easy_ringbuf_test.cpp

#include <stdio.h>
#include <vector>
#include <thread>
#include <mutex>
#include <condition_variable>

#include "easy_ringbuf.hpp"

class EasyRingBufYield {
public:
  EasyRingBufYield(size_t maxSize) {}
  inline void Wait(unsigned readed, unsigned wrote, bool forRead) { std::this_thread::yield(); }
  inline void Wakeup(unsigned readed, unsigned wrote) {}
};

class EasyRingBufWait {
protected:
  std::mutex _mutex;
  std::condition_variable _cv;
  bool _readIsWaiting = false;
  bool _writeIsWaiting = false;
  unsigned _size = 0;
  unsigned _max;
public:
  EasyRingBufWait(size_t maxSize) : _max(maxSize) {}
  inline void Wait(unsigned readed, unsigned wrote, bool forRead) {
    Wakeup(readed, wrote);
    std::unique_lock<std::mutex> lock(_mutex);
    if (forRead) {
      _cv.wait(lock, [this] () {
        _readIsWaiting = _size == 0;
        return !_readIsWaiting;
      });
    } else {
      _cv.wait(lock, [this] () {
        _writeIsWaiting = _size == _max;
        return !_writeIsWaiting;
      });
    }
  }
  inline void Wakeup(unsigned readed, unsigned wrote) {
    std::lock_guard<std::mutex> guard(_mutex);
    _size += wrote; _size -= readed;
    if ((_size > 0 && _readIsWaiting) || (_size < _max && _writeIsWaiting))
      _cv.notify_all();
  }
};

uint32_t crc32(const char* s, int len);

void randBuffer(std::vector<char> &buf) {
  uint32_t *pU32 = (uint32_t *)buf.data();
  for (size_t i = 0; i < buf.size() / 4; i++) {
    pU32[i] = rand();
  }
}

#if 0
#define DPRINT printf
#else
#define DPRINT(...)
#endif

template<typename T>
void verifyPong(T *ping, T *pong) {
  uint32_t size, checksum;
  std::vector<char> buffer;
  size_t count = 0;

  while (true) {
    DPRINT("pong start\n");
    ping->ReadLoop(size); DPRINT("pong readed size: %u\n", size);
    if (size == 0) break;
    ping->ReadLoop(checksum); DPRINT("pong readed checksum: %u\n", checksum);
    buffer.resize(size);
    ping->ReadLoop(buffer.data(), buffer.size()); DPRINT("pong readed data\n");

    if (crc32(&buffer[0], size) != checksum) {
      fprintf(stderr, "verifyPong ping checksum error\n");
      exit(-1);
    }

    randBuffer(buffer);
    checksum = crc32(&buffer[0], size);

    pong->WriteLoop(checksum); DPRINT("pong wrote checksum: %u\n", checksum);
    pong->WriteLoop(buffer.data(), buffer.size()); DPRINT("pong wrote data\n");

    if ((++count % 500) == 0) printf("pong: %zd\n", count);
  }
  printf("pong stopped %zd\n", count);
}

template<typename T>
void verifyPing(T *ping, T *pong, size_t loop, size_t limit) {
  uint32_t size, checksum;
  std::vector<char> buffer;
  size_t count = 0;

  for (size_t i = 0; i < loop; i++) {
    size = (rand() % limit) + 1;

    buffer.resize(size);
    randBuffer(buffer);
    checksum = crc32(&buffer[0], size);

    DPRINT("ping start\n");
    ping->WriteLoop(size); DPRINT("ping wrote size: %u\n", size);
    ping->WriteLoop(checksum); DPRINT("ping wrote checksum: %u\n", checksum);
    ping->WriteLoop(buffer.data(), buffer.size()); DPRINT("ping wrote data\n");

    pong->ReadLoop(checksum); DPRINT("ping readed checksum: %u\n", checksum);
    pong->ReadLoop(buffer.data(), buffer.size()); DPRINT("ping readed data\n");

