mirror of
https://github.com/zenorogue/hyperrogue.git
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311 lines
8.7 KiB
C++
311 lines
8.7 KiB
C++
// Hyperbolic Rogue -- memory saving
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// Copyright (C) 2011-2018 Zeno Rogue, see 'hyper.cpp' for details
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/** \file memory.cpp
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* \brief memory saving: memory saving mode, memory warnings, etc.
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*/
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#include "hyper.h"
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namespace hr {
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#if HDR
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static constexpr int PSEUDOKEY_MEMORY = 16397;
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#endif
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EX bool memory_saving_mode = true;
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EX bool show_memory_warning = true;
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EX bool ignored_memory_warning;
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static constexpr int LIM = 150;
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EX heptagon *last_cleared;
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EX void destroycellcontents(cell *c) {
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c->land = laMemory;
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c->wall = waChasm;
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c->item = itNone;
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if(!isMultitile(c->monst) && c->monst != moPair)
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c->monst = moNone;
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}
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void degrade(cell *c) {
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c->mpdist++;
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forCellEx(c2, c)
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if(c2->mpdist < c->mpdist - 1)
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degrade(c2);
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destroycellcontents(c);
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}
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EX vector<cell*> removed_cells;
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void slow_delete_cell(cell *c) {
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while(c->mpdist < BARLEV)
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degrade(c);
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for(int i=0; i<c->type; i++)
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if(c->move(i))
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c->move(i)->move(c->c.spin(i)) = NULL;
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removed_cells.push_back(c);
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destroy_cell(c);
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}
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void delete_heptagon(heptagon *h2) {
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cell *c = h2->c7;
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if(BITRUNCATED) {
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for(int i=0; i<c->type; i++)
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if(c->move(i))
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slow_delete_cell(c->move(i));
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}
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slow_delete_cell(c);
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for(int i=0; i<S7; i++)
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if(h2->move(i))
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h2->move(i)->move(h2->c.spin(i)) = NULL;
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tailored_delete(h2);
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}
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void recursive_delete(heptagon *h, int i) {
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heptagon *h2 = h->move(i);
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{ for(int i=1; i<S7; i++)
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if(h2->move(i) && h2->move(i)->move(0) == h2)
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recursive_delete(h2, i); }
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if(h2->alt && h2->alt->alt == h2->alt) {
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DEBB(DF_MEMORY, ("destroying alternate map ", h2->alt));
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for(hrmap *& hm: allmaps) {
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if(hm->getOrigin() == h2->alt) {
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delete hm;
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hm = allmaps.back();
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allmaps.pop_back();
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DEBB(DF_MEMORY, ("map found (", isize(allmaps), " altmaps total)"));
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break;
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}
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}
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}
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if(h2->alt) {
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h2->alt->cdata = NULL;
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}
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delete_heptagon(h2);
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h->move(i) = NULL;
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}
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bool unsafeLand(cell *c) {
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return
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isCyclic(c->land) || isGravityLand(c->land) || isHaunted(c->land) ||
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among(c->land, laCaribbean, laOcean, laGraveyard, laPrincessQuest);
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}
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EX void save_memory() {
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if(quotient || !hyperbolic || NONSTDVAR) return;
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if(!memory_saving_mode) return;
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if(unsafeLand(cwt.at)) return;
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int d = celldist(cwt.at);
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if(d < LIM+10) return;
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heptagon *at = cwt.at->master;
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heptagon *orig = currentmap->gamestart()->master;
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if(recallCell.at) {
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if(unsafeLand(recallCell.at)) return;
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heptagon *at2 = recallCell.at->master;
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int t = 0;
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while(at != at2) {
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t++; if(t > 10000) return;
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if(celldist(at->c7) > celldist(at2->c7))
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at = at->move(0);
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else
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at2 = at2->move(0);
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}
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}
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while(celldist(at->c7) > d-LIM && at != orig) at = at->move(0);
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// make sure it is not the same altmap
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auto atalt = at->alt; if(atalt) atalt = atalt->alt;
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while(atalt && at != orig && at->alt && at->alt->alt == atalt) at = at->move(0);
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// go back to such a point X that all the heptagons adjacent to the current 'at'
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// are the children of X. This X becomes the new 'at'
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if(true) {
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heptagon *allh[FULL_EDGE+1];
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int hcount = 0;
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allh[hcount++] = at;
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for(int j=0; j<S7; j++)
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if(allh[0]->move(j))
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allh[hcount++] = at->move(j);
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int deuniq_steps = 0;
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int i = 1;
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while(i < hcount) {
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if(allh[i] == allh[0])
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allh[i] = allh[hcount-1], hcount--;
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else if(celldist(allh[i]->c7) > celldist(allh[0]->c7))
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allh[i] = allh[i]->move(0);
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else {
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if(allh[0] == orig) return;
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allh[0] = allh[0]->move(0);
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i = 1;
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deuniq_steps++;
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if(deuniq_steps == 10) return;
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}
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}
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at = allh[0];
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}
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if(last_cleared && celldist(at->c7) < celldist(last_cleared->c7))
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return;
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DEBB(DF_MEMORY, ("celldist = ", make_pair(celldist(cwt.at), celldist(at->c7))));
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heptagon *at1 = at;
