40 lines
650 B
C
40 lines
650 B
C
#pragma once
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#include <sys/atomic.h>
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#include <sys/errno.h>
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#include <stdint.h>
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typedef struct {
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uint16_t size;
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uint16_t pos;
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uint8_t *buffer;
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} buffer_t;
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static inline int buffer_set(buffer_t *buffer,void *mem,int size){
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if (buffer){
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ATOMIC
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buffer->buffer = mem;
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buffer->pos = 0;
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buffer->size = size;
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return ESUCCESS;
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};
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return -ENULLPTR;
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};
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static inline int buffer_pos(buffer_t *buffer){
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ATOMIC
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return (buffer) ? buffer->pos : -ENULLPTR;
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};
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static inline int buffer_free(buffer_t *buffer){
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ATOMIC
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return (buffer) ? (buffer->size - buffer->pos) : -ENULLPTR;
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};
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#define buffer_byte(b) ((b)->buffer[(b)->pos++])
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