Max Wash
c628390f4a
address-space is a non-recursive data structure, which contains a flat list of vm_areas representing mapped vm-objects. userspace programs can no longer create sub-address-spaces. instead, they can reserve portions of the address space, and use that reserved space to create mappings.
34 lines
773 B
C
34 lines
773 B
C
#ifndef KERNEL_IOVEC_H_
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#define KERNEL_IOVEC_H_
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#include <mango/types.h>
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#include <stddef.h>
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struct address_space;
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struct iovec_iterator {
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/* if this is set, we are iterating over a list of iovecs stored in
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* userspace, and must go through this region to retrieve the data. */
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struct address_space *it_region;
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const kern_iovec_t *it_vecs;
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size_t it_nr_vecs;
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size_t it_vec_ptr;
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virt_addr_t it_base;
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size_t it_len;
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};
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extern void iovec_iterator_begin(
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struct iovec_iterator *it,
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const kern_iovec_t *vecs,
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size_t nr_vecs);
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extern void iovec_iterator_begin_user(
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struct iovec_iterator *it,
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struct address_space *address_space,
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const kern_iovec_t *vecs,
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size_t nr_vecs);
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extern void iovec_iterator_seek(struct iovec_iterator *it, size_t nr_bytes);
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#endif
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