ciabatta/inc/threads.h

#pragma once

#include <time.h>
#include <stdbool.h>
#include <stdatomic.h>

#define thread_local _Thread_local
#define ONCE_FLAG_INIT 1

#define TSS_DTOR_ITERATIONS 32

typedef struct cnd_t {
	int idk_yet;
} cnd_t;

typedef struct thrd_t {
#if defined(_WIN32)
    void* handle;
#else
#error "C11 thread has not been implemented on this platform"
#endif
} thrd_t;

typedef struct tss_t {
	int idk_yet;
} tss_t;

typedef struct mtx_t {
#if defined(_WIN32)
    int type;
    // Done to handle recursive mutexes
    unsigned long recursion;
    unsigned long owner;
    atomic_int counter;
    void* semaphore;
#else
#error "C11 mutex has not been implemented on this platform"
#endif
} mtx_t;

typedef void(*tss_dtor_t)(void*);
typedef int(*thrd_start_t)(void*);

// TODO: change this maybe?
typedef int once_flag;

enum {
    mtx_plain     = 1,
    mtx_recursive = 2,
    mtx_timed     = 4
};

enum {
	thrd_success,
	thrd_timedout,
	thrd_busy,
	thrd_error,
	thrd_nomem
};

void call_once(once_flag *flag, void (*func)(void));

int cnd_broadcast(cnd_t *cond);
void cnd_destroy(cnd_t *cond);
int cnd_init(cnd_t *cond);
int cnd_signal(cnd_t *cond);
int cnd_timedwait(cnd_t *restrict cond, mtx_t *restrict mtx, const struct timespec *restrict ts);
int cnd_wait(cnd_t *cond, mtx_t *mtx);

void mtx_destroy(mtx_t *mtx);
int mtx_init(mtx_t *mtx, int type);
int mtx_lock(mtx_t *mtx);
int mtx_timedlock(mtx_t *restrict mtx, const struct timespec *restrict ts);
int mtx_trylock(mtx_t *mtx);
int mtx_unlock(mtx_t *mtx);

int thrd_create(thrd_t *thr, thrd_start_t func, void *arg);
thrd_t thrd_current(void);
int thrd_detach(thrd_t thr);
int thrd_equal(thrd_t thr0, thrd_t thr1);
_Noreturn void thrd_exit(int res);
int thrd_join(thrd_t thr, int *res);
int thrd_sleep(const struct timespec *duration, struct timespec *remaining);
void thrd_yield(void);

int tss_create(tss_t *key, tss_dtor_t dtor);
void tss_delete(tss_t key);
void *tss_get(tss_t key);
int tss_set(tss_t key, void *val);