华容道高性能计算引擎
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#include "common.h"
#include "all_cases.h"
std::mutex AllCases::all_cases_building;
bool AllCases::all_cases_available = false;
std::vector<uint32_t> AllCases::all_cases[];
AllCases::Status AllCases::all_cases_status() { // get all cases status
if (all_cases_available) {
return AVAILABLE; // all cases already built
}
if (!all_cases_building.try_lock()) { // fail to lock mutex -> another thread working
return BUILDING;
}
all_cases_building.unlock(); // release mutex
return NO_INIT;
}
const std::vector<uint32_t> (*AllCases::get_all_cases())[16] { // get const ptr of all cases
if (all_cases->empty()) {
build_all_cases(); // all cases initialize
}
return &all_cases; // return ptr
}
void AllCases::build_all_cases() { // build all cases
if (AllCases::all_cases_available) {
return; // all cases already built
}
if (AllCases::all_cases_building.try_lock()) { // lock success -> start building
/// head -> 0/1/2 / 4/5/6 / 8/9/10 / 12/13/14
for (uint32_t head = 0; head < 16; ++head) { // address of 2x2 block
if ((head & 0b11) == 0b11) {
continue; // invalid 2x2 address
}
for (uint32_t const &range : *get_basic_ranges()) { // check base on 2x2 address and range
if (Common::check_case(head, range)) {
all_cases[head].emplace_back(Common::range_reverse(range)); // found valid case
}
}
}
AllCases::all_cases_available = true; // set available flag
} else { // another thread building
AllCases::all_cases_building.lock(); // blocking waiting
}
AllCases::all_cases_building.unlock();
}