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| 1 | +// | |
| 2 | +// Dis VM | |
| 3 | +// File: list.cpp | |
| 4 | +// Author: arr | |
| 5 | +// | |
| 6 | + | |
| 7 | +#include <runtime.h> | |
| 8 | +#include <vm_memory.h> | |
| 9 | +#include <debug.h> | |
| 10 | + | |
| 11 | +using namespace disvm; | |
| 12 | +using namespace disvm::runtime; | |
| 13 | + | |
| 14 | +std::shared_ptr<const type_descriptor_t> vm_list_t::type_desc() | |
| 15 | +{ | |
| 16 | + return intrinsic_type_desc::type<vm_list_t>(); | |
| 17 | +} | |
| 18 | + | |
| 19 | +vm_list_t::vm_list_t(std::shared_ptr<const type_descriptor_t> td, vm_list_t *tail) | |
| 20 | + : vm_alloc_t(vm_list_t::type_desc()) | |
| 21 | + , _element_type{ td } | |
| 22 | + , _is_alloc{ sizeof(_mem) < td->size_in_bytes } | |
| 23 | + , _mem{} | |
| 24 | + , _tail{ tail } | |
| 25 | +{ | |
| 26 | + assert(_element_type != nullptr); | |
| 27 | + if (_tail != nullptr) | |
| 28 | + { | |
| 29 | + assert(tail->get_element_type() == _element_type); | |
| 30 | + _tail->add_ref(); | |
| 31 | + } | |
| 32 | + | |
| 33 | + // If the default list element storage is not enough, allocate more memory. | |
| 34 | + if (_is_alloc) | |
| 35 | + { | |
| 36 | + _mem.alloc = static_cast<pointer_t>(alloc_memory(_element_type->size_in_bytes)); | |
| 37 | + init_memory(*_element_type, _mem.alloc); | |
| 38 | + } | |
| 39 | + else | |
| 40 | + { | |
| 41 | + init_memory(*_element_type, &_mem.local); | |
| 42 | + } | |
| 43 | + | |
| 44 | + debug::log_msg(debug::component_trace_t::memory, debug::log_level_t::debug, "init: vm list: new\n"); | |
| 45 | +} | |
| 46 | + | |
| 47 | +vm_list_t::~vm_list_t() | |
| 48 | +{ | |
| 49 | + // Remove tail | |
| 50 | + dec_ref_count_and_free(_tail); | |
| 51 | + _tail = nullptr; | |
| 52 | + | |
| 53 | + // Destroy and free the list element, if default element size was surpassed. | |
| 54 | + if (_is_alloc) | |
| 55 | + { | |
| 56 | + destroy_memory(*_element_type, _mem.alloc); | |
| 57 | + free_memory(_mem.alloc); | |
| 58 | + } | |
| 59 | + else | |
| 60 | + { | |
| 61 | + destroy_memory(*_element_type, &_mem.local); | |
| 62 | + } | |
| 63 | + | |
| 64 | + debug::assign_debug_pointer(&_mem.alloc); | |
| 65 | + debug::log_msg(debug::component_trace_t::memory, debug::log_level_t::debug, "destroy: vm list\n"); | |
| 66 | +} | |
| 67 | + | |
| 68 | +std::shared_ptr<const type_descriptor_t> vm_list_t::get_element_type() const | |
| 69 | +{ | |
| 70 | + return _element_type; | |
| 71 | +} | |
| 72 | + | |
| 73 | +word_t vm_list_t::get_length() const | |
| 74 | +{ | |
| 75 | + auto len = word_t{ 1 }; | |
| 76 | + auto list = _tail; | |
| 77 | + while (list != nullptr) | |
| 78 | + { | |
| 79 | + len++; | |
| 80 | + list = list->get_tail(); | |
| 81 | + } | |
| 82 | + | |
| 83 | + return len; | |
| 84 | +} | |
| 85 | + | |
| 86 | +vm_list_t *vm_list_t::get_tail() const | |
| 87 | +{ | |
| 88 | + return _tail; | |
| 89 | +} | |
| 90 | + | |
| 91 | +vm_list_t *vm_list_t::drop_tail() | |
| 92 | +{ | |
| 93 | + auto tail = _tail; | |
| 94 | + _tail = nullptr; | |
| 95 | + tail->release(); | |
| 96 | + return tail; | |
| 97 | +} | |
| 98 | + | |
| 99 | +pointer_t vm_list_t::value() const | |
| 100 | +{ | |
| 101 | + if (_is_alloc) | |
| 102 | + return _mem.alloc; | |
| 103 | + else | |
| 104 | + return reinterpret_cast<pointer_t>(&_mem.local); | |
| 105 | +} | |