mutex.h

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#pragma once
 
#include <kernel/sched/wait.h>
#include <kernel/sync/lock.h>
 
#include <stdbool.h>
 
typedef struct thread thread_t;
 
#define MUTEX_SCOPE(mutex) \
    __attribute__((cleanup(mutex_cleanup))) mutex_t* CONCAT(m, __COUNTER__) = (mutex); \
    mutex_acquire((mutex))
 
#define MUTEX_CREATE {.waitQueue = WAIT_QUEUE_CREATE, .owner = NULL, .depth = 0, .lock = LOCK_CREATE}
 
typedef struct
{
    wait_queue_t waitQueue;
    thread_t* owner;
    uint32_t depth;
    lock_t lock;
} mutex_t;
 
void mutex_init(mutex_t* mtx);
 
void mutex_deinit(mutex_t* mtx);
 
void mutex_acquire(mutex_t* mtx);
 
bool mutex_acquire_timeout(mutex_t* mtx, clock_t timeout);
 
void mutex_release(mutex_t* mtx);
 
static inline void mutex_cleanup(mutex_t** mtx)
{
    mutex_release(*mtx);
}