| parrotcode unmanagedstruct PMC | |
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src/pmc/unmanagedstruct.pmc - C struct with unmanaged memory
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.
static char * char_offset_int(PARROT_INTERP,
PMC *pmc,
INTVAL ix,
int *type)Returns the pointer for the element at index ix,
and sets the element type in *type.
static INTVAL key_2_idx(PARROT_INTERP,
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(PARROT_INTERP,
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(PARROT_INTERP,
const 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(PARROT_INTERP,
const char *p,
int type)Returns the element of type type starting at *p as a FLOATVAL.
static STRING* ret_string(PARROT_INTERP,
char *p,
int type)Returns the element of type type starting at *p as a Parrot string.
static PMC* ret_pmc(PARROT_INTERP,
PMC *pmc,
char *p,
int type,
INTVAL idx)Returns the element of type type starting at *p as a PMC.
static void set_int(PARROT_INTERP,
char *p,
int type,
INTVAL value)
static void set_float(PARROT_INTERP,
char *p,
int type,
FLOATVAL value)Sets the value of the element of type type starting at *p to value.
static void set_string(PARROT_INTERP,
char *p,
int type,
STRING *value)Sets the value of the element of type type starting at *p to *value.
static int calc_align(PARROT_INTERP,
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(PARROT_INTERP,
PMC *pmc,
PMC *value,
size_t toff)Calculates the offsets for the struct.
See init_pmc() for a description of *value.
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:
The datatype.
See the enum in include/parrot/datatypes.h.
The count.
The offset.
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.
Initial revision by sean 2002/08/04
docs/pmc/struct.pod
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