NAME

src/headers.c - Header management functions

DESCRIPTION

Handles getting of various headers, and pool creation.

Buffer Header Functions for small-object lookup table

static void *get_free_buffer(Interp *interp, struct Small_Object_Pool *pool)

Gets a free Buffer from pool and returns it. Memory is cleared.

Header Pool Creation Functions

struct Small_Object_Pool *new_pmc_pool(Interp *interp)

Creates an new pool for PMCs and returns it.

struct Small_Object_Pool *new_bufferlike_pool(Interp *interp, size_t actual_buffer_size)

Creates a new pool for buffer-like structures. Usually you would need make_bufferlike_pool().

struct Small_Object_Pool *new_buffer_pool(Interp *interp)

Non-constant strings and plain Buffers are in the sized header pools.

struct Small_Object_Pool *new_string_pool(Interp *interp, INTVAL constant)

Creates a new pool for STRINGS and returns it.

struct Small_Object_Pool *make_bufferlike_pool(Interp *interp, size_t buffer_size)

Make and return a bufferlike header pool.

struct Small_Object_Pool *get_bufferlike_pool(Interp *interp, size_t buffer_size)

Return a bufferlike header pool, it must exist.

PMC *new_pmc_header(Interp *interp)

Get a header.

PMC_EXT *new_pmc_ext(Interp *interp)

Creates a new PMC_EXT and returns it.

void add_pmc_ext(Interp *interp, PMC *pmc)

Adds a new PMC_EXT to pmc.

PMC *add_pmc_sync(Interp *interp, PMC *pmc)

Adds a PMC_sync field to pmc.

STRING *new_string_header(Interp *interp, UINTVAL flags)

Returns a new STRING header.

Buffer *new_buffer_header(Interp *interp)

Creates and returns a new Buffer.

void *new_bufferlike_header(Interp *interp, size_t size)

Creates and returns a new buffer-like header.

size_t get_max_buffer_address(Interp *interp)

Calculates the maximum buffer address and returns it.

size_t get_min_buffer_address(Interp *interp)

Calculates the minimum buffer address and returns it.

size_t get_max_pmc_address(Interp *interp)

Calculates the maximum PMC address and returns it.

size_t get_min_pmc_address(Interp *interp)

Calculates the maximum PMC address and returns it.

int is_buffer_ptr(Interp *interp, void *ptr)

Checks that ptr is actually a Buffer.

int is_pmc_ptr(Interp *interp, void *ptr)

Checks that ptr is actually a PMC.

void Parrot_initialize_header_pools(Interp *interp)

Initialize the pools for the tracked resources.

int Parrot_forall_header_pools(Interp *, int flag, void *arg, pool_iter_fn)

Iterate through all header pools by calling the passed function. Returns zero if the iteration didn't stop or the returned value.

flag is one of

  POOL_PMC
  POOL_BUFFER
  POOL_CONST
  POOL_ALL

Only matching pools will be used.

arg

This argument is passed on to the iteration function.

pool_iter_fn

It is called with Interp*, Small_Object_Pool *, int flag, void *arg) If the function returns a non-zero value iteration will stop.

void Parrot_destroy_header_pools(Interp *interp)

Destroys the header pools.

void Parrot_merge_header_pools(Interp *dest_interp, Interp *source_interp)

Merge the header pools of source_interp into those of dest_interp. (Used to deal with shared objects left after interpreter destruction.

void Parrot_initialize_header_pool_names(Interp *interp)

If we want these names, they must be added in DOD.

SEE ALSO

include/parrot/headers.h.

HISTORY

Initial version by Mike Lambert on 2002.05.27.