safe commit;

include/sntl/connection.h

@@ -71,6 +71,8 @@ typedef struct __connection_t {
   int ssl_data_index; /** < SSL index for the custom data */
   perm_ctx_t *pctx; /** < higher layer authentification context */
   pthread_t cthread; /** < thread for listening the connection socket */
+  pthread_t msgthread; /** < thread for message queue (2) */
+  pth_queue_t *mqueue; /** < message queue (2) */
   pthread_mutex_t oplock; /** < mutex used to sync operations on connection */
   pthread_rwlock_t chnl_lock; /** < rwlock used to sync ops with channels */
   int flags; /** < flags of the connection */
@@ -110,6 +112,10 @@ typedef struct __sexp_payload_t {
 #define ESXMSG_USR       (1 << 2)
 #define ESXMSG_PENDING   (1 << 3)
 #define ESXMSG_NOWAY     (1 << 4)
+#define ESXMSG_TIMEDOUT  (1 << 5)
+#define ESXMSG_PULSE     (1 << 6)
+#define ESXMSG_NOWAIT    (1 << 7)
+#define ESXMSG_ISREPLY   (1 << 8)
 
 typedef struct __message_t {
   chnl_t *pch; /** < channel of the message(if applicable) */

lib/connection.c

@@ -564,7 +564,7 @@ static int __default_ch_open_ret(void *cctx, sexp_t *sx)
   lsx = sx->list->next;
   /* now we expect a list of lists */
   if(lsx->ty != SEXP_LIST) {
-    printf("%s:%d\n", __FUNCTION__, __LINE__);
+    //printf("%s:%d\n", __FUNCTION__, __LINE__);
     r = EINVAL; /* TODO: right opcode */
     goto __mark_msg;
   }
@@ -716,8 +716,6 @@ static void *__cxslave_thread_listener(void *wctx)
   char *buf = malloc(4096);
   int r;
 
-  printf("Slave listening thread\n");
-
   while((r = __conn_read(co, buf, 4096)) != -1) {
     if(r) printf("Got the message %s \n", buf);
     r = __eval_cstr(buf, conn_sys->system_rpc, co);
@@ -734,8 +732,6 @@ static void *__cxmaster_thread_listener(void *wctx)
   char *buf = malloc(4096);
   int r;
 
-  printf("Master listening thread\n");
-
   while((r = __conn_read(co, buf, 4096)) != -1) {
     if(r) printf("Got the message %s \n", buf);
     r = __eval_cstr(buf, conn_sys->system_rpc, co);
@@ -746,6 +742,81 @@ static void *__cxmaster_thread_listener(void *wctx)
   return NULL;
 }
 
