note.h

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#pragma once
 
#include <kernel/config.h>
#include <kernel/cpu/interrupt.h>
#include <kernel/sync/lock.h>
 
#include <sys/io.h>
#include <sys/proc.h>
 
typedef struct cpu cpu_t;
 
#define NOTE_MAX_BUFFER 64
 
typedef enum
{
    NOTE_QUEUE_NONE = 0,
    NOTE_QUEUE_RECIEVED_KILL = 1 << 0,
} note_queue_flag_t;
 
typedef struct note
{
    uint8_t buffer[NOTE_MAX_BUFFER];
    uint16_t length;
    pid_t sender;
} note_t;
 
typedef struct
{
    note_t notes[CONFIG_MAX_NOTES];
    uint64_t readIndex;
    uint64_t writeIndex;
    uint64_t length;
    note_queue_flag_t flags;
    lock_t lock;
} note_queue_t;
 
void note_queue_init(note_queue_t* queue);
 
uint64_t note_queue_length(note_queue_t* queue);
 
uint64_t note_queue_write(note_queue_t* queue, const void* buffer, uint64_t count);
 
void note_interrupt_handler(interrupt_frame_t* frame, cpu_t* self);