    if (crc32(&buffer[0], size) != checksum) {
      fprintf(stderr, "verifyPing pong checksum error\n");
      exit(-1);
    }
    if ((++count % 500) == 0) printf("ping: %zd\n", count);
  }
  printf("ping stopped %zd\n", count);
  size = 0;
  ping->WriteLoop(size);
}

class Timestamp {
  const char *_name;
  std::chrono::time_point<std::chrono::high_resolution_clock> _start;
  std::chrono::time_point<std::chrono::high_resolution_clock> _stop;
public:
  Timestamp(const char *name) : _name(name) {}
  void Start() {
    _start = std::chrono::high_resolution_clock::now();
  }
  void Stop() {
    _stop = std::chrono::high_resolution_clock::now();
  }
  ~Timestamp() {
    auto diff = _stop - _start;
    long count = (long)std::chrono::duration_cast<std::chrono::milliseconds>(diff).count();
    printf("%s time: %ld s, %ld ms\n", _name, count / 1000, count % 1000);
  }
};

template<typename T>
void testPingPong(size_t pairs, size_t loopCount, size_t pingBufSize, size_t pongBufSize, size_t dataLimitSize) {

  std::vector<T *> pingRings, pongRings;
  std::vector<char *> pingBufs, pongBufs;
  std::vector<std::thread> pingThreads, pongThreads;

  for (size_t i = 0; i < pairs; i++) {
    pingBufs.push_back(new char[pingBufSize]);
    pingRings.push_back(new T(pingBufs.back(), pingBufSize));
    pongBufs.push_back(new char[pongBufSize]);
    pongRings.push_back(new T(pongBufs.back(), pongBufSize));

    pingThreads.emplace_back(verifyPing<T>, pingRings.back(), pongRings.back(), loopCount, dataLimitSize);
    pongThreads.emplace_back(verifyPong<T>, pingRings.back(), pongRings.back());
  }

  for (size_t i = 0; i < pingThreads.size(); i++) {
    pingThreads[i].join();
    pongThreads[i].join();
  }

  for (size_t i = 0; i < pingBufs.size(); i++) {
    delete [] pingBufs[i];
    delete [] pongBufs[i];
    delete pingRings[i];
    delete pongRings[i];
  }
}

int main(void) {
  size_t threadPairs = 16;
  size_t loopCount = 1000;
  size_t pingBufSize = 1024 * 8;
  size_t pongBufSize = 1024 * 4;
  size_t dataLimitSize = 1024 * 32;
  Timestamp t1("yield"), t2("wait"), t3("null");
  t1.Start();
  testPingPong< CEasyRingBuf<EasyRingBufYield> >(threadPairs, loopCount, pingBufSize, pongBufSize, dataLimitSize);
  t1.Stop(); t2.Start();
  testPingPong< CEasyRingBuf<EasyRingBufWait> >(threadPairs, loopCount, pingBufSize, pongBufSize, dataLimitSize);
  t2.Stop(); t3.Start();
  testPingPong< CEasyRingBuf<EasyRingBufNull> >(threadPairs, loopCount, pingBufSize, pongBufSize, dataLimitSize);
  t3.Stop();

  return 0;
}


static uint32_t crc32_tab[] =
{
    0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
    0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
    0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
    0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
    0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
    0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
    0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
    0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
    0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
    0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
    0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
    0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
    0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
    0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
    0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
    0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
    0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
    0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
    0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
    0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
    0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
    0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
    0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
    0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
    0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
    0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
    0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
    0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
    0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
    0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
    0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
    0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
    0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
    0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
    0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
    0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
    0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
    0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
    0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
    0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
    0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
    0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
    0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
    0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
    0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
    0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
    0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
    0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
    0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
    0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
    0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
    0x2d02ef8dL
};
/* crc32 hash */
uint32_t crc32(const char* s, int len)
{
    int i;
    uint32_t crc32val = 0;
    crc32val ^= 0xFFFFFFFF;

    for (i = 0;  i < len;  i++) {
        crc32val = crc32_tab[(crc32val ^ s[i]) & 0xFF] ^ ((crc32val >> 8) & 0x00FFFFFF);
    }

    return crc32val ^ 0xFFFFFFFF;
}