1 files changed, 69 insertions, 0 deletions
diff --git a/code/esp32/components/eos/msgq.c b/code/esp32/components/eos/msgq.c
new file mode 100644
index 0000000..c704399
--- /dev/null
+++ b/code/esp32/components/eos/msgq.c
@@ -0,0 +1,69 @@
+#include <stdlib.h>
+
+#include "eos.h"
+#include "msgq.h"
+
+#define IDX_MASK(IDX, SIZE)     ((IDX) & ((SIZE) - 1))
+
+void eos_msgq_init(EOSMsgQ *msgq, EOSMsgItem *array, uint8_t size) {
+    msgq->idx_r = 0;
+    msgq->idx_w = 0;
+    msgq->size = size;
+    msgq->array = array;
+}
+
+int eos_msgq_push(EOSMsgQ *msgq, unsigned char type, unsigned char *buffer, uint16_t len, uint8_t flags) {
+    if ((uint8_t)(msgq->idx_w - msgq->idx_r) == msgq->size) return EOS_ERR_FULL;
+
+    uint8_t idx = IDX_MASK(msgq->idx_w, msgq->size);
+    msgq->array[idx].type = type;
+    msgq->array[idx].buffer = buffer;
+    msgq->array[idx].len = len;
+    msgq->array[idx].flags = flags;
+    msgq->idx_w++;
+    return EOS_OK;
+}
+
+void eos_msgq_pop(EOSMsgQ *msgq, unsigned char *type, unsigned char **buffer, uint16_t *len, uint8_t *flags) {
+    if (msgq->idx_r == msgq->idx_w) {
+        *type = 0;
+        *buffer = NULL;
+        *len = 0;
+        if (flags) *flags = 0;
+    } else {
+        uint8_t idx = IDX_MASK(msgq->idx_r, msgq->size);
+        *type = msgq->array[idx].type;
+        *buffer = msgq->array[idx].buffer;
+        *len = msgq->array[idx].len;
+        if (flags) *flags = msgq->array[idx].flags;
+        msgq->idx_r++;
+    }
+}
+
+uint8_t eos_msgq_len(EOSMsgQ *msgq) {
+    return (uint8_t)(msgq->idx_w - msgq->idx_r);
+}
+
+void eos_bufq_init(EOSBufQ *bufq, unsigned char **array, uint8_t size) {
+    bufq->idx_r = 0;
+    bufq->idx_w = 0;
+    bufq->size = size;
+    bufq->array = array;
+}
+
+int eos_bufq_push(EOSBufQ *bufq, unsigned char *buffer) {
+    if ((uint8_t)(bufq->idx_w - bufq->idx_r) == bufq->size) return EOS_ERR_FULL;
+
+    bufq->array[IDX_MASK(bufq->idx_w++, bufq->size)] = buffer;
+    return EOS_OK;
+}
+
+unsigned char *eos_bufq_pop(EOSBufQ *bufq) {
+    if (bufq->idx_r == bufq->idx_w) return NULL;
+
+    return bufq->array[IDX_MASK(bufq->idx_r++, bufq->size)];
+}
+
+uint8_t eos_bufq_len(EOSBufQ *bufq) {
+    return (uint8_t)(bufq->idx_w - bufq->idx_r);
+}