+static void *__msg_queue_thread(void *ctx)
+{
+  conn_t *co = (conn_t *)ctx;
+  pth_msg_t *tmp = malloc(sizeof(pth_msg_t));
+  sxmsg_t *msg;
+  chnl_t *ch;
+  int r = 0, len;
+  char *buf = malloc(4096), *tb;
+  sexp_t *sx;
+
+  if(!tmp || !buf) {
+    if(tmp) free(tmp);
+    if(buf) free(buf);
+    return NULL;
+  }
+
+  while(1) {
+    r = pth_queue_get(co->mqueue, NULL, tmp);
+    if(r) {
+      free(buf);
+      free(tmp);
+      return NULL;
+    }
+
+    /* message workout */
+    msg = tmp->data;
+    if(!msg) continue; /* spurious message */
+
+    if(!(sysmsg->flags & ESXMSG_USR)) { /* not a regular message */
+      msg->flags |= ESXMSG_NOWAY; /* mark it's as undeliverable */
+      msg->flags &= ~ESXMSG_PENDING;
+      pthread_mutex_unlock(&(msg->wait)); /* wake up the waitee */
+      continue;
+    } else {
+      ch = msg->pch;
+      /* now we need to complete the request */
+      sx = (sexp_t *)msg->payload; tb = buf;
+      if(!(msg->flags & ESXMSG_PULSE)) { /* %s))) */
+        snprintf(buf, 4096, "(ch-msg (:chid %lu (:msgid %lu ", ch->cid,
+                 msg->mid);
+        len = strlen(buf);
+        tb += len*sizeof(char);
+        if(print_sexp(tb, 4096 - (len + 4*sizeof(char)), sx)) {
+          sx->opcode = ENOMEM;
+          /* we don't need to wake up anybody */
+          if(sx->flags & ESXMSG_TIMEDOUT) {
+            /* clean up all the shit:
+             * 1. remove from message tree
+             * 2. destroy message itself
+             */
+            /* TODO: destroy the message */
+          } else
+            pthread_mutex_unlock(&(msg->wait));
+        }
+        len = strlen(tb);
+        tb += len*sizeof(char);
+        strcat(tb, ")))\0");
+      } else { /* pulse messages */
+      }
+
+      /* write it */
+      pthread_mutex_lock(&(co->oplock)); /* exclusive write */
+      SSL_write(co->ssl, (void *)buf, strlen(buf) + sizeof(char); /* TODO: SSL*/
+      pthread_mutex_unlock(&(co->oplock));
+    }
+
+    len = 0;
+  }
+
+  free(msg);
+  free(buf);
+
+  return NULL;
+}
+
 /* this function is an ugly implementation to get C string with uuid */
 static char *__generate_uuid(void)
 {
@@ -919,7 +990,6 @@ int connections_subsystem_init(void)
 
   /* init SSL library */
   SSL_library_init();
-  printf("here\n");
 
   OpenSSL_add_all_algorithms();
   SSL_load_error_strings();
@@ -1307,6 +1377,44 @@ static sxmsg_t *__allocate_msg(int *res)
   return msg;
 }
 
+static void __destroy_msg(sxmsg_t *msg)
+{
+  chnl_t *ch = msg->nch;
+
+  if(sm->flags & ESXMSG_USR) {
+    pthread_mutex_lock(&(ch->oplock));
+    idx_free(ch->idx_msg, sm->mid);
+    pthread_mutex_unlock(&(ch->oplock));
+  }
+
+  pthread_mutex_unlock(&(msg->wait));
+  pthread_mutex_destroy(&(msg->wait));
+  free(msg);
+  return;
+}
+
+static int __create_reg_msg(sxmsg_t **msg, chnl_t *ch)
+{
+  int r = 0;
+  sxmsg_t *sm = __allocate_msg(&r);
+
+  if(r) return r;
+  else {
+    sm->pch = ch;
+    sm->flags = (ESXMSG_USR | ESXMSG_PENDING);
+
+    /* ok allocate message ID */
+    pthread_mutex_lock(&(ch->oplock));
+    sm->mid = idx_allocate(ch->idx_msg);
+    pthread_mutex_unlock(&(ch->oplock));
+
+    pthread_mutex_lock(&(sm->wait));
+    *msg = sm;
+  }
+
+  return 0;
+}
+
 static int __create_sys_msg(sxmsg_t **msg, char *uuid, chnl_t *ch, sxpayload_t *data)
 {
   int r = 0;
@@ -1436,11 +1544,29 @@ int channel_close(conn_t *co)
 }
 
 /* message passing */
+
+/*
+ * How message sending works:
+ * 1. Create a message structure assigned to the channel,
+ * 2. Put S-expression context to it
+ * 3. Put the message to the queue
+ * 4. expect the result waiting on the lock mutex
+ */
 static int __message_send(chnl_t *ch, sexp_t *sx, sxmsg_t **msg, struct timespec *tio)
 {
   int r = 0;
   sxmsg_t *m = NULL;
 
+  r = __create_reg_msg(&m, ch);
+  if(r) return r;
+  else {
+    /* put the message to the search tree */
+    pthread_rwlock_wrlock(&(ch->msglock));
+    usrtc_insert(ch->msgs_tree, &(m->pendinq_node), &(m->mid));
+    pthread_rwlock_unlock(&(ch->msglock));
+    /* put the message to the run queue */
+  }
+
   return r;
 }