/
pointer_array.c
161 lines (113 loc) · 2.93 KB
/
pointer_array.c
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/*
Copyright (C) 2010-2012, Parrot Foundation.
=head1 NAME
src/pointer_array.c - Implementation Pointer Array storage.
=head1 DESCRIPTION
This compilation unit implements pointer array storage.
=cut
*/
#include "parrot/parrot.h"
#include "parrot/pointer_array.h"
/* HEADERIZER HFILE: include/parrot/pointer_array.h */
/*
=over 4
=item C<Parrot_Pointer_Array * Parrot_pa_new(PARROT_INTERP)>
Allocate new Pointer_Array.
=cut
*/
PARROT_EXPORT
PARROT_MALLOC
PARROT_CANNOT_RETURN_NULL
Parrot_Pointer_Array *
Parrot_pa_new(SHIM_INTERP)
{
ASSERT_ARGS(Parrot_pa_new)
Parrot_Pointer_Array * const res = mem_internal_allocate_zeroed_typed(Parrot_Pointer_Array);
return res;
}
/*
=item C<void Parrot_pa_destroy(PARROT_INTERP, Parrot_Pointer_Array *self)>
Destroy Pointer_Arra and free allocated memory.
=cut
*/
PARROT_EXPORT
void
Parrot_pa_destroy(SHIM_INTERP, ARGFREE(Parrot_Pointer_Array *self))
{
ASSERT_ARGS(Parrot_pa_destroy)
size_t i;
for (i = 0; i < self->total_chunks; i++)
mem_sys_free(self->chunks[i]);
mem_sys_free(self->chunks);
mem_sys_free(self);
}
/*
=item C<size_t Parrot_pa_count_allocated(PARROT_INTERP, const
Parrot_Pointer_Array *self)>
Get count of allocated objects.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_PURE_FUNCTION
size_t
Parrot_pa_count_allocated(SHIM_INTERP, ARGIN(const Parrot_Pointer_Array *self))
{
ASSERT_ARGS(Parrot_pa_count_allocated)
return self->total_chunks * CELL_PER_CHUNK;
}
/*
=item C<size_t Parrot_pa_count_used(PARROT_INTERP, const Parrot_Pointer_Array
*self)>
Get count of allocated objects.
=cut
*/
PARROT_WARN_UNUSED_RESULT
size_t
Parrot_pa_count_used(SHIM_INTERP, ARGIN(const Parrot_Pointer_Array *self))
{
ASSERT_ARGS(Parrot_pa_count_used)
size_t count = 0;
POINTER_ARRAY_ITER(self, count++;);
return count;
}
/*
=item C<int Parrot_pa_is_owned(const Parrot_Pointer_Array *self, const void
*orig, const void *ref)>
Check that C<orig> pointer is stored in C<ref> cell. Used during system stack t
=cut
*/
PARROT_EXPORT
PARROT_WARN_UNUSED_RESULT
int
Parrot_pa_is_owned(ARGIN(const Parrot_Pointer_Array *self),
ARGIN(const void *orig), ARGIN_NULLOK(const void *ref))
{
ASSERT_ARGS(Parrot_pa_is_owned)
size_t i;
/* Return early if ref is null */
if (!ref)
return 0;
/* We can't just deref pointer. It can be garbage */
/* So, ensure that C<ref> is looks like real pointer */
for (i = 0; i < self->total_chunks; i++) {
const Parrot_Pointer_Array_Chunk * const chunk = self->chunks[i];
if (PTR2UINTVAL(ref) < PTR2UINTVAL(chunk->data))
continue;
if (PTR2UINTVAL(ref) > PTR2UINTVAL(chunk) + CHUNK_SIZE)
continue;
return (*(void * const *)ref == orig);
}
return 0;
}
/*
=back
=head1 SEE ALSO
F<include/parrot/pointer_array.h>
=cut
*/
/*
* Local variables:
* c-file-style: "parrot"
* End:
* vim: expandtab shiftwidth=4 cinoptions='\:2=2' :
*/