67 lines
1.4 KiB
C++
67 lines
1.4 KiB
C++
#include "master.hpp"
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namespace factor
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{
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callback_heap::callback_heap(cell size, factor_vm *parent_) :
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seg(new segment(size,true)),
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here(seg->start),
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parent(parent_) {}
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callback_heap::~callback_heap()
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{
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delete seg;
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seg = NULL;
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}
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void factor_vm::init_callbacks(cell size)
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{
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callbacks = new callback_heap(size,this);
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}
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void callback_heap::update(callback *stub)
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{
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tagged<array> code_template(parent->userenv[CALLBACK_STUB]);
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cell rel_class = untag_fixnum(array_nth(code_template.untagged(),1));
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cell offset = untag_fixnum(array_nth(code_template.untagged(),3));
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parent->store_address_in_code_block(rel_class,
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(cell)(stub + 1) + offset,
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(cell)(stub->compiled + 1));
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flush_icache((cell)stub,stub->size);
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}
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callback *callback_heap::add(code_block *compiled)
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{
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tagged<array> code_template(parent->userenv[CALLBACK_STUB]);
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tagged<byte_array> insns(array_nth(code_template.untagged(),0));
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cell size = array_capacity(insns.untagged());
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cell bump = align8(size) + sizeof(callback);
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if(here + bump > seg->end) fatal_error("Out of callback space",0);
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callback *stub = (callback *)here;
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stub->compiled = compiled;
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memcpy(stub + 1,insns->data<void>(),size);
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stub->size = align8(size);
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here += bump;
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update(stub);
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return stub;
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}
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void factor_vm::primitive_callback()
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{
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tagged<word> w(dpop());
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w.untag_check(this);
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callback *stub = callbacks->add(w->code);
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box_alien(stub + 1);
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}
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}
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