sync.h

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#pragma once
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

#define SYS_MUTEX_CTX_SIZE 64

#define SYS_COND_CTX_SIZE 64

#define SYS_WAITGROUP_CTX_SIZE 128 // Larger to hold mutex + cond + counter

typedef struct {
  bool init; 
  union {
    uint8_t
        ctx[SYS_MUTEX_CTX_SIZE]; 
    uint64_t align;              
  };
} sys_mutex_t;

typedef struct {
  bool init; 
  union {
    uint8_t
        ctx[SYS_COND_CTX_SIZE]; 
    uint64_t align;             
  };
} sys_cond_t;

typedef struct {
  bool init; 
  union {
    uint8_t ctx[SYS_WAITGROUP_CTX_SIZE]; 
    uint64_t align;                      
  };
} sys_waitgroup_t;

sys_mutex_t sys_mutex_init(void);

bool sys_mutex_lock(sys_mutex_t *mutex);

bool sys_mutex_trylock(sys_mutex_t *mutex);

bool sys_mutex_unlock(sys_mutex_t *mutex);

void sys_mutex_finalize(sys_mutex_t *mutex);

sys_cond_t sys_cond_init(void);

bool sys_cond_wait(sys_cond_t *cond, sys_mutex_t *mutex);

bool sys_cond_timedwait(sys_cond_t *cond, sys_mutex_t *mutex,
                        uint32_t timeout_ms);

bool sys_cond_signal(sys_cond_t *cond);

bool sys_cond_broadcast(sys_cond_t *cond);

void sys_cond_finalize(sys_cond_t *cond);

sys_waitgroup_t sys_waitgroup_init(void);

bool sys_waitgroup_add(sys_waitgroup_t *wg, int delta);

bool sys_waitgroup_done(sys_waitgroup_t *wg);

void sys_waitgroup_finalize(sys_waitgroup_t *wg);

#ifdef __cplusplus
}
#endif