Add and remove printf.

src/communication.c

@@ -474,9 +474,17 @@ struct ipc_error handle_new_message (struct ipc_event *event, struct ipc_ctx *ct
 	ret = ipc_read (ctx, index, m);
 	if (ret.error_code != IPC_ERROR_NONE && ret.error_code != IPC_ERROR_CLOSED_RECIPIENT) {
 		struct ipc_error rvalue = ret;	// store the final return value
+
 		ipc_message_empty (m);
 		free (m);
 
+#ifdef DEBUG
+		printf ("error when ipc_read: index %d fd %d error num %d, message: %s\n"
+			, index, ctx->pollfd[index].fd
+			, ret.error_code
+			, ret.error_message);
+#endif
+
 		// if there is a problem, just remove the client
 		TEST_IPC_P (ipc_close (ctx, index), "cannot close a connection in handle_message");
 		TEST_IPC_P (ipc_del   (ctx, index), "cannot delete a connection in handle_message");
@@ -534,6 +542,9 @@ struct ipc_error ipc_wait_event (struct ipc_ctx *ctx, struct ipc_event *event, i
 
 	for (size_t i = 0; i < ctx->size; i++) {
 		// We assume that any fd in the list has to be listen to.
+#ifdef DEBUG
+		printf ("reading fd: %d index %lu\n", ctx->pollfd[i].fd, i);
+#endif
 		ctx->pollfd[i].events = POLLIN;
 	}
 
@@ -542,6 +553,9 @@ struct ipc_error ipc_wait_event (struct ipc_ctx *ctx, struct ipc_event *event, i
 		// … verify that its destination is available for message exchange.
 		for (size_t y = 0; y < ctx->size; y++) {
 			if (ctx->pollfd[y].fd == ctx->tx.messages[i].fd) {
+#ifdef DEBUG
+				printf ("writing fd: %d\n", ctx->pollfd[y].fd);
+#endif
 				ctx->pollfd[y].events |= POLLOUT;
 			}
 		}
@@ -648,13 +662,17 @@ struct ipc_error ipc_wait_event (struct ipc_ctx *ctx, struct ipc_event *event, i
 		}
 
 		if (ctx->pollfd[i].revents & POLLERR) {
-			printf ("POLLERR: PROBLEM WITH fd %d\n", ctx->pollfd[i].fd);
+#ifdef DEBUG
+			printf ("pollerr: problem with fd %d\n", ctx->pollfd[i].fd);
+#endif
 			IPC_EVENT_SET (event, IPC_EVENT_TYPE_ERROR, i, ctx->pollfd[i].fd, NULL);
 			goto wait_event_exit;
 		}
 
 		if (ctx->pollfd[i].revents & POLLNVAL) {
-			printf ("POLLNVAL: INVALID fd %d\n", ctx->pollfd[i].fd);
+#ifdef DEBUG
+			printf ("pollnval: invalid fd %d\n", ctx->pollfd[i].fd);
+#endif
 			IPC_EVENT_SET (event, IPC_EVENT_TYPE_ERROR, i, ctx->pollfd[i].fd, NULL);
 			goto wait_event_exit;
 		}

src/ipc.h

@@ -18,6 +18,7 @@
 #define RUNDIR "/run/ipc/"
 #define PATH_MAX 4096
 #define IPC_HEADER_SIZE 6
+// #define __IPC_BASE_SIZE       500000  // 500 KB
 #define __IPC_BASE_SIZE       2000000  // 2 MB, plenty enough space for messages
 #define IPC_MAX_MESSAGE_SIZE  __IPC_BASE_SIZE-IPC_HEADER_SIZE
 

src/network.c

@@ -88,14 +88,10 @@ void ipc_ctx_switching_add (struct ipc_ctx *ctx, int orig, int dest)
 
 void ipc_switching_add (struct ipc_switchings *is, int orig, int dest)
 {
-	// printf ("ipc_switching_add START: switchdb has %ld entries\n", is->size);
-
 	if (is->collection == NULL) {
-		// printf ("switchdb collection is null\n");
 		is->collection = malloc (sizeof (struct ipc_switching) * (is->size + 1));
 	}
 	else {
-		// printf ("switchdb collection isn't null\n");
 		is->collection = realloc (is->collection, sizeof (struct ipc_switching) * (is->size + 1));
 	}
 
@@ -114,8 +110,6 @@ void ipc_switching_add (struct ipc_switchings *is, int orig, int dest)
 	is->collection[is->size - 1].dest_in  = NULL;
 	is->collection[is->size - 1].orig_out = NULL;
 	is->collection[is->size - 1].dest_out = NULL;
-
-	// printf ("ipc_switching_add END: switchdb has %ld entries\n", is->size);
 }
 
 int ipc_ctx_switching_del (struct ipc_ctx *ctx, int fd)
@@ -293,6 +287,7 @@ struct ipc_error fd_switching_read (struct ipc_event *event, struct ipc_ctx *ctx
 
 	// If the socket is associated to another one for ipcd:
 	// read and write automatically and provide a new IPC_EVENT_TYPE indicating the switch.
+
 	T_R ((ctx->switchdb.size == 0), IPC_ERROR_FD_SWITCHING__NO_FD_RECORD);
 
 	int talkingfd = ctx->pollfd[index].fd;
@@ -387,8 +382,6 @@ struct ipc_error fd_switching_read (struct ipc_event *event, struct ipc_ctx *ctx
  */
 struct ipc_error fd_switching_write (struct ipc_event *event, struct ipc_ctx *ctx, int index)
 {
-	// printf ("fd_switching_write\n");
-
 	// If the socket is associated to another one for ipcd:
 	// read and write automatically and provide a new IPC_EVENT_TYPE indicating the switch.
 	T_R ((ctx->switchdb.size == 0), IPC_ERROR_FD_SWITCHING__NO_FD_RECORD);

src/usocket.c

@@ -23,10 +23,14 @@
 struct ipc_error usock_send (const int32_t fd, const char *buf, size_t len, size_t * sent)
 {
 	ssize_t ret = 0;
+
+#ifdef __PRINT_MSG_SIZES
+	fprintf (stderr, "a %10lu-byte message should be sent to %d\n", len, fd);
+#endif
+
 	ret = send (fd, buf, len, MSG_NOSIGNAL);
 	if (ret == -1)
 	{
-		// TODO: Check for errno.
 		// Some choice could be made.
 		switch (errno) {
 
@@ -125,6 +129,12 @@ struct ipc_error usock_recv (const int32_t fd, char **buf, size_t * len)
 			if (msize == 0) {
 				memcpy (&msize, *buf + 1, sizeof msize);
 				msize = ntohl (msize);
+
+#ifdef __PRINT_MSG_SIZES
+				fprintf (stderr, "a %10u-byte message should be received on %d\n"
+					, msize + IPC_HEADER_SIZE
+					, fd);
+#endif
 			}
 			// else {
 			// 	printf ("USOCKET: We received a message in (at least) two packets (receveid %u bytes).\n", msize_read);