NAME

src/pmc/unmanagedstruct.pmc - C struct with unmanaged memory

DESCRIPTION

PMC class to hold C structs that parrot's not responsible for disposing of.

Buffer can be accessed using keyed assignments to PMC. Out of bounds access will very likely segfault.

Functions

static char *char_offset_int(Interp *interpreter, PMC *pmc, INTVAL ix, int *type): Returns the pointer for the element at index ix, and sets the element type in *type.
INTVAL key_2_idx(Interp *interpreter, PMC *pmc, PMC *key): Returns the index for the element associated with key *key. Raises an exception if the key doesn't exist.
static char *char_offset_key(Interp *interpreter, PMC *pmc, PMC *key, int *type): Returns the pointer for the element associated with key *key, and sets the element type in *type.
static INTVAL ret_int(char *p, int type): Returns the element of type type starting at *p as an INTVAL.; If, for example, char or c<short> type size doesn't match, this will fail we need some more configure support for type sizes.
static FLOATVAL ret_float(char *p, int type): Returns the element of type type starting at *p as a FLOATVAL.
static STRING *ret_string(Interp *interpreter, char *p, int type): Returns the element of type type starting at *p as a Parrot string.
static PMC *ret_pmc(Interp *interpreter, PMC *pmc, char *p, int type, INTVAL idx): Returns the element of type type starting at *p as a PMC.
static void set_int(char *p, int type, INTVAL value)
static void set_float(char *p, int type, FLOATVAL value): Sets the value of the element of type type starting at *p to value.
static void set_string(char *p, int type, STRING *value): Sets the value of the element of type type starting at *p to *value.
static int calc_align(Interp *interpreter, PMC *pmc, PMC *type_pmc, int type, int offs): Alignment of contained structures is the alignment of the biggest item in that struct.; i386: long long or double is aligned on 4.; This is recursive as structure definitions.
static size_t calc_offsets(Interp *interpreter, PMC *pmc, PMC *value, size_t toff): Calculates the offsets for the struct. See init_pmc() for a description of *value.

Methods

void init(): Initializes the struct with a default value of NULL.
void init_pmc(PMC *value): Initialize the struct with some data.; *value should be an array of triples of:
void set_pmc(PMC *value): Sets *value (see init_pmc() and calculates the offsets.
void mark(): Marks the struct as live.
INTVAL is_equal(PMC *value): Returns whether the two structs are equivalent.
INTVAL defined(): Returns whether the struct is defined.
INTVAL get_integer(): Returns the size of the struct.
void set_integer_native(INTVAL size): Sets the size of the struct.
INTVAL get_integer_keyed_int(INTVAL ix): Returns the integer value at index ix.
INTVAL get_integer_keyed(PMC *key): Returns the integer value associated with *key.
FLOATVAL get_number_keyed_int(INTVAL key): Returns the floating-point value at index ix.
FLOATVAL get_number_keyed(PMC *key): Returns the floating-point value associated with *key.
STRING *get_string_keyed_int(INTVAL key): Returns the Parrot string value at index ix.
STRING *get_string_keyed(PMC *key): Returns the Parrot string value associated with *key.
PMC *get_pmc_keyed_int(INTVAL key): Returns the PMC value at index ix.
PMC *get_pmc_keyed(PMC *key): Returns the PMC value associated with *key.
void *get_pointer(): Returns the pointer to the actual C struct.
void set_pointer(void *value): Set the pointer to the actual C struct.
void set_integer_keyed_int(INTVAL ix, INTVAL value): Sets the value of the element at index ix to value.
void set_integer_keyed(PMC *key, INTVAL value): Sets the value of the element associated with key *key to value.; May cause segfaults if value is out of bounds.
void set_number_keyed_int(INTVAL key, FLOATVAL value): Sets the value of the element at index ix to value.
void set_number_keyed(PMC *key, FLOATVAL value): Sets the value of the element associated with key *key to value.
void set_string_keyed_int(INTVAL key, STRING *value): Sets the value of the element at index key to *value.
void set_string_keyed(PMC *key, STRING *value): Sets the value of the element associated with key *key to *value.

HISTORY

Initial revision by sean 2002/08/04

NAME

DESCRIPTION

Functions

Methods

HISTORY

SEE ALSO