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#include "core.h"
#ifdef ECP_WITH_PTHREAD
#include <sys/time.h>
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
#define MSG_NEXT(msgi, max_msgs) ((msgi + 1) % max_msgs)
static struct timespec *abstime_ts(struct timespec *ts, unsigned int msec) {
struct timeval tv;
uint64_t us_start;
gettimeofday(&tv, NULL);
us_start = tv.tv_sec * (uint64_t) 1000000 + tv.tv_usec;
us_start += msec * 1000;
ts->tv_sec = us_start / 1000000;
ts->tv_nsec = (us_start % 1000000) * 1000;
return ts;
}
int ecp_conn_msgq_create(ECPConnection *conn) {
int i;
for (i=0; i<ECP_MAX_MTYPE; i++) {
int rv = pthread_cond_init(&conn->msgq.cond[i], NULL);
if (rv) {
int j;
for (j=0; j<i; j++) {
pthread_cond_destroy(&conn->msgq.cond[j]);
}
return ECP_ERR;
}
}
return ECP_OK;
}
void ecp_conn_msgq_destroy(ECPConnection *conn) {
int i;
for (i=0; i<ECP_MAX_MTYPE; i++) {
pthread_cond_destroy(&conn->msgq.cond[i]);
}
}
ssize_t ecp_conn_msgq_push(ECPConnection *conn, unsigned char *msg, size_t msg_size) {
ECPConnMsgQ *msgq = &conn->msgq;
unsigned short msg_idx = msgq->empty_idx;
unsigned short i;
unsigned short done = 0;
unsigned char mtype;
if (msg_size == 0) return ECP_OK;
mtype = *msg;
msg++;
msg_size--;
if (mtype >= ECP_MAX_MTYPE) return ECP_ERR_MAX_MTYPE;
if (msg_size >= ECP_MAX_MSG) return ECP_ERR_MAX_MSG;
if (msg_size < ECP_MIN_MSG) return ECP_ERR_MIN_MSG;
for (i=0; i<ECP_MAX_CONN_MSG; i++) {
if (!msgq->occupied[msg_idx]) {
ECPMessage *message = &msgq->msg[msg_idx];
if (msg_size > 0) memcpy(message->msg, msg, msg_size);
message->size = msg_size;
if (msgq->r_idx[mtype] == msgq->w_idx[mtype]) pthread_cond_signal(&msgq->cond[mtype]);
msgq->msg_idx[mtype][msgq->w_idx[mtype]] = msg_idx;
msgq->w_idx[mtype] = MSG_NEXT(msgq->w_idx[mtype], ECP_MAX_CONN_MSG+1);
msgq->empty_idx = MSG_NEXT(msg_idx, ECP_MAX_CONN_MSG);
msgq->occupied[msg_idx] = 1;
done = 1;
break;
}
msg_idx = MSG_NEXT(msg_idx, ECP_MAX_CONN_MSG);
}
if (done) {
return msg_size+1;
} else {
return ECP_ERR_MAX_CONN_MSG;
}
}
ssize_t ecp_conn_msgq_pop(ECPConnection *conn, unsigned char mtype, unsigned char *msg, size_t msg_size, unsigned int timeout) {
ECPConnMsgQ *msgq = &conn->msgq;
ECPMessage *message;
ssize_t rv = ECP_OK;
unsigned short msg_idx;
if (mtype >= ECP_MAX_MTYPE) return ECP_ERR_MAX_MTYPE;
if (msgq->r_idx[mtype] == msgq->w_idx[mtype]) {
if (timeout == -1) {
pthread_cond_wait(&msgq->cond[mtype], &conn->mutex);
} else {
struct timespec ts;
int _rv = pthread_cond_timedwait(&msgq->cond[mtype], &conn->mutex, abstime_ts(&ts, timeout));
if (_rv) rv = ECP_ERR_TIMEOUT;
}
}
if (!rv) {
msg_idx = msgq->msg_idx[mtype][msgq->r_idx[mtype]];
msgq->r_idx[mtype] = MSG_NEXT(msgq->r_idx[mtype], ECP_MAX_CONN_MSG+1);
msgq->occupied[msg_idx] = 0;
message = &msgq->msg[msg_idx];
rv = message->size;
if (rv >= 0) {
rv = MIN(msg_size, rv);
memcpy(msg, message->msg, rv);
}
}
return rv;
}
#endif /* ECP_WITH_PTHREAD */
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