stasis-aries-wal/test/stasis/check_ringbuffer.c

/*---
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---*/
#include "../check_includes.h"

#include <stasis/experimental/ringbuffer.h>

#include <assert.h>
#include <sys/time.h>
#include <time.h>

#define LOG_NAME   "check_ringbuffer.log"

/**
   @test

*/

#define NUM_ENTRIES 10000


static int rb_test(double readBlock, double writeBlock) {

  int i;
  byte ** array = stasis_malloc(NUM_ENTRIES, byte*);
  int * length = stasis_malloc(NUM_ENTRIES, int);
  for(i = 0; i < NUM_ENTRIES; i++) {
    length[i] =1.0+ 1000.0 * (double)rand() / (double)RAND_MAX;
    array[i] = stasis_malloc(length[i], byte);
    int j;
    for(j = 0; j < length[i]; j++) {
      array[i][j] = i + j;
    }
  }

  ringBufferLog_t * log = openLogRingBuffer(NUM_ENTRIES, 5);

  int doneReading = 0;
  int doneWriting = 0;
  int readPos = 0;
  int writePos = 0;
  while(!doneReading) {
    if(!doneWriting) {
      int numToWrite = 1.0 + writeBlock * (rand() / RAND_MAX);
      //      printf("%d\n", numToWrite);
      for(i = 0; i < numToWrite; i++) {
	if(!ringBufferAppend(log, array[writePos], length[writePos])) {
	  //	  printf("W"); fflush(stdout);
          if(writePos == 0) {
            assert((-2 == ringBufferAppend(log, array[writePos], 1+NUM_ENTRIES - length[writePos])));
          }
	  writePos++;
	  if(writePos ==  NUM_ENTRIES) { break; }
	} else {
	  break;
	}
      }
    }
    // try to truncate a chunk longer than the whole ringbuffer.
    // should be a no-op

    // note: passing 0 for buffer argument is illegal
    assert(-1 == ringBufferTruncateRead(0, log, NUM_ENTRIES * 10));

    // try to append more than the ring buffer can hold
    // should also be a no-op.
    assert(-1 == ringBufferAppend(log, 0, NUM_ENTRIES * 10));


    int numToRead = 1.0 + readBlock * ((double)rand() / (double)RAND_MAX);
    //    printf("%d\n", numToRead);
    for(i = 0; i < numToRead; i++) {
      byte * buf = stasis_malloc(length[readPos], byte);
      if(!ringBufferTruncateRead(buf, log, length[readPos])) {
	int j;
	for(j = 0; j < length[readPos]; j++) {
	  assert(buf[j] == array[readPos][j]);
	}
	free(buf);
	//	printf("R"); fflush(stdout);

	readPos++;
	if(readPos == NUM_ENTRIES) { break; }
      } else {
	break;
      }
    }
    if(readPos == NUM_ENTRIES) {
      doneReading = 1;
    }
    if(writePos == NUM_ENTRIES) {
      doneWriting = 1;
    }
  }
  closeLogRingBuffer(log);
  return 0;
}

START_TEST(ringBufferTest)
{
  struct timeval tv;
  gettimeofday(&tv, NULL);

  srand(tv.tv_sec + tv.tv_usec);

  printf("\nRunning balanced test.\n");
  rb_test(5.0,5.0);
  printf("Running read-intensive test.\n");
  rb_test(10.0, 1.0);
  printf("Running write-intensive test.\n");
  rb_test(1.0, 10);
} END_TEST


Suite * check_suite(void) {
  Suite *s = suite_create("ringBuffer");
  /* Begin a new test */
  TCase *tc = tcase_create("ringBuffer");

  /* Sub tests are added, one per line, here */

  tcase_add_test(tc, ringBufferTest);

  /* --------------------------------------------- */

  tcase_add_checked_fixture(tc, setup, teardown);


  suite_add_tcase(s, tc);
  return s;
}

#include "../check_setup.h"