ni-leakdetector/nileakdetector.h

#pragma once

#include <stdio.h>
#include <stdlib.h>

#ifndef NILEAKDETECTOR_VERBOSE 
#define NILEAKDETECTOR_VERBOSE false
#endif

typedef struct _NILeakDetectorData {
    size_t n_malloc;
    size_t n_free;
} NILeakDetectorData;

static NILeakDetectorData nileakdetector_data = {
    .n_malloc = 0,
    .n_free = 0
};

// TODO: calloc, realloc
// TODO: pass __FILE__ and __LINE__ so it prints the location of the operations

void *nileakdetector_malloc(size_t block_size) {
    void *result = malloc(block_size);
    if (result == NULL) {
        if(NILEAKDETECTOR_VERBOSE)
            printf("[NILeakDetector] Erroneous Allocation (NULL)\n");
    } else {
        if(NILEAKDETECTOR_VERBOSE)
            printf("[NILeakDetector] Allocated %ld Bytes (%p)\n", block_size, result);
        nileakdetector_data.n_malloc++;
    }
    return result;
}

void nileakdetector_free(void *block) {
    free(block);
    if(NILEAKDETECTOR_VERBOSE)
        printf("[NILeakDetector] Freed pointer (%p)\n", block);
    nileakdetector_data.n_free++;
}

void nileakdetector_print_summary() {
    printf("[NILeakDetector] == SUMMARY ==\n");
    printf("[NILeakDetector] Number of mallocs: %ld\n", nileakdetector_data.n_malloc);
    printf("[NILeakDetector] Number of frees: %ld\n", nileakdetector_data.n_free);
    if (nileakdetector_data.n_malloc != nileakdetector_data.n_free) {
        printf("[NILeakDetector] WARNING: POSSIBLE MEMORY LEAKS\n");
    }
}

// TODO: nileakdetector_reset -> resets the counting to zero

#undef malloc
#undef free

#define malloc(sz) nileakdetector_malloc(sz)
#define free(p) nileakdetector_free(p)