tests/util_allocator.h

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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#ifndef UCX_TEST_UTIL_ALLOCATOR_H
#define UCX_TEST_UTIL_ALLOCATOR_H

#include "cx/allocator.h"

#ifdef __cplusplus
#extern "C" {
#endif

typedef struct CxTestingAllocator {
    CxAllocator base;
    /**
     * Total number of all allocations (malloc, calloc, realloc).
     * A realloc() does only count when the memory has to be moved.
     */
    unsigned alloc_total;
    /**
     * Number of failed allocations (malloc, calloc, realloc).
     */
    unsigned alloc_failed;
    /**
     * Total number of freed pointers.
     * A reallocation also counts as a free when the memory has to be moved.
     */
    unsigned free_total;
    /**
     * Number of failed free invocations.
     * A free() is considered failed, if it has not been performed on tracked memory.
     */
    unsigned free_failed;
    /**
     * The number of currently tracked memory blocks.
     */
    size_t tracked_count;
    /**
     * The capaciyty of the \c tracked array.
     */
    size_t tracked_capacity;
    /**
     * The set of tracked memory blocks.
     */
    void **tracked;
} CxTestingAllocator;


/**
 * Initializes a new testing allocator.
 */
void cx_testing_allocator_init(CxTestingAllocator *alloc);

/**
 * Destroys a testing allocator.
 */
void cx_testing_allocator_destroy(CxTestingAllocator *alloc);

/**
 * Verifies that this allocator has been used.
 *
 * @return true if any allocation was attempted using this allocator
 */
bool cx_testing_allocator_used(CxTestingAllocator const *alloc);

/**
 * Verifies that all allocated memory blocks are freed and no free occurred twice.
 *
 * @return true iff all tracked allocations / deallocations were valid
 */
bool cx_testing_allocator_verify(CxTestingAllocator const *alloc);

#ifdef __cplusplus
} // extern "C"
#endif

#endif // UCX_TEST_UTIL_ALLOCATOR_H