memory_manager.c

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#include "common.h"
 
static t_mem_manager memer; 
 
void mem_init() 
{ 
    memer.mem_record = NULL;
    memer.alloc_count = 0;
    memer.free_count = 0;
}
 
void mem_finit(void) 
{
    t_mem_record *iter = NULL;
    mem_alloc_report();
    if (memer.mem_record != NULL) {
        for (iter = memer.mem_record ; iter != NULL; iter = iter->next) {
            printf("cleaning up allocated memory space @{%s:%d} [%lu Byte(s)] - %p\n", 
                    iter->file, iter->line, iter->block_size, iter->mem);
            os_free(iter);
        }
    }
    memer.alloc_count = 0;
    memer.free_count = 0;
 
}
 
t_gen tag_alloc(size_t nmemb, size_t size, char *file, int line)
{
    //TODO:add resource lock
    t_mem_record *new_mem = os_alloc(1, sizeof(t_mem_record));
    if (new_mem == NULL) {
        printf("Memory allocation for tracker failed\n");
    }
    new_mem->nmemb = nmemb;
    new_mem->block_size = size;
    new_mem->file = file;
    new_mem->line = line;
    new_mem->next = NULL;
 
    new_mem->mem = os_alloc(nmemb, size);
    if (new_mem->mem == NULL) {
        printf("Memory allocation failed\n");
    }
    else {
        memer.alloc_count++;
        new_mem->next = memer.mem_record;
        memer.mem_record = new_mem;
    }
 
 
    return (new_mem->mem);
 
}
 
 
 
void untag_alloc(void *mem_addr, char *file, int line)
{
    t_mem_record * mem_list = NULL, *prev_addr = NULL;
    if (memer.mem_record == NULL)
        return;
 
    for (mem_list = memer.mem_record; mem_list != NULL; prev_addr = mem_list, mem_list = mem_list->next) {
        if (mem_addr == mem_list->mem) {
 
            if (mem_addr == memer.mem_record->mem) {
                memer.mem_record = mem_list->next;
            }
            else {
                prev_addr->next = mem_list->next;
            }
 
            if (mem_addr)   {
                os_free(mem_addr);
                mem_addr = NULL;
                memer.free_count++;
            }
 
            os_free(mem_list);
        }
    }
}
 
 
void mem_alloc_report(void)
{
    printf("allocations = %4d , freed allocations = %4d\n", 
               memer.alloc_count, memer.free_count);
}