/*
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* =====================================================================================
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*
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* Filename: defs.cpp
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*
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* Description:
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*
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* Version: 1.0
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* Created: 2021年04月06日 19时23分14秒
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* Revision: none
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* Compiler: gcc
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*
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* Author: Li Chao (),
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* Organization:
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*
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* =====================================================================================
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*/
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#include "defs.h"
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#include "msg.h"
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#include "shm_msg_queue.h"
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#include "shm_socket.h"
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#include <boost/uuid/random_generator.hpp>
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#include <boost/uuid/string_generator.hpp>
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#include <boost/uuid/uuid.hpp>
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#include <sys/file.h>
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namespace
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{
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struct LastError {
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int ec_ = 0;
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std::string msg_;
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};
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LastError &LastErrorStore()
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{
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thread_local LastError le;
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return le;
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}
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constexpr int64_t AllocSizeIndex[] = {
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16, 24, 32, 40, 48, 56, 64, 72,
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80, 88, 96, 104, 120, 136, 152, 168,
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184, 200, 224, 248, 272, 296, 328, 360,
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392, 432, 472, 520, 568, 624, 680, 744,
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816, 896, 984, 1080, 1184, 1296, 1416, 1544,
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1688, 1848, 2016, 2200, 2400, 2624, 2864, 3128,
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3416, 3728, 4072, 4448, 4856, 5304, 5792, 6320,
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6896, 7528, 8216, 8968, 9784, 10680, 11656, 12720,
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13880, 15144, 16520, 18024, 19664, 21456, 23408, 25536,
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27864, 30400, 33168, 36184, 39480, 43072, 46992, 51264,
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55928, 61016, 66568, 72624, 79232, 86440, 94304, 102880,
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112232, 122440, 133576, 145720, 158968, 173424, 189192, 206392,
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225160, 245632, 267968, 292328, 318904, 347896, 379528, 414032,
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451672, 492736, 537536, 586408, 639720, 697880, 761328, 830544,
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906048, 988416, 1078272, 1176296, 1283232, 1399896, 1527160, 1665992,
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1817448, 1982672, 2162920, 2359552, 2574056, 2808064, 3063344, 3341832,
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3645640, 3977064, 4338616, 4733040, 5163320, 5632712, 6144776, 6703392,
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7312792, 7977592, 8702832, 9494000, 10357096, 11298656, 12325808, 13446336,
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14668736, 16002264, 17457016, 19044024, 20775304, 22663968, 24724328, 26972000,
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29424000, 32098912, 35017000, 38200368, 41673128, 45461600, 49594472, 54103064,
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59021528, 64387128, 70240504, 76626008, 83592008, 91191288, 99481408, 108525176,
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118391104, 129153936, 140895208, 153703864, 167676944, 182920304, 199549424, 217690280,
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237480312, 259069432, 282621200, 308314040, 336342592, 366919192, 400275488, 436664168,
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476360912, 519666456, 566908864, 618446040, 674668408, 736001904, 802911168, 875903096,
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955530656, 1042397080, 1137160456, 1240538680, 1353314928, 1476343560, 1610556616, 1756970856,
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1916695480, 2090940528, 2281026032, 2488392040, 2714609504, 2961392192, 3230609664, 3524301456,
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3844692504, 4194210008, 4575501832, 4991456544, 5445225320, 5940245808, 6480268160, 7069383448,
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7712054672, 8413150552, 9177982424, 10012344464, 10922557600, 11915517384, 12998746240, 14180450448,
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15469582312, 16875907976, 18410081432, 20083725200, 21909518400, 23901292800, 26074137600, 28444513752,
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31030378640, 33851322152, 36928715080, 40285871000, 43948222912, 47943515904, 52302017352, 57056746208,
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62243723136, 67902243424, 74075174648, 80809281440, 88155579752, 96169723368, 104912425496, 114449918728,
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124854456800, 136204861968, 148587122152, 162095042352, 176830955296, 192906496688, 210443450936, 229574673752};
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const int kAllocIndexLen = sizeof(AllocSizeIndex) / sizeof(AllocSizeIndex[0]);
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static_assert(kAllocIndexLen == 256, "Make sure alloc 8 bit is enough.");
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static_assert(AllocSizeIndex[255] > uint32_t(-1), "Make sure alloc size correct.");
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const int64_t kCenterInfoFixedAddress = 1024 * 4;
