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Added volatile qualifier to ringbuffer library to be interrupt safe.

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This commit is contained in:
skarg
2012-02-10 22:10:17 +00:00
parent 9226159c5d
commit 2e6a060b26
2 changed files with 20 additions and 20 deletions
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bacnet-stack/include/ringbuf.h
+9 -9
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@@ -46,8 +46,8 @@ struct ring_buffer_t {
volatile uint8_t * buffer; /* block of memory or array of data */
unsigned element_size; /* how many bytes for each chunk */
unsigned element_count; /* number of chunks of data */
volatile unsigned head; /* where the writes go */
volatile unsigned tail; /* where the reads come from */
volatile unsigned head; /* where the writes go */
volatile unsigned tail; /* where the reads come from */
};
typedef struct ring_buffer_t RING_BUFFER;
@@ -55,21 +55,21 @@ typedef struct ring_buffer_t RING_BUFFER;
extern "C" {
#endif /* __cplusplus */
unsigned Ringbuf_Count(
unsigned Ringbuf_Count (
RING_BUFFER const *b);
bool Ringbuf_Full(
bool Ringbuf_Full (
RING_BUFFER const *b);
bool Ringbuf_Empty(
RING_BUFFER const *b);
uint8_t *Ringbuf_Get_Front(
volatile uint8_t *Ringbuf_Get_Front(
RING_BUFFER const *b);
uint8_t *Ringbuf_Pop_Front(
volatile uint8_t *Ringbuf_Pop_Front(
RING_BUFFER * b);
bool Ringbuf_Put(
RING_BUFFER * b, /* ring buffer structure */
uint8_t * data_element); /* one element to add to the ring */
uint8_t *Ringbuf_Alloc(
RING_BUFFER * b);
volatile uint8_t *data_element); /* one element to add to the ring */
volatile uint8_t *Ringbuf_Alloc(
RING_BUFFER *b);
/* Note: element_count must be a power of two */
void Ringbuf_Init(
RING_BUFFER * b, /* ring buffer structure */