-/* $Id$ */
-
/* transport - low level communication (send/receive bunches of bytes) */
/* module's private interface masked even to other parts of GRAS. */
-/* Copyright (c) 2004 Martin Quinson. All rights reserved. */
+/* 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. */
#include "xbt/sysdep.h"
#include "xbt/log.h"
-#include "xbt/error.h"
#include "xbt/dynar.h"
#include "xbt/dict.h"
-#include "gras/cond.h" /* gras_if_RL() */
+#include "gras/emul.h" /* gras_if_RL() */
-#include "gras_modinter.h" /* module init/exit */
-#include "gras/transport.h" /* rest of module interface */
+#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" /* socketset_get() */
+#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.
+
+ 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.
+
+ 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:
*/
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 raw :1; /* true if this is an experiment socket instead of messaging */
+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 bufSize; /* what to say to the OS. field here to remember it when accepting */
-
- int sd;
- int port; /* port on this side */
- int peer_port; /* port on the other side */
- char *peer_name; /* hostname of the other side */
+ unsigned long int buf_size; /* what to say to the OS.
+ Field here to remember it when accepting */
- void *data; /* plugin specific data */
+ 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);
+ gras_trp_bufdata_t *bufdata;
+} s_gras_socket_t;
+
+void gras_trp_socket_new(int incomming, gras_socket_t * dst);
/* The drivers */
-typedef xbt_error_t (*gras_trp_setup_t)(gras_trp_plugin_t *dst);
+typedef void (*gras_trp_setup_t) (gras_trp_plugin_t dst);
-xbt_error_t gras_trp_tcp_setup(gras_trp_plugin_t *plug);
-xbt_error_t gras_trp_file_setup(gras_trp_plugin_t *plug);
-xbt_error_t gras_trp_sg_setup(gras_trp_plugin_t *plug);
-xbt_error_t gras_trp_buf_setup(gras_trp_plugin_t *plug);
+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 (whith I want to get used in SG to debug
+ 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.
*/
-void gras_trp_buf_init_sock(gras_socket_t sock);
-
-
-/* Data exchange over raw sockets */
-xbt_error_t gras_socket_raw_exchange(gras_socket_t peer,
- int sender,
- unsigned int timeout,
- unsigned long int expSize,
- unsigned long int msgSize);
-
-xbt_dynar_t gras_socketset_get(void); /* FIXME:KILLME */
+gras_socket_t gras_trp_buf_init_sock(gras_socket_t sock);
-#endif /* GRAS_TRP_PRIVATE_H */
+#endif /* GRAS_TRP_PRIVATE_H */
