Refcount220323, C (gcc)

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//gcc 7.4.0

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

typedef struct _tagAPPLICATION APPLICATION, *PAPPLICATION;
typedef struct _tagREFCOUNT REFCOUNT, *PREFCOUNT;

struct _tagREFCOUNT {
    void (*deleter)(void *);
    void *ptr;
    int count;
};

struct _tagAPPLICATION {
    REFCOUNT refCount;
    char *str;
};

void Application_Deleter(PAPPLICATION);
static inline void Application_Pull(PAPPLICATION);

static inline void RefCount_SetDeleter(PREFCOUNT refCount, void (*deleter)(void *))
{
    refCount->deleter = deleter;   
}

static inline void RefCount_SetPtr(PREFCOUNT refCount, void* ptr)
{
    refCount->ptr = ptr;
}

static inline void RefCount_Init(PREFCOUNT refCount, void* ptr, void (*deleter)(void *))
{
    refCount->ptr = ptr;
    refCount->deleter = deleter;
    refCount->count = 1;
}

static inline void RefCount_Increase(PREFCOUNT refCount)
{
    ++refCount->count;
}

static inline void RefCount_Decrease(PREFCOUNT refCount)
{
    if ((--refCount->count) == 0) {
        refCount->deleter(refCount->ptr);   
    }
}

PAPPLICATION *Application__get()
{
    static PAPPLICATION g_pApp;
    
    return &g_pApp;
}

void Application_Initialize(PAPPLICATION pApp)
{
    pApp->str = "Initialized";
}

PAPPLICATION Application_Create()
{
    PAPPLICATION *ppApp = NULL;
    ppApp = Application__get();
    if (!ppApp || *ppApp) {
        assert(false);
        return NULL;
    }
    
    *ppApp = calloc(1, sizeof(APPLICATION));
    RefCount_Init(&(*ppApp)->refCount, *ppApp, (void (*)(void *)) Application_Deleter);
    
    Application_Initialize(*ppApp);
    
    return *ppApp;
}

PAPPLICATION Application_GetInstance()
{    
    PAPPLICATION *ppApp;
    
    ppApp = Application__get();
    if (!*ppApp) {
       assert(false);
       return NULL;
    }
    
    Application_Pull(*ppApp);
    return *ppApp;
}

const char *Application_GetString(PAPPLICATION pApp)
{
    return pApp->str;   
}

void Application_ChangeState(PAPPLICATION pApp)
{
    pApp->str = "Blue Archive";
}

void Application_Deleter(PAPPLICATION pApp)
{
    PAPPLICATION *ppApp;
    ppApp = Application__get();
    if (ppApp) {
        *ppApp = NULL;
    }
    
    printf("Destroying application...\n");
    
    free(pApp);
}

static inline void Application_Put(PAPPLICATION pApp)
{
    RefCount_Decrease(&(pApp->refCount));
}

static inline void Application_Pull(PAPPLICATION pApp)
{
    RefCount_Increase(&(pApp->refCount));
}

void GetInfo()
{
    PAPPLICATION pApp;
    pApp = Application_GetInstance();
    
    printf("Information: %s\n", pApp->str);
    
    Application_Put(pApp);
}

int main(void)
{
    PAPPLICATION pApp = Application_Create();
 
    GetInfo();
    
    Application_Put(pApp);
    return 0;
}

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Compilation time: 0.12 sec, absolute running time: 0.18 sec, cpu time: 0.01 sec, memory peak: 5 Mb, absolute service time: 0,42 sec