-/* $Id$ */
+/* transport - low level communication (send/receive bunches of bytes) */
-/* trp (transport) - send/receive a bunch of bytes */
+/* module's private interface masked even to other parts of GRAS. */
-/* This file implements the public interface of this module, exported to the*/
-/* other modules of GRAS, but not to the end user. */
-
-/* Authors: Martin Quinson */
-/* Copyright (C) 2004 Martin Quinson. */
+/* Copyright (c) 2004, 2005, 2006, 2007, 2009, 2010. The SimGrid Team.
+ * All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
- under the terms of the license (GNU LGPL) which comes with this package. */
+ * under the terms of the license (GNU LGPL) which comes with this package. */
#ifndef GRAS_TRP_PRIVATE_H
#define GRAS_TRP_PRIVATE_H
-#include "gras_private.h"
-/* A low-level socket type (each plugin implements it the way it prefers */
-//typedef void gras_trp_sock_t;
-
-/* A plugin type */
-struct gras_trp_plugin_ {
- const char *name;
-
- gras_error_t (*init)(void);
- void (*exit)(gras_trp_plugin_t *);
-
- gras_error_t (*socket_client_open)(const char *host,
- unsigned short port,
- int raw,
- unsigned int bufSize,
- /* OUT */ gras_trp_sock_t **dst);
- gras_error_t (*socket_server_open)(unsigned short port,
- int raw,
- unsigned int bufSize,
- /* OUT */ gras_trp_sock_t **dst);
- void (*socket_close)(gras_trp_sock_t **sd);
+#include "xbt/sysdep.h"
+#include "xbt/log.h"
+#include "xbt/dynar.h"
+#include "xbt/dict.h"
+
+#include "gras/emul.h" /* gras_if_RL() */
+
+#include "gras_modinter.h" /* module init/exit */
+#include "gras/transport.h" /* rest of module interface */
+
+#include "gras/Transport/transport_interface.h" /* semi-public API */
+#include "gras/Virtu/virtu_interface.h" /* libdata management */
+
+extern int gras_trp_libdata_id; /* our libdata identifier */
+
+/* The function that select returned the last time we asked. We need this
+ because the TCP read are greedy and try to get as much data in their
+ buffer as possible (to avoid subsequent syscalls).
+ (measurement sockets are not buffered and thus not concerned).
+
+ So, we can get more than one message in one shoot. And when this happens,
+ we have to handle the same socket again afterward without select()ing at
+ all.
- gras_error_t (*select)(double timeOut,
- gras_trp_sock_t **sd);
-
- gras_error_t (*bloc_send)(gras_trp_sock_t *sd,
- void *data,
- size_t size,
- double timeOut);
- gras_error_t (*bloc_recv)(gras_trp_sock_t *sd,
- void *data,
- size_t size,
- double timeOut);
- gras_error_t (*flush)(gras_trp_sock_t *sd);
+ Then, this data is not a static of the TCP driver because we want to
+ zero it when it gets closed by the user. If not, we use an already freed
+ pointer, which is bad.
- void *specific;
-};
-
-/**********************************************************************
- * Internal stuff to the module. Other modules shouldn't fool with it *
- **********************************************************************/
-
-/* TCP driver */
-gras_error_t gras_trp_tcp_init(void);
-void gras_trp_tcp_exit(gras_trp_plugin_t *plugin);
-gras_error_t gras_trp_tcp_socket_client(const char *host,
- unsigned short port,
- int raw,
- unsigned int bufSize,
- /* OUT */ gras_trp_sock_t **dst);
-gras_error_t gras_trp_tcp_socket_server(unsigned short port,
- int raw,
- unsigned int bufSize,
- /* OUT */ gras_trp_sock_t **dst);
-void gras_trp_tcp_socket_close(gras_trp_sock_t **sd);
-gras_error_t gras_trp_tcp_select(double timeOut,
- gras_trp_sock_t **sd);
+ It gets tricky since gras_socket_close is part of the common API, not
+ only the RL one. */
+extern gras_socket_t _gras_lastly_selected_socket;
+
+/**
+ * s_gras_socket:
+ *
+ * Description of a socket.
