src/ring_buffer.h

   1 #ifndef RING_BUFFER_H_
   2 #define RING_BUFFER_H_
   3
   4 #include <assert.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <stdint.h>
   8 #include <string.h>
   9
  10 typedef void (*RingBufferDtor)(void *element);
  11
  12 typedef struct {
  13     size_t element_size;
  14     size_t capacity;
  15     size_t count;
  16     size_t begin;
  17     uint8_t *data;
  18     RingBufferDtor dtor;
  19 } RingBuffer;
  20
  21 static inline
  22 RingBuffer create_ring_buffer(size_t element_size,
  23                               size_t capacity,
  24                               RingBufferDtor dtor)
  25 {
  26     RingBuffer result = {0};
  27     result.element_size = element_size;
  28     result.capacity = capacity;
  29     result.dtor = dtor;
  30     result.data = malloc(result.element_size * result.capacity);
  31     return result;
  32 }
  33
  34 static inline
  35 void destroy_ring_buffer(RingBuffer buffer)
  36 {
  37     free(buffer.data);
  38 }
  39
  40 void ring_buffer_push(RingBuffer *buffer, void *element);
  41 int ring_buffer_pop(RingBuffer *buffer);
  42 void *ring_buffer_top(RingBuffer *buffer);
  43
  44 #endif  // RING_BUFFER_H_