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#include "core.h"
#ifdef ECP_WITH_MSGQ
#include <sys/time.h>
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
#define MSG_IDX_MASK(idx) ((idx) & ((ECP_MSGQ_MAX_MSG) - 1))
static struct timespec *abstime_ts(struct timespec *ts, ecp_cts_t 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(ECPConnMsgQ *msgq) {
int i;
int rv;
if (msgq == NULL) return ECP_ERR;
memset(msgq, 0, sizeof(ECPConnMsgQ));
rv = pthread_mutex_init(&msgq->mutex, NULL);
if (rv) return ECP_ERR;
for (i=0; i<ECP_MAX_MTYPE; i++) {
rv = pthread_cond_init(&msgq->cond[i], NULL);
if (rv) {
int j;
for (j=0; j<i; j++) {
pthread_cond_destroy(&msgq->cond[j]);
}
pthread_mutex_destroy(&msgq->mutex);
return ECP_ERR;
}
}
return ECP_OK;
}
void ecp_conn_msgq_destroy(ECPConnMsgQ *msgq) {
int i;
if (msgq == NULL) return;
for (i=0; i<ECP_MAX_MTYPE; i++) {
pthread_cond_destroy(&msgq->cond[i]);
}
pthread_mutex_destroy(&msgq->mutex);
}
int ecp_conn_msgq_start(ECPConnMsgQ *msgq, ecp_seq_t seq) {
if (msgq == NULL) return ECP_ERR;
msgq->seq_max = seq;
msgq->seq_start = seq + 1;
return ECP_OK;
}
int ecp_conn_msgq_push(ECPConnection *conn, ecp_seq_t seq, unsigned char mtype) {
ECPRBRecv *buf = conn->rbuf.recv;
ECPConnMsgQ *msgq = buf ? &buf->msgq : NULL;
mtype &= ECP_MTYPE_MASK;
if (msgq == NULL) return ECP_ERR;
if (mtype >= ECP_MAX_MTYPE) return ECP_ERR_MAX_MTYPE;
if ((unsigned short)(msgq->idx_w[mtype] - msgq->idx_r[mtype]) == ECP_MSGQ_MAX_MSG) return ECP_MSGQ_ERR_MAX_MSG;
if (msgq->idx_w[mtype] == msgq->idx_r[mtype]) pthread_cond_signal(&msgq->cond[mtype]);
msgq->seq_msg[mtype][MSG_IDX_MASK(msgq->idx_w[mtype])] = seq;
msgq->idx_w[mtype]++;
if (ECP_SEQ_LT(msgq->seq_max, seq)) msgq->seq_max = seq;
return ECP_OK;
}
ssize_t ecp_conn_msgq_pop(ECPConnection *conn, unsigned char mtype, unsigned char *msg, size_t msg_size, ecp_cts_t timeout) {
ECPRBRecv *buf = conn->rbuf.recv;
ECPConnMsgQ *msgq = buf ? &buf->msgq : NULL;
ssize_t rv = ECP_OK;
int idx;
if (msgq == NULL) return ECP_ERR;
if (mtype >= ECP_MAX_MTYPE) return ECP_ERR_MAX_MTYPE;
if (msgq->idx_r[mtype] == msgq->idx_w[mtype]) {
if (timeout == -1) {
pthread_cond_wait(&msgq->cond[mtype], &msgq->mutex);
} else {
struct timespec ts;
int _rv = pthread_cond_timedwait(&msgq->cond[mtype], &msgq->mutex, abstime_ts(&ts, timeout));
if (_rv) rv = ECP_ERR_TIMEOUT;
}
}
if (!rv) {
ecp_seq_t seq = msgq->seq_msg[mtype][MSG_IDX_MASK(msgq->idx_r[mtype])];
ecp_seq_t seq_offset = seq - buf->rbuf.seq_start;
unsigned int idx = ECP_RBUF_IDX_MASK(buf->rbuf.msg_start + seq_offset, buf->rbuf.msg_size);
msgq->idx_r[mtype]++;
buf->rbuf.msg[idx].flags &= ~ECP_RBUF_FLAG_IN_MSGQ;
if (msgq->seq_start == seq) {
int i, _idx = idx;
ecp_seq_t msg_cnt = msgq->seq_max - msgq->seq_start + 1;
for (i=0; i<msg_cnt; i++) {
if (buf->rbuf.msg[_idx].flags & ECP_RBUF_FLAG_IN_MSGQ) break;
_idx = ECP_RBUF_IDX_MASK(_idx + 1, buf->rbuf.msg_size);
}
msgq->seq_start += i;
}
rv = buf->rbuf.msg[idx].size - 1;
if (rv >= 0) {
rv = MIN(msg_size, rv);
memcpy(msg, buf->rbuf.msg[idx].msg + 1, rv);
}
}
return rv;
}
#endif /* ECP_WITH_MSGQ */
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