+ */
+typedef struct gras_trp_bufdata_ gras_trp_bufdata_t;
+
+typedef struct s_gras_socket {
+ gras_trp_plugin_t plugin;
+
+ int incoming:1; /* true if we can read from this sock */
+ int outgoing:1; /* true if we can write on this sock */
+ int accepting:1; /* true if master incoming sock in tcp */
+ int meas:1; /* true if this is an experiment socket instead of messaging */
+ int valid:1; /* false if a select returned that the peer quitted, forcing us to "close" the socket */
+ int moredata:1; /* TCP socket use a buffer and read operation get as much
+ data as possible. It is possible that several messages
+ are received in one shoot, and select won't catch them
+ afterward again.
+ This boolean indicates that this is the case, so that we
+ don't call select in that case. Note that measurement
+ sockets are not concerned since they use the TCP
+ interface directly, with no buffer. */
+
+ int recvd:1; /* true if the recvd_val field contains one byte of the stream (that we peek'ed to check the socket validity) */
+ char recvd_val; /* what we peeked from the socket, if any */
+
+ unsigned long int buf_size; /* what to say to the OS.
+ Field here to remember it when accepting */
+
+ int sd;
+
+ void *data; /* plugin specific data */
+
+ /* buffer plugin specific data. Yeah, C is not OO, so I got to trick */
+ gras_trp_bufdata_t *bufdata;
+} s_gras_socket_t;
+
+void gras_trp_socket_new(int incomming, gras_socket_t * dst);
+
+/* The drivers */
+typedef void (*gras_trp_setup_t) (gras_trp_plugin_t dst);
+
+void gras_trp_tcp_setup(gras_trp_plugin_t plug);
+void gras_trp_iov_setup(gras_trp_plugin_t plug);
+void gras_trp_file_setup(gras_trp_plugin_t plug);
+void gras_trp_sg_setup(gras_trp_plugin_t plug);
+
+/* FIXME: this should be solved by SIMIX
+
+ I'm tired of that shit. the select in SG has to create a socket to expeditor
+ manually do deal with the weirdness of the hostdata, themselves here to deal
+ with the weird channel concept of SG and convert them back to ports.
+
+ When introducing buffered transport (which I want to get used in SG to debug
+ the buffering itself), we should not make the rest of the code aware of the
+ change and not specify code for this. This is bad design.
+
+ But there is bad design all over the place, so fuck off for now, when we can
+ get rid of MSG and rely directly on SG, this crude hack can go away. But in
+ the meanwhile, I want to sleep this night (FIXME).
-gras_error_t gras_trp_tcp_bloc_send(gras_trp_sock_t *sd,
- void *data,
- size_t size,
- double timeOut);
-
-gras_error_t gras_trp_tcp_bloc_recv(gras_trp_sock_t *sd,
- void *data,
- size_t size,
- double timeOut);
-gras_error_t gras_trp_tcp_flush(gras_trp_sock_t *sd);
-
-/* SG driver */
-gras_error_t gras_trp_sg_init(void);
-void gras_trp_sg_exit(gras_trp_plugin_t *plugin);
-gras_error_t gras_trp_sg_socket_client(const char *host,
- unsigned short port,
- int raw,
- unsigned int bufSize,
- /* OUT */ gras_trp_sock_t **dst);
-gras_error_t gras_trp_sg_socket_server(unsigned short port,
- int raw,
- unsigned int bufSize,
- /* OUT */ gras_trp_sock_t **dst);
-void gras_trp_sg_socket_close(gras_trp_sock_t **sd);
-gras_error_t gras_trp_sg_select(double timeOut,
- gras_trp_sock_t **sd);
-
-gras_error_t gras_trp_sg_bloc_send(gras_trp_sock_t *sd,
- void *data,
- size_t size,
- double timeOut);
-
-gras_error_t gras_trp_sg_bloc_recv(gras_trp_sock_t *sd,
- void *data,
- size_t size,
- double timeOut);
-gras_error_t gras_trp_sg_flush(gras_trp_sock_t *sd);
-
-
-
-#endif /* GRAS_TRP_PRIVATE_H */
+ Hu! You evil problem! Taste my axe!
+
+*/
+
+gras_socket_t gras_trp_buf_init_sock(gras_socket_t sock);
+
+#endif /* GRAS_TRP_PRIVATE_H */
