /* Datatypes */ #endif /* H5I_DEBUG_OUTPUT */ -/* Interface initialialization? */ +/* Pablo information */ #define PABLO_MASK H5I_mask + +/* Interface initialization */ static int interface_initialize_g = 0; #define INTERFACE_INIT H5I_init_interface -static herr_t H5I_init_interface(void); + +/* Local Macros */ + +/* + * Define the following macro for fast hash calculations (but limited + * hash sizes) + */ +#define HASH_SIZE_POWER_2 + +/* Define the following macro for atom caching over all the atoms */ +#define IDS_ARE_CACHED + +#ifdef IDS_ARE_CACHED +# define ID_CACHE_SIZE 4 /*# of previous atoms cached */ +#endif + +#ifdef HASH_SIZE_POWER_2 +/* + * Map an ID to a hash location (assumes s is a power of 2 and smaller + * than the ID_MASK constant). + */ +# define H5I_LOC(a,s) ((hid_t)((size_t)(a)&((s)-1))) +# define POWER_OF_TWO(n) ((((n) - 1) & (n)) == 0 && (n) > 0) +#else +/* + * Map an ID to a hash location. + */ +# define H5I_LOC(a,s) (((hid_t)(a)&ID_MASK)%(s)) +#endif + +/* Combine a Group number and an atom index into an atom */ +#define H5I_MAKE(g,i) ((((hid_t)(g)&GROUP_MASK)<<ID_BITS)| \ + ((hid_t)(i)&ID_MASK)) + +/* Local typedefs */ + +/* Atom information structure used */ +typedef struct H5I_id_info_t { + hid_t id; /* ID for this info */ + unsigned count; /* ref. count for this atom */ + void *obj_ptr; /* pointer associated with the atom */ + struct H5I_id_info_t *next; /* link to next atom (in case of hash-clash)*/ +} H5I_id_info_t; + +/* ID group structure used */ +typedef struct { + unsigned count; /*# of times this group has been initialized*/ + unsigned reserved; /*# of IDs to reserve for constant IDs */ + unsigned wrapped; /*whether the id count has wrapped around */ + size_t hash_size; /*sizeof the hash table to store the IDs in */ + unsigned ids; /*current number of IDs held */ + unsigned nextid; /*ID to use for the next atom */ + H5I_free_t free_func; /*release object method */ + H5I_id_info_t **id_list; /*pointer to an array of ptrs to IDs */ +} H5I_id_group_t; /*-------------------- Locally scoped variables -----------------------------*/ @@ -69,6 +127,7 @@ static H5I_id_group_t *H5I_id_group_list_g[H5I_NGROUPS]; H5FL_DEFINE_STATIC(H5I_id_info_t); /*--------------------- Local function prototypes ---------------------------*/ +static herr_t H5I_init_interface(void); static H5I_id_info_t *H5I_find_id(hid_t id); #ifdef H5I_DEBUG_OUTPUT static herr_t H5I_debug(H5I_type_t grp); |