/*
    Copyright (c) 2005-2021 Intel Corporation

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

#define MAX_THREADS 1024
#define NUM_OF_BINS 30
#define ThreadCommonCounters NUM_OF_BINS

enum counter_type {
    allocBlockNew = 0,
    allocBlockPublic,
    allocBumpPtrUsed,
    allocFreeListUsed,
    allocPrivatized,
    examineEmptyEnough,
    examineNotEmpty,
    freeRestoreBumpPtr,
    freeByOtherThread,
    freeToActiveBlock,
    freeToInactiveBlock,
    freeBlockPublic,
    freeBlockBack,
    MaxCounters
};
enum common_counter_type {
    allocNewLargeObj = 0,
    allocCachedLargeObj,
    cacheLargeObj,
    freeLargeObj,
    lockPublicFreeList,
    freeToOtherThread
};

#if COLLECT_STATISTICS
/* Statistics reporting callback registered via a static object dtor
   on Posix or DLL_PROCESS_DETACH on Windows.
 */

static bool reportAllocationStatistics;

struct bin_counters {
    int counter[MaxCounters];
};

static bin_counters statistic[MAX_THREADS][NUM_OF_BINS+1]; //zero-initialized;

static inline int STAT_increment(int thread, int bin, int ctr)
{
    return reportAllocationStatistics && thread < MAX_THREADS ? ++(statistic[thread][bin].counter[ctr]) : 0;
}

static inline void initStatisticsCollection() {
#if defined(MALLOCENV_COLLECT_STATISTICS)
    if (NULL != getenv(MALLOCENV_COLLECT_STATISTICS))
        reportAllocationStatistics = true;
#endif
}

#else
#define STAT_increment(a,b,c) ((void)0)
#endif /* COLLECT_STATISTICS */

#if COLLECT_STATISTICS
static inline void STAT_print(int thread)
{
    if (!reportAllocationStatistics)
        return;

    char filename[100];
#if USE_PTHREAD
    sprintf(filename, "stat_ScalableMalloc_proc%04d_thr%04d.log", getpid(), thread);
#else
    sprintf(filename, "stat_ScalableMalloc_thr%04d.log", thread);
#endif
    FILE* outfile = fopen(filename, "w");
    for(int i=0; i<NUM_OF_BINS; ++i)
    {
        bin_counters& ctrs = statistic[thread][i];
        fprintf(outfile, "Thr%04d Bin%02d", thread, i);
        fprintf(outfile, ": allocNewBlocks %5d", ctrs.counter[allocBlockNew]);
        fprintf(outfile, ", allocPublicBlocks %5d", ctrs.counter[allocBlockPublic]);
        fprintf(outfile, ", restoreBumpPtr %5d", ctrs.counter[freeRestoreBumpPtr]);
        fprintf(outfile, ", privatizeCalled %10d", ctrs.counter[allocPrivatized]);
        fprintf(outfile, ", emptyEnough %10d", ctrs.counter[examineEmptyEnough]);
        fprintf(outfile, ", notEmptyEnough %10d", ctrs.counter[examineNotEmpty]);
        fprintf(outfile, ", freeBlocksPublic %5d", ctrs.counter[freeBlockPublic]);
        fprintf(outfile, ", freeBlocksBack %5d", ctrs.counter[freeBlockBack]);
        fprintf(outfile, "\n");
    }
    for(int i=0; i<NUM_OF_BINS; ++i)
    {
        bin_counters& ctrs = statistic[thread][i];
        fprintf(outfile, "Thr%04d Bin%02d", thread, i);
        fprintf(outfile, ": allocBumpPtr %10d", ctrs.counter[allocBumpPtrUsed]);
        fprintf(outfile, ", allocFreeList %10d", ctrs.counter[allocFreeListUsed]);
        fprintf(outfile, ", freeToActiveBlk %10d", ctrs.counter[freeToActiveBlock]);
        fprintf(outfile, ", freeToInactive  %10d", ctrs.counter[freeToInactiveBlock]);
        fprintf(outfile, ", freedByOther %10d", ctrs.counter[freeByOtherThread]);
        fprintf(outfile, "\n");
    }
    bin_counters& ctrs = statistic[thread][ThreadCommonCounters];
    fprintf(outfile, "Thr%04d common counters", thread);
    fprintf(outfile, ": allocNewLargeObject %5d", ctrs.counter[allocNewLargeObj]);
    fprintf(outfile, ": allocCachedLargeObject %5d", ctrs.counter[allocCachedLargeObj]);
    fprintf(outfile, ", cacheLargeObject %5d", ctrs.counter[cacheLargeObj]);
    fprintf(outfile, ", freeLargeObject %5d", ctrs.counter[freeLargeObj]);
    fprintf(outfile, ", lockPublicFreeList %5d", ctrs.counter[lockPublicFreeList]);
    fprintf(outfile, ", freeToOtherThread %10d", ctrs.counter[freeToOtherThread]);
    fprintf(outfile, "\n");

    fclose(outfile);
}
#endif