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while(at != last_cleared && at != orig) {
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heptagon *atn = at;
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at = at->move(0);
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for(int i=1; i<S7; i++)
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if(at->move(i) && at->move(i) != atn)
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recursive_delete(at, i);
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}
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last_cleared = at1;
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DEBB(DF_MEMORY, ("current cellcount = ", cellcount));
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sort(removed_cells.begin(), removed_cells.end());
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callhooks(hooks_removecells);
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removed_cells.clear();
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}
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EX purehookset hooks_removecells;
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EX bool is_cell_removed(cell *c) {
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return binary_search(removed_cells.begin(), removed_cells.end(), c);
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}
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EX void set_if_removed(cell*& c, cell *val) {
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if(is_cell_removed(c)) c = val;
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}
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typedef array<char, 1048576> reserve_block;
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EX int reserve_count = 0;
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EX int reserve_limit = 128;
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const int max_reserve = 4096;
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array<reserve_block*, max_reserve> reserve;
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std::new_handler default_handler;
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EX purehookset hooks_clear_cache;
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void reserve_handler() {
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if(reserve_count) {
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reserve_count--;
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delete reserve[reserve_count];
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}
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if(reserve_count < 32) callhooks(hooks_clear_cache);
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if(!reserve_count) std::set_new_handler(default_handler);
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}
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EX void apply_memory_reserve() {
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#if CAP_MEMORY_RESERVE
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if(reserve_count > 0) std::set_new_handler(default_handler);
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if(reserve_limit > max_reserve) reserve_limit = max_reserve;
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if(reserve_limit < 0) reserve_limit = 0;
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while(reserve_count > reserve_limit) { reserve_count--; delete reserve[reserve_count]; }
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try {
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while(reserve_count < reserve_limit) {
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reserve[reserve_count] = new reserve_block;
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/* only if successful */
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reserve_count++;
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}
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}
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catch(std::bad_alloc&) {}
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#if ISWINDOWS
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// no get_new_handler on this compiler...
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default_handler = [] { throw std::bad_alloc(); };
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#else
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default_handler = std::get_new_handler();
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#endif
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if(reserve_count > 0) std::set_new_handler(reserve_handler);
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#endif
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}
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EX void memory_for_lib() {
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if(reserve_count) { reserve_count--; delete reserve[reserve_count]; }
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}
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EX void show_memory_menu() {
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gamescreen();
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dialog::init(XLAT("memory"));
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dialog::addHelp(XLAT(
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"HyperRogue takes place in a world that is larger than anything Euclidean. "
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"Unfortunately, in some cases running it on an Euclidean computer might be "
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"a problem -- the computer could simply run out of memory. Some lands (such as the Ocean or the Brown Islands) "
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"may use up memory very fast!\n\n"
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));
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if(sizeof(void*) <= 4)
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dialog::addHelp(XLAT(
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"You are playing a 32-bit HyperRogue executable, which can only use 4GB of memory.\n\n"));
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dialog::addHelp(XLAT(
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"Although you are extremely unlikely to return to a place you have already been to, "
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"the game never forgets these areas, unless you start a new game, use an Orb of "
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"Safety (found in Land of Eternal Motion, the Prairie, and the Ocean), or activate the memory "
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"saving mode, which tries to intelligently predict which cells you will never find "
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"again and can be safely forgotten.\n\n")
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);
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if(cheater) dialog::addSelItem(XLAT("cells in memory"), its(cellcount) + "+" + its(heptacount), 0);
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dialog::addBoolItem(XLAT("memory saving mode"), memory_saving_mode, 'f');
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dialog::add_action([] { memory_saving_mode = !memory_saving_mode; if(memory_saving_mode) save_memory(), apply_memory_reserve(); });
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dialog::addBoolItem_action(XLAT("show memory warnings"), show_memory_warning, 'w');
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#if CAP_MEMORY_RESERVE
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if(reserve_limit > 0 && reserve_count < reserve_limit) {
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dialog::addItem(XLAT("just let me find Orb of Safety or finish the game"), 'l');
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dialog::add_action([] { ignored_memory_warning = true; popScreen(); });
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}
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dialog::addSelItem("memory reserve", its(reserve_count) + "/" + its(reserve_limit) + " MB", 'r');
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dialog::add_action([] {
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dialog::editNumber(reserve_limit, 0, max_reserve, 16, 128, XLAT("memory reserve"),
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XLAT("When to show a memory warning.")
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);
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dialog::bound_low(0);
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dialog::bound_up(max_reserve);
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dialog::get_di().reaction = apply_memory_reserve;
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});
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#endif
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dialog::addItem(XLAT("clear caches"), 'c');
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dialog::add_action([] { callhooks(hooks_clear_cache); });
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dialog::addBack();
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dialog::display();
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}
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EX bool protect_memory() {
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#if CAP_MEMORY_RESERVE
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apply_memory_reserve();
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if(reserve_limit && reserve_count < reserve_limit && !ignored_memory_warning) {
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pushScreen(show_memory_menu);
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return true;
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}
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if(reserve_limit && reserve_count < 8) {
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pushScreen(show_memory_menu);
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return true;
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}
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#endif
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return false;
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}
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EX bool memory_issues() {
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return reserve_limit && reserve_count < 16;
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}
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}
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