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const int64_t kShmMetaInfoFixedAddress = 1024 * 16;
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const boost::uuids::uuid kMetaInfoTag = boost::uuids::string_generator()("fc5007bd-0e62-4d91-95dc-948cf1f02e5a");
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struct BHomeMetaInfo {
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boost::uuids::uuid tag_;
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std::atomic<uint64_t> shm_id_;
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std::atomic<uint64_t> ssn_id_;
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};
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struct CenterMetaInfo {
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boost::uuids::uuid tag_;
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CenterInfo info_;
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};
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int64_t Addr(void *ptr) { return reinterpret_cast<int64_t>(ptr); }
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// void *Ptr(const int64_t offset) { return reinterpret_cast<void *>(offset); }
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template <class T = void>
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T *Ptr(const int64_t offset) { return reinterpret_cast<T *>(offset); }
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class FileLock
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{
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public:
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FileLock(const std::string &path) :
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fd_(Open(path))
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{
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if (fd_ == -1) { throw std::runtime_error("error open file:" + path); }
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}
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~FileLock() { Close(fd_); }
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bool try_lock() { return fd_ != -1 && (flock(fd_, LOCK_EX | LOCK_NB) == 0); }
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void unlock() { flock(fd_, LOCK_UN); }
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private:
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static int Open(const std::string &path) { return open(path.c_str(), O_RDONLY, 0666); }
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static int Close(int fd) { return close(fd); }
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int fd_;
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std::mutex mtx_;
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};
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SharedMemory &BHomeMetaShm()
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{
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static std::string name("bhshmq_meta_v0");
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static SharedMemory shm(name, 1024 * 128);
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return shm;
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}
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} // namespace
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CenterInfo *GetCenterInfo(SharedMemory &shm)
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{
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auto pmeta = Ptr<CenterMetaInfo>(kCenterInfoFixedAddress + Addr(shm.get_address()));
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if (pmeta->tag_ == kMetaInfoTag) {
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return &pmeta->info_;
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}
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return nullptr;
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}
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ShmSocket &DefaultSender(SharedMemory &shm)
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{
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typedef std::pair<void *, std::shared_ptr<ShmSocket>> Pair;
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static std::vector<Pair> store;
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static std::mutex s_mtx;
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thread_local Pair local_cache;
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if (local_cache.first == &shm) {
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return *local_cache.second;
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}
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std::lock_guard<std::mutex> lk(s_mtx);
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for (auto &kv : store) {
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if (kv.first == &shm) {
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local_cache = kv;
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return *local_cache.second;
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}
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}
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auto &mq = GetCenterInfo(shm)->mq_sender_;
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store.emplace_back(&shm, new ShmSocket(mq.offset_, shm, mq.id_));
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local_cache = store.back();
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return *local_cache.second;
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}
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BHomeMetaInfo *GetBHomeMeta()
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{
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auto p = Ptr<BHomeMetaInfo>(kShmMetaInfoFixedAddress + Addr(BHomeMetaShm().get_address()));
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return (p->tag_ == kMetaInfoTag) ? p : nullptr;
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}
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bool ShmMetaInit()
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{
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SharedMemory &shm = BHomeMetaShm();
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static FileLock fl("/dev/shm/" + shm.name());
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if (!fl.try_lock()) { // single center instance only.
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return false;
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}
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auto pmeta = GetBHomeMeta();
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if (pmeta && pmeta->tag_ == kMetaInfoTag) {
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// remove old shm
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SharedMemory::Remove(BHomeShmName());
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++pmeta->shm_id_; // inc shm id
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return true; // already exist.
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} else {
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Mutex *mutex = shm.FindOrCreate<Mutex>("bhshmq_meta_lock");
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if (!mutex || !mutex->try_lock()) {
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return false;
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}
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DEFER1(mutex->unlock());
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auto base = Addr(shm.get_address());
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auto offset = kShmMetaInfoFixedAddress;
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void *p = shm.Alloc(offset * 2);
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if (Addr(p) - base <= offset) {
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pmeta = new (Ptr(offset + base)) BHomeMetaInfo;
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pmeta->tag_ = kMetaInfoTag;
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pmeta->shm_id_ = 100;
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pmeta->ssn_id_ = 10000;
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return true;
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}
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}
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return false;
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}
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// put center info at fixed memory position.
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// as boost shm find object (find socket/mq by id, etc...) also locks inside,
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// which node might crash inside and cause deadlock.
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bool CenterInit()
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{
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if (!ShmMetaInit()) { return false; }
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SharedMemory &shm = BHomeShm();
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Mutex *mutex = shm.FindOrCreate<Mutex>("shm_center_lock");
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if (!mutex || !mutex->try_lock()) {
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return false;
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}
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DEFER1(mutex->unlock());
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auto pmeta = Ptr<CenterMetaInfo>(kCenterInfoFixedAddress + Addr(shm.get_address()));
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if (pmeta->tag_ == kMetaInfoTag) {
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return true;
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} else {
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auto base = Addr(shm.get_address());
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auto offset = kCenterInfoFixedAddress;
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void *p = shm.Alloc(offset * 2);
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if (Addr(p) - base <= offset) {
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pmeta = new (Ptr(offset + base)) CenterMetaInfo;
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auto &info = pmeta->info_;
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auto InitMQ = [&](auto &mq, auto &&id) {
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mq.id_ = id;
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ShmSocket tmp(shm, id, eOpenOrCreate);
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mq.offset_ = tmp.AbsAddr();
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};
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int id = 100;
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auto NextId = [&]() { return ++id; };
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InitMQ(info.mq_sender_, NextId());
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InitMQ(info.mq_center_, NextId());
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InitMQ(info.mq_bus_, NextId());
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pmeta->tag_ = kMetaInfoTag;
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return true;
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}
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}
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return false;
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}
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const MQInfo &BHTopicCenterAddress(SharedMemory &shm) { return GetCenterInfo(shm)->mq_center_; }
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const MQInfo &BHTopicBusAddress(SharedMemory &shm) { return GetCenterInfo(shm)->mq_bus_; }
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bool BHNodeInit(SharedMemory &shm, const int64_t request, int64_t &reply)
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{
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return GetCenterInfo(shm)->init_rr_.ClientRequest(request, reply);
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}
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void BHCenterHandleInit(SharedMemory &shm, std::function<int64_t(const int64_t)> const &onReq)
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{
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GetCenterInfo(shm)->init_rr_.ServerProcess(onReq);
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}
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int64_t CalcAllocIndex(int64_t size)
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{
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auto pos = std::lower_bound(AllocSizeIndex, AllocSizeIndex + kAllocIndexLen, size);
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return (pos == AllocSizeIndex + kAllocIndexLen) ? -1 : pos - AllocSizeIndex;
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}
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int64_t GetAllocSize(int index) { return index < kAllocIndexLen ? AllocSizeIndex[index] : 0; }
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std::string BHomeShmName()
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{
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auto bhome_meta = Ptr<BHomeMetaInfo>(kShmMetaInfoFixedAddress + Addr(BHomeMetaShm().get_address()));
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return "bhome_shmq_id_" + std::to_string(bhome_meta->shm_id_.load());
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}
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SharedMemory &BHomeShm()
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{
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static SharedMemory shm(BHomeShmName(), 1024 * 1024 * 512);
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return shm;
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}
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bool GlobalInit(SharedMemory &shm) { return GetCenterInfo(shm); }
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MQId NewSession() { return 10 * (++GetBHomeMeta()->ssn_id_); }
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void SetLastError(const int ec, const std::string &msg)
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{
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LastErrorStore().ec_ = ec;
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LastErrorStore().msg_ = msg;
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}
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void GetLastError(int &ec, std::string &msg)
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{
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ec = LastErrorStore().ec_;
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msg = LastErrorStore().msg_;
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}
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int NodeTimeoutSec() { return 60; }
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std::string BHLogDir() { return "/opt/vasystem/valog/"; }
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